WO2024089804A1 - Position estimation device, position estimation method, and program - Google Patents

Position estimation device, position estimation method, and program Download PDF

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Publication number
WO2024089804A1
WO2024089804A1 PCT/JP2022/039936 JP2022039936W WO2024089804A1 WO 2024089804 A1 WO2024089804 A1 WO 2024089804A1 JP 2022039936 W JP2022039936 W JP 2022039936W WO 2024089804 A1 WO2024089804 A1 WO 2024089804A1
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Prior art keywords
ear
open
user
type earphone
earphone
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PCT/JP2022/039936
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French (fr)
Japanese (ja)
Inventor
達也 加古
詩穂里 小塚
大将 千葉
弘章 伊藤
賢一 野口
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日本電信電話株式会社
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Priority to PCT/JP2022/039936 priority Critical patent/WO2024089804A1/en
Publication of WO2024089804A1 publication Critical patent/WO2024089804A1/en

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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K15/00—Acoustics not otherwise provided for
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones

Definitions

  • the present invention relates to technology for reproducing acoustic signals using open-ear earphones that do not block the ear canal.
  • Earphones are classified into canal-type earphones that block the ear canal, and open-ear-type earphones that do not.
  • Canal-type earphones have an "ear tip" shaped like an earplug attached to the tip of the earphone, which seals the ear canal. With canal-type earphones, it is necessary to select an ear tip that fits the size of the ear canal, but it is difficult for users to determine for themselves whether the ear tip is the optimal size.
  • Non-Patent Document 1 is known as a conventional technique for determining whether or not an optimal size canal-type earphone is being worn. Non-Patent Document 1 describes that by playing sound while the canal-type earphone is worn, it is possible to check whether the canal-type earphone is worn and sealing the ear canal.
  • Open-ear earphones are attached by hooking parts of the earphone onto the part of the auricle (the part of the ear that sticks outwards) called the concha. Open-ear earphones do not use ear tips, so there is no need to adjust the size.
  • the present invention aims to provide a position estimation device, a position estimation method, and a program that estimate whether an open-ear type earphone is correctly placed on the ear.
  • a position estimation device includes a memory unit that stores a resonant frequency f1 of a space formed by a user's ear and the open-ear type earphone, and an estimation unit that obtains a resonant frequency f2 of the space formed by the user's ear and the open-ear type earphone using a picked-up signal obtained by picking up a predetermined signal through a speaker included in the open-ear type earphone while the user is wearing the open-ear type earphone, and estimates that the open-ear type earphone is worn in an ideal position on the user's ear if the resonant frequencies f1 and f2 are equal, and the resonant frequency f1 is obtained using a picked-up signal obtained by picking up a predetermined signal through a speaker while the open-ear type earphone is worn in an ideal position on the user's ear.
  • the present invention has the effect of being able to estimate whether an open-ear type earphone including a speaker and a microphone is correctly placed on the ear without using any special device.
  • FIG. 1 is a diagram for explaining a simulation situation.
  • FIG. 13 is a diagram showing the relationship between space volume and resonant frequency.
  • FIG. 13 shows frequency characteristics measured while changing the position of the open-ear earphone.
  • FIG. 11 is a diagram showing an example of a mounting position.
  • FIG. 1 is a functional block diagram of a position estimation device according to a first embodiment.
  • FIG. 4 is a diagram showing an example of a processing flow of the position estimation device according to the first embodiment.
  • FIG. 13 is a diagram showing an example of the configuration of a computer to which the present technique is applied.
  • the resonance frequency between the open-ear earphone and the ear is used to estimate whether the earphone is worn correctly.
  • Open-ear earphones often have a microphone for voice capture in the housing, so that they can be used not only for listening to music, but also for voice calls and voice recognition when connected to a smartphone or PC.
  • the housing often also has a microphone for capturing environmental sounds in order to achieve noise cancellation, echo cancellation, etc.
  • the open-ear earphones according to this embodiment are considered to include a speaker and a microphone.
  • the phenomenon in which the resonant frequency changes depending on the volume of the space formed between the ear and the housing of the open-ear earphone is used to estimate whether the open-ear earphone is correctly placed on the ear.
  • a specific signal is played from a speaker included in the open-ear earphones, and the played sound is picked up by a microphone included in the open-ear earphones.
  • the resonant frequency that occurs in the space between the ear and the housing is found from the frequency characteristics of the picked-up acoustic signal, and from the found resonant frequency it is estimated whether the open-ear earphones are worn in the usual position (appropriate wearing position) or in a position different from the usual position (inappropriate wearing position).
  • FIG. 1 is a diagram for explaining the situation of the simulation
  • FIG. 2 is a diagram showing the relationship between the volume of the space and the resonant frequency.
  • the volume of the space 20 is changed by changing the position of the housing 10 of the open-ear type earphone.
  • the volume is changed every 200 mm 3 , and the frequency characteristics are obtained at 600 mm 3 to 1400 mm 3.
  • the sound pressure level at the eardrum position and the sound pressure level at a position 150 mm from the rear side of the housing are obtained.
  • the rear side of the housing is the surface opposite to the surface on which the earphone is worn
  • the position 150 mm from the rear side of the housing is a position 150 mm away from the rear side of the housing in the direction of the rear side of the housing as viewed from the center of the housing.
  • the position of the peak frequency that appears in the 10 kHz-11 kHz band shifted whether it was at the eardrum position or 150 mm from the rear of the housing. Note that the smaller the space, the more the position of the peak frequency shifts to a higher frequency. In this embodiment, by observing the position of this peak frequency, it is possible to determine whether the headphones are being worn in a different position than usual.
  • the resonant frequency is obtained by calculating the impulse response using the TSP method, and then calculating the resonant frequency from the impulse response.
  • a TSP Time Stretched Pulse
  • the stretched signal is compressed (impulse-converted) by convolving the time-reversed TSP signal with the picked-up signal to find the impulse response.
  • Figure 3 shows the frequency characteristics measured while changing the wearing position of the open-ear type earphone.
  • Figure 4 shows examples of wearing positions. Wearing positions 1 and 3 show examples when the open-ear type earphone is worn in a position different from the usual wearing position (inappropriate wearing position), and wearing positions 2 and 4 show examples when the open-ear type earphone is worn in the same position as the usual wearing position (appropriate wearing position).
  • This configuration it is possible to estimate whether the wearing position is correct from the speaker and microphone included in typical open-ear earphones without using special sensors, etc., and it is possible to solve the problem of open-ear earphones not being able to be worn in the appropriate position.
  • This invention is particularly useful for open-ear earphones that are attached behind the ears, where the wearing position is easily shifted.
  • FIG. 5 is a functional block diagram of the position estimation device according to the first embodiment, and FIG. 6 shows the processing flow thereof.
  • the position estimation device includes a generation unit 110, a storage unit 130, and an estimation unit 140.
  • the position estimation device is connected to the open-ear earphones 90 so as to be able to communicate with them via wired or wireless communication, and outputs a predetermined signal that is reproduced by a speaker 91 included in the open-ear earphones 90. Furthermore, the position estimation device receives as input a picked-up signal that is obtained by picking up the predetermined signal reproduced by the speaker 91 with a microphone 92 included in the open-ear earphones 90.
  • the position estimation device estimates the wearing position of the open-ear earphones from the picked-up sound signal and outputs the estimation result.
  • the location estimation device is a special device configured by loading a special program into a publicly known or dedicated computer having, for example, a central processing unit (CPU), a main memory (RAM), etc.
  • the location estimation device executes each process under the control of the central processing unit, for example.
  • Data input to the location estimation device and data obtained by each process are stored in, for example, the main memory, and the data stored in the main memory is read out to the central processing unit as necessary and used for other processes.
  • At least a part of each processing unit of the location estimation device may be configured with hardware such as an integrated circuit.
  • Each storage unit of the location estimation device may be configured with, for example, a main storage device such as a RAM (Random Access Memory), or middleware such as a relational database or a key-value store.
  • each storage unit does not necessarily have to be provided inside the location estimation device, and may be configured with an auxiliary storage device configured with a semiconductor memory element such as a hard disk, optical disk, or flash memory, and may be configured to be
  • the estimation process consists of a preparation stage, which is carried out before estimating the mounting position, and an estimation stage. First, the preparation stage will be explained.
  • a user of the open-ear type earphones wears the open-ear type earphones in the ideal position (appropriate wearing position) of the auricle. Whether or not the earphones are worn in the ideal position may be judged subjectively by the user, or may be judged objectively by a third party with specialized knowledge who checks the wearing position.
  • the generating unit 110 generates a predetermined signal to be played by the speaker 91 (S101) and outputs the signal to the speaker 91.
  • the predetermined signal is a TSP signal.
  • the sound played by the speaker 91 is picked up by the microphone 92 (S105).
  • the estimation unit 140 receives a collected sound signal obtained by collecting sound with the microphone 92 as an input, obtains the resonance frequency f2 of the space formed by the user's ear and the open-ear type earphone using the collected sound signal (S109), and stores the frequency in the storage unit 130 (S111).
  • the estimation unit 140 obtains an impulse response by compressing (impulsing) the extended signal by convolving the time-reversed TSP signal with the collected sound signal using the TSP method, and obtains the resonance frequency f2 from the impulse response.
  • the preparation stage includes the above steps S101 to S111. Next, the estimation stage will be explained.
  • ⁇ Estimation stage> First, a user of the open-ear type earphones places the open-ear type earphones on the auricle.
  • the generating unit 110 generates a predetermined signal to be played by the speaker 91 (S201) and outputs it to the speaker 91.
  • the predetermined signal is the same as the signal used in the preparation stage.
  • a predetermined signal is played through the speaker 91 (S203).
  • the sound played by the speaker 91 is picked up by the microphone 92 (S205).
  • the estimation unit 240 receives the collected sound signal obtained by collecting sound with the microphone 92 as an input, and obtains the resonance frequency f 1 of the space formed by the user's ear and the open-ear earphone using the collected sound signal (S209).
  • the method of obtaining the resonance frequency from the collected sound signal is the same as that in the preparation stage.
  • the estimation unit 240 refers to the resonance frequency f 2 stored in the storage unit 130, and if the resonance frequencies f 1 and f 2 match (YES in S211), it estimates that the open-ear earphone is attached to the ideal position of the user's ear, and outputs an estimation result indicating that the wearing position is appropriate (S213).
  • the estimation unit 240 estimates that the open-ear earphone is not attached to the ideal position of the user's ear, and outputs an estimation result indicating that the wearing position is inappropriate (S215).
  • the resonance frequencies f 1 and f 2 match not only when they match completely, but also when the difference between the resonance frequencies f 1 and f 2 is within a predetermined range. In actual use, even if the open-ear type earphone is worn in an appropriate position, the position may change slightly, and the resonant frequency may change slightly accordingly. Therefore, when the difference between the resonant frequencies f1 and f2 falls within the range that can be considered to be the ideal position, the resonant frequencies f1 and f2 are considered to be the same.
  • the location estimation device is implemented on a smartphone.
  • a position estimation application is started automatically or by user operation, and a preparatory process is performed.
  • the position estimation device When the application is launched, the position estimation device displays a message on the smartphone's touch panel encouraging the user to place the open-ear earphones 90 in an appropriate position and play a specific signal. For example, the position estimation device displays a play button along with the message "Put the open-ear earphones 90 in an appropriate position and tap the 'Play' button.”
  • the position estimation device When an operation intended to play a predetermined signal is performed (for example, when the "play" button is tapped), the position estimation device generates a predetermined signal (S101) and plays it on the speaker 91 (S103). Furthermore, the sound played on the speaker 91 is collected by the microphone 92 (S105), and the position estimation device obtains a resonance frequency f2 using the collected sound signal (S109) and stores it in the storage unit 130 (S111). If the obtained resonance frequency f2 is within an appropriate range, the position estimation device displays a message on the touch panel of the smartphone indicating that preparation for position estimation is complete.
  • the position estimation device displays a message saying "The appropriate position of the open-ear type earphone 90 has been registered.” If the obtained resonance frequency f2 is not within the appropriate range, the position estimation device displays a message on the touch panel of the smartphone indicating that position estimation is not complete. For example, the position estimation device displays a play button along with a message saying "The open-ear type earphone 90 is not attached in an appropriate position. Please attach it in an appropriate position and tap the 'Play' button again," and repeats the above-mentioned processes S101 to S111. Note that the appropriate range of the resonance frequency f2 may be obtained in advance by experiment or simulation, taking into account various ear shapes and sizes.
  • a position estimation application is started automatically or by user operation, and the estimation stage processing is performed.
  • the position estimation device When the application is started, the position estimation device automatically generates a predetermined signal (S201) and plays it on the speaker 91 (S203). Furthermore, the sound played on the speaker 91 is collected by the microphone 92 (S205), and the collected sound signal is used to obtain the resonance frequency f1 (S209). If the obtained resonance frequency f1 matches the resonance frequency f2 stored in the storage unit 130 (YES in S211), the position estimation device may display a message indicating that the open-ear type earphone 90 is attached in an appropriate position on the touch panel of the smartphone, or may not display any message (in this case, the absence of any message means that the open-ear type earphone 90 is attached in an appropriate position).
  • the position estimation device displays a message indicating that the open-ear type earphone 90 is not attached in an appropriate position on the touch panel of the smartphone, as well as a message urging the user to reattach the open-ear type earphone 90 to an appropriate position.
  • the position estimation device displays a completion button along with a message saying, "The open-ear type earphones 90 are not attached in an appropriate position. Please put them back in an appropriate position and tap the 'Done'button.” When the 'Done' button is tapped, the above-mentioned processes S201 to S211 are repeated.
  • the predetermined signal is generated by the generating unit 110, but a configuration may be adopted in which a predetermined signal generated in advance is stored in a storage unit (not shown) and output to the speaker 91. In this case, the position estimation device does not need to include the generating unit 110.
  • the present invention is not limited to the above-mentioned embodiment and modified examples.
  • the above-mentioned various processes may be executed not only in chronological order as described, but also in parallel or individually depending on the processing capacity of the device executing the processes or as necessary.
  • appropriate modifications are possible within the scope of the present invention.
  • ⁇ Program and recording medium> The various processes described above can be implemented by loading a program that executes each step of the above method into the recording unit 2020 of the computer 2000 shown in FIG. 7, and operating the control unit 2010, input unit 2030, output unit 2040, display unit 2050, etc.
  • the program describing this processing can be recorded on a computer-readable recording medium.
  • Examples of computer-readable recording media include magnetic recording devices, optical disks, magneto-optical recording media, and semiconductor memories.
  • the program may be distributed, for example, by selling, transferring, or lending portable recording media such as DVDs or CD-ROMs on which the program is recorded. Furthermore, the program may be distributed by storing the program in a storage device of a server computer and transferring the program from the server computer to other computers via a network.
  • a computer that executes such a program for example, first stores in its own storage device the program recorded on a portable recording medium or the program transferred from a server computer. Then, when executing a process, the computer reads the program stored on its own recording medium and executes the process according to the read program. As another execution form of the program, the computer may read the program directly from the portable recording medium and execute the process according to the program, or may execute the process according to the received program each time a program is transferred from the server computer to the computer.
  • the above-mentioned process may also be executed by a so-called ASP (Application Service Provider) type service that does not transfer the program from the server computer to the computer, but realizes the processing function only by issuing an execution instruction and obtaining the results.
  • ASP Application Service Provider
  • the program in this form includes information used for processing by an electronic computer that is equivalent to a program (such as data that is not a direct command to the computer but has properties that specify the processing of the computer).
  • the device is configured by executing a specific program on a computer, but at least a portion of the processing may be realized by hardware.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Headphones And Earphones (AREA)

Abstract

Provided are a position estimation device and the like for estimating whether or not a position of an open-ear earphone worn on the ear is correct. The position estimation device comprises: a storage unit which stores a resonance frequency f1 of a space formed between the ear of a user and the open-ear earphone; and an estimation unit which obtains a resonance frequency f2 of the space formed between the ear of the user and the open-ear earphone through use of a sound collection signal obtained by a microphone included in the open-ear earphone collecting sound when a predetermined signal is reproduced by a speaker included in the open-ear earphone in a state in which the open-ear earphone is worn by the user and estimates, when the resonance frequencies f1 and f2 match, that the open-ear earphone is worn at an ideal position on the ear of the user. The resonance frequency f1 is obtained through use of a sound collection signal acquired by the sound collection using the microphone when the predetermined signal is reproduced by the speaker in the state in which the open-ear earphone is worn at the ideal position on the ear of the user.

Description

位置推定装置、位置推定方法、およびプログラムPosition estimation device, position estimation method, and program
　本発明は、外耳道を塞がないオープンイヤー型のイヤホンで音響信号を再生するための技術に関する。 The present invention relates to technology for reproducing acoustic signals using open-ear earphones that do not block the ear canal.
　イヤホンには、外耳道を塞ぐカナル型イヤホンと、外耳道を塞がないオープンイヤー型イヤホンとがある。カナル型イヤホンは、イヤホンの先端に耳栓に似た形状の「イヤーチップ」が付いており、外耳道を密閉する。カナル型イヤホンでは、耳の穴のサイズに合うイヤーチップを選ぶ必要があるが，イヤーチップが最適なサイズなのかをユーザ自身で判断するのは難しい。そこで、最適なサイズのカナル型イヤホンが装着されているか否かを判定する従来技術として、非特許文献１が知られている。非特許文献１には、カナル型イヤホンを装着した状態で音を再生することで、カナル型イヤホンが外耳道を密閉して装着されているかを確認することができることが記載されている。 Earphones are classified into canal-type earphones that block the ear canal, and open-ear-type earphones that do not. Canal-type earphones have an "ear tip" shaped like an earplug attached to the tip of the earphone, which seals the ear canal. With canal-type earphones, it is necessary to select an ear tip that fits the size of the ear canal, but it is difficult for users to determine for themselves whether the ear tip is the optimal size. As such, Non-Patent Document 1 is known as a conventional technique for determining whether or not an optimal size canal-type earphone is being worn. Non-Patent Document 1 describes that by playing sound while the canal-type earphone is worn, it is possible to check whether the canal-type earphone is worn and sealing the ear canal.
　オープンイヤー型イヤホンの場合、耳介（耳全体のうち外に出ている部分）の耳甲介と呼ばれる部分にイヤホンのパーツを引っ掛けて装着する。オープンイヤー型イヤホンは、イヤーチップを用いないため、そのサイズの調整は不要である。 　Open-ear earphones are attached by hooking parts of the earphone onto the part of the auricle (the part of the ear that sticks outwards) called the concha. Open-ear earphones do not use ear tips, so there is no need to adjust the size.
　しかしながら、オープンイヤー型イヤホンの耳への装着位置が正しいか否かを利用者が把握できない場合がある。正しい位置にオープンイヤー型イヤホンを装着することができない場合、音響特性が変わってしまい、音の特性が変わるという問題や、立体音響の方向知覚が正しくできないという問題がある。 However, there are cases where users are unable to determine whether the open-ear earphones are placed correctly on their ears. If the open-ear earphones cannot be placed correctly, the acoustic characteristics change, leading to problems such as changes in the characteristics of the sound and an inability to properly perceive the direction of stereophonic sound.
　本発明は、オープンイヤー型イヤホンの耳への装着位置が正しいか否かを推定する位置推定装置、位置推定方法、およびプログラムを提供することを目的とする。 The present invention aims to provide a position estimation device, a position estimation method, and a program that estimate whether an open-ear type earphone is correctly placed on the ear.
　上記の課題を解決するために、本発明の一態様によれば、位置推定装置は、利用者の耳とオープンイヤー型イヤホンとで形成された空間の共振周波数f1を記憶する記憶部と、オープンイヤー型イヤホンを利用者が装着した状態で、所定の信号をオープンイヤー型イヤホンに含まれるスピーカで再生したときにオープンイヤー型イヤホンに含まれるマイクで収音して得られる収音信号を用いて、利用者の耳とオープンイヤー型イヤホンとで形成された空間の共振周波数f2を得、共振周波数f1とf2とが一致する場合には、オープンイヤー型イヤホンが利用者の耳の理想的な位置に装着されていると推定する推定部とを含み、共振周波数f1は、オープンイヤー型イヤホンを利用者の耳の理想的な位置に装着した状態で、所定の信号をスピーカで再生したときにマイクで収音して得られる収音信号を用いて、得られるものである。 In order to solve the above problem, according to one aspect of the present invention, a position estimation device includes a memory unit that stores a resonant frequency f1 of a space formed by a user's ear and the open-ear type earphone, and an estimation unit that obtains a resonant frequency f2 of the space formed by the user's ear and the open-ear type earphone using a picked-up signal obtained by picking up a predetermined signal through a speaker included in the open-ear type earphone while the user is wearing the open-ear type earphone, and estimates that the open-ear type earphone is worn in an ideal position on the user's ear if the resonant frequencies f1 and f2 are equal, and the resonant frequency f1 is obtained using a picked-up signal obtained by picking up a predetermined signal through a speaker while the open-ear type earphone is worn in an ideal position on the user's ear.
　本発明によれば、特別な装置を用いることなく、スピーカとマイクとを含むオープンイヤー型イヤホンの耳への装着位置が正しいか否かを推定することができるという効果を奏する。 The present invention has the effect of being able to estimate whether an open-ear type earphone including a speaker and a microphone is correctly placed on the ear without using any special device.
シミュレーションの状況を説明するための図。FIG. 1 is a diagram for explaining a simulation situation. 空間の容積と共振周波数との関係を示す図。FIG. 13 is a diagram showing the relationship between space volume and resonant frequency. オープンイヤー型イヤホンの装着位置を変えながら測定した周波数特性を示す図。FIG. 13 shows frequency characteristics measured while changing the position of the open-ear earphone. 装着位置の例を示す図。FIG. 11 is a diagram showing an example of a mounting position. 第一実施形態に係る位置推定装置の機能ブロック図。FIG. 1 is a functional block diagram of a position estimation device according to a first embodiment. 第一実施形態に係る位置推定装置の処理フローの例を示す図。FIG. 4 is a diagram showing an example of a processing flow of the position estimation device according to the first embodiment. 本手法を適用するコンピュータの構成例を示す図。FIG. 13 is a diagram showing an example of the configuration of a computer to which the present technique is applied.
　以下、本発明の実施形態について、説明する。なお、以下の説明に用いる図面では、同じ機能を持つ構成部や同じ処理を行うステップには同一の符号を記し、重複説明を省略する。 Below, an embodiment of the present invention will be described. Note that in the drawings used in the following description, components having the same functions and steps performing the same processing are denoted with the same reference numerals, and duplicate explanations will be omitted.
＜第一実施形態のポイント＞
　本実施形態では、オープンイヤー型イヤホンと耳との間にできる共振周波数を利用して装着位置が正しいかを推定する。 <Key Points of the First Embodiment>
In this embodiment, the resonance frequency between the open-ear earphone and the ear is used to estimate whether the earphone is worn correctly.
　オープンイヤー型イヤホンは、音楽鑑賞だけでなく、スマートフォンやPCとつないで音声通話や音声認識等を実現するために音声取得用のマイクを筐体に持つことが多い。また、音声取得用のマイクだけでなく、ノイズキャンセリングやエコーキャンセリング等を実現するために環境音取得用のマイクを筐体に持つことも多い。本実施形態に係るオープンイヤー型イヤホンも同様に、スピーカとマイクを含むものとする。 Open-ear earphones often have a microphone for voice capture in the housing, so that they can be used not only for listening to music, but also for voice calls and voice recognition when connected to a smartphone or PC. In addition to the microphone for voice capture, the housing often also has a microphone for capturing environmental sounds in order to achieve noise cancellation, echo cancellation, etc. Similarly, the open-ear earphones according to this embodiment are considered to include a speaker and a microphone.
　本実施形態では、耳とオープンイヤー型イヤホンの筐体とが形成する空間の容積に応じて、共振周波数が変化するという現象を利用して、オープンイヤー型イヤホンの耳への装着位置が正しいかを推定する。 In this embodiment, the phenomenon in which the resonant frequency changes depending on the volume of the space formed between the ear and the housing of the open-ear earphone is used to estimate whether the open-ear earphone is correctly placed on the ear.
　例えば、オープンイヤー型イヤホンに含まれるスピーカから所定の信号を再生し、再生された音をオープンイヤー型イヤホンに含まれるマイクで収音する。収音した音響信号の周波数特性から耳と筐体との間の空間で生じる共振周波数を求め、求めた共振周波数からオープンイヤー型イヤホンの装着位置がいつもの装着位置(適切な装着位置)か、いつもの装着位置とは異なる装着位置(不適切な装着位置)かを推定する。 For example, a specific signal is played from a speaker included in the open-ear earphones, and the played sound is picked up by a microphone included in the open-ear earphones. The resonant frequency that occurs in the space between the ear and the housing is found from the frequency characteristics of the picked-up acoustic signal, and from the found resonant frequency it is estimated whether the open-ear earphones are worn in the usual position (appropriate wearing position) or in a position different from the usual position (inappropriate wearing position).
　耳とオープンイヤー型イヤホンの筐体とが形成する空間の容積に応じて、共振周波数が変化することについて説明する。シミュレーションにより、空間の容積と共振周波数との関係を求めた。図１はシミュレーションの状況を説明するための図であり、図２は空間の容積と共振周波数との関係を示す図である。このシミュレーションでは、オープンイヤー型イヤホンの筐体１０の位置を変更することで、空間２０の容積を変更する。このシミュレーションでは、200mm3毎に容積を変更し、600mm3～1400mm3で周波数特性を求めた。シミュレーションでは、鼓膜位置での音圧レベルと筐体背面側150mm位置での音圧レベルを求めた。なお、筐体背面はイヤホンが装着される面とは反対の面であり、筐体背面側150mm位置とは、筐体の中心から見て筐体背面方向に筐体背面から150mm離れた位置である。 The following describes how the resonant frequency changes depending on the volume of the space formed by the ear and the housing of the open-ear type earphone. The relationship between the volume of the space and the resonant frequency was obtained by simulation. FIG. 1 is a diagram for explaining the situation of the simulation, and FIG. 2 is a diagram showing the relationship between the volume of the space and the resonant frequency. In this simulation, the volume of the space 20 is changed by changing the position of the housing 10 of the open-ear type earphone. In this simulation, the volume is changed every 200 mm 3 , and the frequency characteristics are obtained at 600 mm 3 to 1400 mm 3. In the simulation, the sound pressure level at the eardrum position and the sound pressure level at a position 150 mm from the rear side of the housing are obtained. Note that the rear side of the housing is the surface opposite to the surface on which the earphone is worn, and the position 150 mm from the rear side of the housing is a position 150 mm away from the rear side of the housing in the direction of the rear side of the housing as viewed from the center of the housing.
　図２に示すように、鼓膜位置でも筐体背面側150mm位置でも、10khz-11khzの帯域で現れているピークの周波数の位置がシフトしていた。なお、空間が小さくなるほどピークの周波数の位置が高域にシフトする。本実施形態では、このピークの周波数の位置を観測することで普段とは異なる位置に装着されているのかを判別する。 As shown in Figure 2, the position of the peak frequency that appears in the 10 kHz-11 kHz band shifted whether it was at the eardrum position or 150 mm from the rear of the housing. Note that the smaller the space, the more the position of the peak frequency shifts to a higher frequency. In this embodiment, by observing the position of this peak frequency, it is possible to determine whether the headphones are being worn in a different position than usual.
　共振周波数の取得方法としては、TSP法により、インパルス応答を求め、インパルス応答から共振周波数を求める。例えば、オープンイヤー型イヤホンに含まれるスピーカからTSP(Time Stretched Pulse)信号を再生し、オープンイヤー型イヤホンに含まれるマイクで再生した信号を収音する。収音した信号に時間反転TSP信号を畳み込むことで引き延ばされた信号を圧縮(インパルス化)してインパルス応答を求める。 The resonant frequency is obtained by calculating the impulse response using the TSP method, and then calculating the resonant frequency from the impulse response. For example, a TSP (Time Stretched Pulse) signal is played from a speaker included in an open-ear earphone, and the played signal is picked up by a microphone included in the open-ear earphone. The stretched signal is compressed (impulse-converted) by convolving the time-reversed TSP signal with the picked-up signal to find the impulse response.
　図３はオープンイヤー型イヤホンの装着位置を変えながら測定した周波数特性を示す。図４は装着位置の例を示す図である。装着位置１，３は、いつもの装着位置とは異なる位置(不適切な装着位置)にオープンイヤー型イヤホンが装着された場合の例を示し、装着位置２，４は、いつもの装着位置と同じ位置(適切な装着位置)にオープンイヤー型イヤホンが装着された場合の例を示す。 Figure 3 shows the frequency characteristics measured while changing the wearing position of the open-ear type earphone. Figure 4 shows examples of wearing positions. Wearing positions 1 and 3 show examples when the open-ear type earphone is worn in a position different from the usual wearing position (inappropriate wearing position), and wearing positions 2 and 4 show examples when the open-ear type earphone is worn in the same position as the usual wearing position (appropriate wearing position).
　図３に示すように、適切な装着位置にオープンイヤー型イヤホンが装着された場合、同じ周波数にピークがあり、不適切な装着位置にオープンイヤー型イヤホンが装着された場合、ピークの周波数が異なっている。このことから、耳とオープンイヤー型イヤホンの間で生じる共振周波数を確認することで、適切な装着位置なのか、不適切な装着位置なのかを推定することができる。 As shown in Figure 3, when the open-ear earphones are worn in the appropriate wearing position, there is a peak at the same frequency, but when the open-ear earphones are worn in an inappropriate wearing position, the peak frequency is different. From this, by checking the resonance frequency that occurs between the ear and the open-ear earphones, it is possible to estimate whether the wearing position is appropriate or inappropriate.
　このような構成によって、特殊なセンサーなどを用いることなく、一般的なオープンイヤー型イヤホンに含まれるスピーカとマイクから装着位置が正しいかを推定することができ、オープンイヤー型イヤホンで生じる装着位置が適切な装着位置に定まらない問題を解決することができる。特に耳掛け型のオープンイヤー型イヤホンの場合には、装着位置がズレやすく、本願発明が有用である。 With this configuration, it is possible to estimate whether the wearing position is correct from the speaker and microphone included in typical open-ear earphones without using special sensors, etc., and it is possible to solve the problem of open-ear earphones not being able to be worn in the appropriate position. This invention is particularly useful for open-ear earphones that are attached behind the ears, where the wearing position is easily shifted.
＜第一実施形態＞
　図５は第一実施形態に係る位置推定装置の機能ブロック図を、図６はその処理フローを示す。 First Embodiment
FIG. 5 is a functional block diagram of the position estimation device according to the first embodiment, and FIG. 6 shows the processing flow thereof.
　位置推定装置は、生成部１１０と、記憶部１３０と、推定部１４０とを含む。 The position estimation device includes a generation unit 110, a storage unit 130, and an estimation unit 140.
　位置推定装置は、オープンイヤー型イヤホン９０と有線または無線により通信可能に接続されており、オープンイヤー型イヤホン９０に含まれるスピーカ９１で再生される所定の信号を出力する。さらに、位置推定装置は、スピーカ９１で再生された所定の信号をオープンイヤー型イヤホン９０に含まれるマイク９２で収音して得られる収音信号を入力とする。 The position estimation device is connected to the open-ear earphones 90 so as to be able to communicate with them via wired or wireless communication, and outputs a predetermined signal that is reproduced by a speaker 91 included in the open-ear earphones 90. Furthermore, the position estimation device receives as input a picked-up signal that is obtained by picking up the predetermined signal reproduced by the speaker 91 with a microphone 92 included in the open-ear earphones 90.
　位置推定装置は、収音信号からオープンイヤー型イヤホンの装着位置を推定し、推定結果を出力する。 The position estimation device estimates the wearing position of the open-ear earphones from the picked-up sound signal and outputs the estimation result.
　位置推定装置は、例えば、中央演算処理装置（CPU: Central Processing Unit）、主記憶装置（RAM: Random Access Memory）などを有する公知又は専用のコンピュータに特別なプログラムが読み込まれて構成された特別な装置である。位置推定装置は、例えば、中央演算処理装置の制御のもとで各処理を実行する。位置推定装置に入力されたデータや各処理で得られたデータは、例えば、主記憶装置に格納され、主記憶装置に格納されたデータは必要に応じて中央演算処理装置へ読み出されて他の処理に利用される。位置推定装置の各処理部は、少なくとも一部が集積回路等のハードウェアによって構成されていてもよい。位置推定装置が備える各記憶部は、例えば、RAM（Random Access Memory）などの主記憶装置、またはリレーショナルデータベースやキーバリューストアなどのミドルウェアにより構成することができる。ただし、各記憶部は、必ずしも位置推定装置がその内部に備える必要はなく、ハードディスクや光ディスクもしくはフラッシュメモリ（Flash Memory）のような半導体メモリ素子により構成される補助記憶装置により構成し、位置推定装置の外部に備える構成としてもよい。 The location estimation device is a special device configured by loading a special program into a publicly known or dedicated computer having, for example, a central processing unit (CPU), a main memory (RAM), etc. The location estimation device executes each process under the control of the central processing unit, for example. Data input to the location estimation device and data obtained by each process are stored in, for example, the main memory, and the data stored in the main memory is read out to the central processing unit as necessary and used for other processes. At least a part of each processing unit of the location estimation device may be configured with hardware such as an integrated circuit. Each storage unit of the location estimation device may be configured with, for example, a main storage device such as a RAM (Random Access Memory), or middleware such as a relational database or a key-value store. However, each storage unit does not necessarily have to be provided inside the location estimation device, and may be configured with an auxiliary storage device configured with a semiconductor memory element such as a hard disk, optical disk, or flash memory, and may be configured to be provided outside the location estimation device.
　推定処理は、装着位置を推定する前に行う準備段階と推定段階とからなる。まず、準備段階について説明する。 The estimation process consists of a preparation stage, which is carried out before estimating the mounting position, and an estimation stage. First, the preparation stage will be explained.
＜準備段階＞
　まず、オープンイヤー型イヤホンの利用者は、オープンイヤー型イヤホンを耳介の理想的な位置(適切な装着位置)に装着する。なお、理想的な位置に装着されているか否かの判断は、利用者が主観的に判断してもよいし、専門的な知識を持つ第三者が装着位置を確認して客観的に判断してもよい。 <Preparation stage>
First, a user of the open-ear type earphones wears the open-ear type earphones in the ideal position (appropriate wearing position) of the auricle. Whether or not the earphones are worn in the ideal position may be judged subjectively by the user, or may be judged objectively by a third party with specialized knowledge who checks the wearing position.
　生成部１１０は、スピーカ９１で再生される所定の信号を生成し（Ｓ１０１）、スピーカ９１に出力する。例えば、所定の信号は、TSP信号である。 The generating unit 110 generates a predetermined signal to be played by the speaker 91 (S101) and outputs the signal to the speaker 91. For example, the predetermined signal is a TSP signal.
　オープンイヤー型イヤホンを利用者の耳の理想的な位置に装着した状態で、所定の信号をスピーカ９１で再生する（Ｓ１０３）。 With the open-ear earphones placed in the ideal position on the user's ears, a predetermined signal is played through the speaker 91 (S103).
　スピーカ９１で再生した音をマイク９２で収音する（Ｓ１０５）。 The sound played by the speaker 91 is picked up by the microphone 92 (S105).
　推定部１４０は、マイク９２で収音して得られる収音信号を入力とし、収音信号を用いて、利用者の耳とオープンイヤー型イヤホンとで形成された空間の共振周波数f2を得（Ｓ１０９）、記憶部１３０に格納する（Ｓ１１１）。例えば、所定の信号がTSP信号の場合、推定部１４０は、TSP法により、収音信号に時間反転TSP信号を畳み込むことで引き延ばされた信号を圧縮(インパルス化)してインパルス応答を求め、インパルス応答から共振周波数f2を求める。 The estimation unit 140 receives a collected sound signal obtained by collecting sound with the microphone 92 as an input, obtains the resonance frequency f2 of the space formed by the user's ear and the open-ear type earphone using the collected sound signal (S109), and stores the frequency in the storage unit 130 (S111). For example, when the predetermined signal is a TSP signal, the estimation unit 140 obtains an impulse response by compressing (impulsing) the extended signal by convolving the time-reversed TSP signal with the collected sound signal using the TSP method, and obtains the resonance frequency f2 from the impulse response.
　準備段階は、以上の処理Ｓ１０１～Ｓ１１１を含む。次に推定段階について説明する。 The preparation stage includes the above steps S101 to S111. Next, the estimation stage will be explained.
＜推定段階＞
　まず、オープンイヤー型イヤホンの利用者は、オープンイヤー型イヤホンを耳介に装着する。 <Estimation stage>
First, a user of the open-ear type earphones places the open-ear type earphones on the auricle.
　生成部１１０は、スピーカ９１で再生される所定の信号を生成し（Ｓ２０１）、スピーカ９１に出力する。例えば、所定の信号は、準備段階で用いた信号と同様の信号を用いる。 The generating unit 110 generates a predetermined signal to be played by the speaker 91 (S201) and outputs it to the speaker 91. For example, the predetermined signal is the same as the signal used in the preparation stage.
　オープンイヤー型イヤホンを利用者の耳に装着した状態で、所定の信号をスピーカ９１で再生する（Ｓ２０３）。 With the open-ear earphones attached to the user's ears, a predetermined signal is played through the speaker 91 (S203).
　スピーカ９１で再生した音をマイク９２で収音する（Ｓ２０５）。 The sound played by the speaker 91 is picked up by the microphone 92 (S205).
　推定部２４０は、マイク９２で収音して得られる収音信号を入力とし、収音信号を用いて、利用者の耳とオープンイヤー型イヤホンとで形成された空間の共振周波数f1を得る（Ｓ２０９）。なお、収音信号から共振周波数を得る方法は準備段階と同じ方法を用いる。推定部２４０は、記憶部１３０に格納されている共振周波数f2を参照し、共振周波数f1とf2とが一致する場合には（Ｓ２１１のYES）、オープンイヤー型イヤホンが利用者の耳の理想的な位置に装着されていると推定し、装着位置が適切であることを示す推定結果を出力する（Ｓ２１３）。共振周波数f1とf2とが一致しない場合には（Ｓ２１１のNO）、推定部２４０は、オープンイヤー型イヤホンが利用者の耳の理想的な位置に装着されていないと推定し、装着位置が不適切であることを示す推定結果を出力する（Ｓ２１５）。なお、共振周波数f1とf2とが一致するとは、完全に一致する場合だけでなく、共振周波数f1とf2との差分が所定の範囲内の場合も含む。実際の利用に際しては、オープンイヤー型イヤホンは、適切な位置に装着する場合であっても、その位置は微妙に変化し、その変化に応じて共振周波数も微妙に変化する。よって、理想的な位置に装着されていると見做しうる範囲内に共振周波数f1とf2との差分が入る場合に、共振周波数f1とf2とが一致すると見做す。 The estimation unit 240 receives the collected sound signal obtained by collecting sound with the microphone 92 as an input, and obtains the resonance frequency f 1 of the space formed by the user's ear and the open-ear earphone using the collected sound signal (S209). The method of obtaining the resonance frequency from the collected sound signal is the same as that in the preparation stage. The estimation unit 240 refers to the resonance frequency f 2 stored in the storage unit 130, and if the resonance frequencies f 1 and f 2 match (YES in S211), it estimates that the open-ear earphone is attached to the ideal position of the user's ear, and outputs an estimation result indicating that the wearing position is appropriate (S213). If the resonance frequencies f 1 and f 2 do not match (NO in S211), the estimation unit 240 estimates that the open-ear earphone is not attached to the ideal position of the user's ear, and outputs an estimation result indicating that the wearing position is inappropriate (S215). Note that the resonance frequencies f 1 and f 2 match not only when they match completely, but also when the difference between the resonance frequencies f 1 and f 2 is within a predetermined range. In actual use, even if the open-ear type earphone is worn in an appropriate position, the position may change slightly, and the resonant frequency may change slightly accordingly. Therefore, when the difference between the resonant frequencies f1 and f2 falls within the range that can be considered to be the ideal position, the resonant frequencies f1 and f2 are considered to be the same.
＜実施例＞
　本実施例では、位置推定装置をスマートフォン上に実装する。 <Example>
In this embodiment, the location estimation device is implemented on a smartphone.
　まず、準備段階について説明する。 First, let me explain the preparation stage.
　位置推定装置を実装したスマートフォンとオープンイヤー型イヤホン９０とが有線または無線により通信可能に接続されると、自動的に、または、利用者の操作により、位置推定用のアプリケーションを起動し、準備段階の処理を実行する。 When a smartphone equipped with a position estimation device and the open-ear earphones 90 are connected to each other via wired or wireless communication, a position estimation application is started automatically or by user operation, and a preparatory process is performed.
　アプリケーションを起動すると、位置推定装置は、スマートフォンのタッチパネルにオープンイヤー型イヤホン９０を適切な位置に装着し、所定の信号を再生することを促すメッセージを表示する。例えば、位置推定装置は、「オープンイヤー型イヤホン９０を適切な位置に装着し、「再生」ボタンをタップして下さい。」とのメッセージとともに再生ボタンを表示する。 When the application is launched, the position estimation device displays a message on the smartphone's touch panel encouraging the user to place the open-ear earphones 90 in an appropriate position and play a specific signal. For example, the position estimation device displays a play button along with the message "Put the open-ear earphones 90 in an appropriate position and tap the 'Play' button."
　所定の信号を再生することを意図する操作が行われると（例えば、「再生」ボタンがタップされると）、位置推定装置は、所定の信号を生成し（Ｓ１０１）、スピーカ９１で再生する（Ｓ１０３）。さらに、スピーカ９１で再生した音をマイク９２で収音し（Ｓ１０５）、位置推定装置は、収音信号を用いて、共振周波数f2を得（Ｓ１０９）、記憶部１３０に格納する（Ｓ１１１）。得られた共振周波数f2が適切な範囲内にある場合、位置推定装置は、スマートフォンのタッチパネルにスマートフォンのタッチパネルに位置推定の準備が完了したことを示すメッセージを表示する。例えば、位置推定装置は、「オープンイヤー型イヤホン９０の適切な位置が登録されました。」とのメッセージを表示する。得られた共振周波数f2が適切な範囲内にない場合、位置推定装置は、スマートフォンのタッチパネルにスマートフォンのタッチパネルに位置推定が完了していないことを示すメッセージを表示する。例えば、位置推定装置は、「オープンイヤー型イヤホン９０が適切な位置に装着されていません。適切な位置に装着しなおし、再度、「再生」ボタンをタップして下さい」とのメッセージとともに再生ボタンを表示し、上述の処理Ｓ１０１～Ｓ１１１を繰り返す。なお、共振周波数f2の適切な範囲は、様々な耳の形状や大きさを考慮して、実験またはシミュレーションにより予め取得しておけばよい。 When an operation intended to play a predetermined signal is performed (for example, when the "play" button is tapped), the position estimation device generates a predetermined signal (S101) and plays it on the speaker 91 (S103). Furthermore, the sound played on the speaker 91 is collected by the microphone 92 (S105), and the position estimation device obtains a resonance frequency f2 using the collected sound signal (S109) and stores it in the storage unit 130 (S111). If the obtained resonance frequency f2 is within an appropriate range, the position estimation device displays a message on the touch panel of the smartphone indicating that preparation for position estimation is complete. For example, the position estimation device displays a message saying "The appropriate position of the open-ear type earphone 90 has been registered." If the obtained resonance frequency f2 is not within the appropriate range, the position estimation device displays a message on the touch panel of the smartphone indicating that position estimation is not complete. For example, the position estimation device displays a play button along with a message saying "The open-ear type earphone 90 is not attached in an appropriate position. Please attach it in an appropriate position and tap the 'Play' button again," and repeats the above-mentioned processes S101 to S111. Note that the appropriate range of the resonance frequency f2 may be obtained in advance by experiment or simulation, taking into account various ear shapes and sizes.
　次に、推定段階ついて説明する。 Next, we will explain the estimation stage.
　位置推定装置を実装したスマートフォンとオープンイヤー型イヤホン９０とが有線または無線により通信可能に接続されると、自動的に、または、利用者の操作により、位置推定用のアプリケーションを起動し、推定段階の処理を実行する。 When a smartphone equipped with a position estimation device and the open-ear earphones 90 are connected to each other via wired or wireless communication, a position estimation application is started automatically or by user operation, and the estimation stage processing is performed.
　アプリケーションが起動すると、位置推定装置は、自動的に所定の信号を生成し（Ｓ２０１）、スピーカ９１で再生する（Ｓ２０３）。さらに、スピーカ９１で再生した音をマイク９２で収音し（Ｓ２０５）、収音信号を用いて、共振周波数f1を得る（Ｓ２０９）。得られた共振周波数f1と記憶部１３０に格納されている共振周波数f2とが一致する場合には（Ｓ２１１のYES）、位置推定装置は、オープンイヤー型イヤホン９０が適切な位置に装着されていることを示すメッセージをスマートフォンのタッチパネルに表示してもよいし、何もメッセージを表示しなくともよい（この場合、何もメッセージが表示されないことがオープンイヤー型イヤホン９０が適切な位置に装着されていることを意味する）。共振周波数f1とf2とが一致しない場合には（Ｓ２１１のNO）、位置推定装置は、スマートフォンのタッチパネルにオープンイヤー型イヤホン９０が適切な位置に装着されていないことを示すメッセージとともに、利用者にオープンイヤー型イヤホン９０を適切な位置に装着しなおすことを促すメッセージを表示する。例えば、位置推定装置は、「オープンイヤー型イヤホン９０が適切な位置に装着されていません。適切な位置に装着しなおし、「完了」ボタンをタップして下さい。」とのメッセージとともに完了ボタンを表示する。「完了」ボタンがタップされると、上述の処理Ｓ２０１～Ｓ２１１を繰り返す。 When the application is started, the position estimation device automatically generates a predetermined signal (S201) and plays it on the speaker 91 (S203). Furthermore, the sound played on the speaker 91 is collected by the microphone 92 (S205), and the collected sound signal is used to obtain the resonance frequency f1 (S209). If the obtained resonance frequency f1 matches the resonance frequency f2 stored in the storage unit 130 (YES in S211), the position estimation device may display a message indicating that the open-ear type earphone 90 is attached in an appropriate position on the touch panel of the smartphone, or may not display any message (in this case, the absence of any message means that the open-ear type earphone 90 is attached in an appropriate position). If the resonance frequencies f1 and f2 do not match (NO in S211), the position estimation device displays a message indicating that the open-ear type earphone 90 is not attached in an appropriate position on the touch panel of the smartphone, as well as a message urging the user to reattach the open-ear type earphone 90 to an appropriate position. For example, the position estimation device displays a completion button along with a message saying, "The open-ear type earphones 90 are not attached in an appropriate position. Please put them back in an appropriate position and tap the 'Done'button." When the 'Done' button is tapped, the above-mentioned processes S201 to S211 are repeated.
＜効果＞
　以上の構成により、特別な装置を用いることなく、スピーカとマイクとを含むオープンイヤー型イヤホンの耳への装着位置が正しいか否かを推定することができる。 ＜Effects＞
With the above configuration, it is possible to estimate whether an open-ear type earphone including a speaker and a microphone is correctly placed on the ear without using any special device.
＜変形例１＞
　本実施形態では、所定の信号を生成部１１０で生成しているが、予め生成しておいた所定の信号を図示しない記憶部に記憶しておき、スピーカ９１に出力する構成としてもよい。この場合、位置推定装置は、生成部１１０を含まなくともよい。 <Modification 1>
In this embodiment, the predetermined signal is generated by the generating unit 110, but a configuration may be adopted in which a predetermined signal generated in advance is stored in a storage unit (not shown) and output to the speaker 91. In this case, the position estimation device does not need to include the generating unit 110.
＜その他の変形例＞
　本発明は上記の実施形態及び変形例に限定されるものではない。例えば、上述の各種の処理は、記載に従って時系列に実行されるのみならず、処理を実行する装置の処理能力あるいは必要に応じて並列的にあるいは個別に実行されてもよい。その他、本発明の趣旨を逸脱しない範囲で適宜変更が可能である。 <Other Modifications>
The present invention is not limited to the above-mentioned embodiment and modified examples. For example, the above-mentioned various processes may be executed not only in chronological order as described, but also in parallel or individually depending on the processing capacity of the device executing the processes or as necessary. In addition, appropriate modifications are possible within the scope of the present invention.
＜プログラム及び記録媒体＞
　上述の各種の処理は、図７に示すコンピュータ２０００の記録部２０２０に、上記方法の各ステップを実行させるプログラムを読み込ませ、制御部２０１０、入力部２０３０、出力部２０４０、表示部２０５０などに動作させることで実施できる。 <Program and recording medium>
The various processes described above can be implemented by loading a program that executes each step of the above method into the recording unit 2020 of the computer 2000 shown in FIG. 7, and operating the control unit 2010, input unit 2030, output unit 2040, display unit 2050, etc.
　この処理内容を記述したプログラムは、コンピュータで読み取り可能な記録媒体に記録しておくことができる。コンピュータで読み取り可能な記録媒体としては、例えば、磁気記録装置、光ディスク、光磁気記録媒体、半導体メモリ等どのようなものでもよい。 The program describing this processing can be recorded on a computer-readable recording medium. Examples of computer-readable recording media include magnetic recording devices, optical disks, magneto-optical recording media, and semiconductor memories.
　また、このプログラムの流通は、例えば、そのプログラムを記録したＤＶＤ、ＣＤ－ＲＯＭ等の可搬型記録媒体を販売、譲渡、貸与等することによって行う。さらに、このプログラムをサーバコンピュータの記憶装置に格納しておき、ネットワークを介して、サーバコンピュータから他のコンピュータにそのプログラムを転送することにより、このプログラムを流通させる構成としてもよい。 The program may be distributed, for example, by selling, transferring, or lending portable recording media such as DVDs or CD-ROMs on which the program is recorded. Furthermore, the program may be distributed by storing the program in a storage device of a server computer and transferring the program from the server computer to other computers via a network.
　このようなプログラムを実行するコンピュータは、例えば、まず、可搬型記録媒体に記録されたプログラムもしくはサーバコンピュータから転送されたプログラムを、一旦、自己の記憶装置に格納する。そして、処理の実行時、このコンピュータは、自己の記録媒体に格納されたプログラムを読み取り、読み取ったプログラムに従った処理を実行する。また、このプログラムの別の実行形態として、コンピュータが可搬型記録媒体から直接プログラムを読み取り、そのプログラムに従った処理を実行することとしてもよく、さらに、このコンピュータにサーバコンピュータからプログラムが転送されるたびに、逐次、受け取ったプログラムに従った処理を実行することとしてもよい。また、サーバコンピュータから、このコンピュータへのプログラムの転送は行わず、その実行指示と結果取得のみによって処理機能を実現する、いわゆるＡＳＰ（Application Service Provider）型のサービスによって、上述の処理を実行する構成としてもよい。なお、本形態におけるプログラムには、電子計算機による処理の用に供する情報であってプログラムに準ずるもの（コンピュータに対する直接の指令ではないがコンピュータの処理を規定する性質を有するデータ等）を含むものとする。 A computer that executes such a program, for example, first stores in its own storage device the program recorded on a portable recording medium or the program transferred from a server computer. Then, when executing a process, the computer reads the program stored on its own recording medium and executes the process according to the read program. As another execution form of the program, the computer may read the program directly from the portable recording medium and execute the process according to the program, or may execute the process according to the received program each time a program is transferred from the server computer to the computer. The above-mentioned process may also be executed by a so-called ASP (Application Service Provider) type service that does not transfer the program from the server computer to the computer, but realizes the processing function only by issuing an execution instruction and obtaining the results. Note that the program in this form includes information used for processing by an electronic computer that is equivalent to a program (such as data that is not a direct command to the computer but has properties that specify the processing of the computer).
　また、この形態では、コンピュータ上で所定のプログラムを実行させることにより、本装置を構成することとしたが、これらの処理内容の少なくとも一部をハードウェア的に実現することとしてもよい。 In addition, in this embodiment, the device is configured by executing a specific program on a computer, but at least a portion of the processing may be realized by hardware.

Claims (3)

  1. 　利用者の耳とオープンイヤー型イヤホンとで形成された空間の共振周波数f1を記憶する記憶部と、
    　前記オープンイヤー型イヤホンを利用者が装着した状態で、所定の信号を前記オープンイヤー型イヤホンに含まれるスピーカで再生したときに前記オープンイヤー型イヤホンに含まれるマイクで収音して得られる収音信号を用いて、前記利用者の耳と前記オープンイヤー型イヤホンとで形成された空間の共振周波数f2を得、共振周波数f1とf2とが一致する場合には、前記オープンイヤー型イヤホンが利用者の耳の理想的な位置に装着されていると推定する推定部とを含み、
    　前記共振周波数f1は、前記オープンイヤー型イヤホンを前記利用者の耳の理想的な位置に装着した状態で、前記所定の信号を前記スピーカで再生したときに前記マイクで収音して得られる収音信号を用いて、得られるものである、
    　位置推定装置。     A storage unit that stores a resonant frequency f1 of a space formed by the user's ear and the open-ear type earphone;
    an estimation unit that, when a user wears the open-ear type earphone, obtains a resonance frequency f2 of a space formed by the user's ear and the open-ear type earphone using a picked-up signal obtained by playing a predetermined signal through a speaker included in the open-ear type earphone and collecting the sound with a microphone included in the open-ear type earphone, and estimates that the open-ear type earphone is worn in an ideal position on the user's ear when the resonance frequencies f1 and f2 match;
    The resonant frequency f1 is obtained by using a pickup signal obtained by picking up the predetermined signal with the microphone when the open-ear type earphone is worn at an ideal position on the user's ear and the predetermined signal is reproduced with the speaker.
    Location estimation device.
  2. 　利用者の耳とオープンイヤー型イヤホンとで形成された空間の共振周波数f1を記憶する記憶ステップと、
    　前記オープンイヤー型イヤホンを利用者が装着した状態で、所定の信号を前記オープンイヤー型イヤホンに含まれるスピーカで再生したときに前記オープンイヤー型イヤホンに含まれるマイクで収音して得られる収音信号を用いて、前記利用者の耳と前記オープンイヤー型イヤホンとで形成された空間の共振周波数f2を得、共振周波数f1とf2とが一致する場合には、前記オープンイヤー型イヤホンが利用者の耳の理想的な位置に装着されていると推定する推定ステップとを含み、
    　前記共振周波数f1は、前記オープンイヤー型イヤホンを前記利用者の耳の理想的な位置に装着した状態で、前記所定の信号を前記スピーカで再生したときに前記マイクで収音して得られる収音信号を用いて、得られるものである、
    　位置推定方法。     A storage step of storing a resonant frequency f1 of a space formed by the user's ear and the open-ear type earphone;
    and obtaining a resonance frequency f2 of a space formed by the user's ear and the open-ear type earphone using a picked-up sound signal obtained by playing a predetermined signal through a speaker included in the open-ear type earphone while the user is wearing the open-ear type earphone, and estimating that the open-ear type earphone is worn in an ideal position on the user's ear if the resonance frequencies f1 and f2 match;
    The resonant frequency f1 is obtained by using a pickup signal obtained by picking up the predetermined signal with the microphone when the open-ear type earphone is worn in an ideal position on the user's ear and the predetermined signal is reproduced with the speaker.
    Location estimation methods.
  3. 　請求項１の位置推定装置としてコンピュータを機能させるためのプログラム。 A program for causing a computer to function as the position estimation device of claim 1.
PCT/JP2022/039936 2022-10-26 2022-10-26 Position estimation device, position estimation method, and program WO2024089804A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019062342A (en) * 2017-09-26 2019-04-18 株式会社Ｊｖｃケンウッド Signal processing apparatus, signal processing method, and program
WO2022118526A1 (en) * 2020-12-04 2022-06-09 パナソニックＩｐマネジメント株式会社 Earphone and fit adjustment method
JP2022145772A (en) * 2017-09-26 2022-10-04 カシオ計算機株式会社 Acoustic apparatus, control method of acoustic apparatus, and control program

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019062342A (en) * 2017-09-26 2019-04-18 株式会社Ｊｖｃケンウッド Signal processing apparatus, signal processing method, and program
JP2022145772A (en) * 2017-09-26 2022-10-04 カシオ計算機株式会社 Acoustic apparatus, control method of acoustic apparatus, and control program
WO2022118526A1 (en) * 2020-12-04 2022-06-09 パナソニックＩｐマネジメント株式会社 Earphone and fit adjustment method

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