JP2017147636A - Sound signal adjustment device, sound signal adjustment program and acoustic apparatus - Google Patents

Sound signal adjustment device, sound signal adjustment program and acoustic apparatus Download PDF

Info

Publication number
JP2017147636A
JP2017147636A JP2016028803A JP2016028803A JP2017147636A JP 2017147636 A JP2017147636 A JP 2017147636A JP 2016028803 A JP2016028803 A JP 2016028803A JP 2016028803 A JP2016028803 A JP 2016028803A JP 2017147636 A JP2017147636 A JP 2017147636A
Authority
JP
Japan
Prior art keywords
sound signal
sound
characteristic
frequency
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2016028803A
Other languages
Japanese (ja)
Other versions
JP6690285B2 (en
Inventor
厚史 田代
Atsushi Tashiro
厚史 田代
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP2016028803A priority Critical patent/JP6690285B2/en
Publication of JP2017147636A publication Critical patent/JP2017147636A/en
Application granted granted Critical
Publication of JP6690285B2 publication Critical patent/JP6690285B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Circuit For Audible Band Transducer (AREA)

Abstract

PROBLEM TO BE SOLVED: To achieve adjustment to a sound signal with hearing suppressed without giving discomfort to a surrounding listener.SOLUTION: The tone signal adjustment device includes: acoustic feeling characteristic information estimation means for estimating an acoustic feeling characteristic of an input environmental sound signal; sound signal characteristic adjustment means for adjusting a frequency characteristic of an input sound signal on the basis of the acoustic feeling characteristic of environmental sound; and environmental characteristic adjustment means for giving a gain based on the acoustic feeling characteristic of environmental sound to the whole of a frequency characteristic component of a sound signal adjusted by the sound signal characteristic adjustment means.SELECTED DRAWING: Figure 1

Description

本発明は、音信号調整装置、音信号調整プログラム及び音響装置に関し、例えば、聴収を抑制した音信号に調整する音信号調整装置、音信号調整プログラム及び音響装置に適用し得るものである。   The present invention relates to a sound signal adjustment device, a sound signal adjustment program, and a sound device, and can be applied to, for example, a sound signal adjustment device, a sound signal adjustment program, and a sound device that adjust a sound signal with suppressed hearing.

従来、音声出力を拡散させない方法として、特許文献１に記載のマスキング音を出力して周囲の受聴者への聴取を抑制させる方法がある。特許文献１の記載技術は、マスキングすべき出力音源の周囲にマスキング音を出力し、周囲の受聴者による出力音源の受聴を妨げるようにしている。   Conventionally, as a method of not diffusing sound output, there is a method of suppressing listening to surrounding listeners by outputting a masking sound described in Patent Document 1. The technology described in Patent Document 1 outputs a masking sound around an output sound source to be masked to prevent the surrounding listener from listening to the output sound source.

特開平６−１７５６６６号公報JP-A-6-175666

しかし、従来技術では、周囲の受聴者への聴取を抑制する方法として、マスキング音を発生させている。この場合、周囲の受聴者に不要な音声を聴取させることになり、周囲受聴者にとっては不快感が生じ得る。   However, in the prior art, a masking sound is generated as a method for suppressing listening to surrounding listeners. In this case, unnecessary sounds can be heard by the surrounding listeners, which may cause discomfort to the surrounding listeners.

そこで、周囲の受聴者に不快感を与えることなく、聴取を抑制した音信号に調整する音信号調整装置、音信号調整プログラム及び音響装置が求められている。   Therefore, there is a need for a sound signal adjustment device, a sound signal adjustment program, and an audio device that adjust to a sound signal that suppresses listening without causing discomfort to surrounding listeners.

第１の本発明に係る音信号調整装置は、（１）入力された環境音信号の聴感特性を推定する聴感特性情報推定手段と、（２）環境音の聴感特性に基づいて、入力された音信号の周波数特性を調整する音信号特性調整手段と、（３）環境音信号の聴覚特性に基づく利得を、音信号特性調整手段により調整された音信号の周波数特性成分の全体に対して与える環境特性調整手段とを備えること特徴とする。   The sound signal adjustment device according to the first aspect of the present invention is (1) an audibility characteristic information estimating means for estimating an audibility characteristic of an input environmental sound signal, and (2) an input based on the audibility characteristic of the environmental sound. A sound signal characteristic adjusting means for adjusting the frequency characteristic of the sound signal; and (3) giving a gain based on the auditory characteristic of the environmental sound signal to the entire frequency characteristic component of the sound signal adjusted by the sound signal characteristic adjusting means. And environmental characteristic adjusting means.

第２の本発明に係る音信号調整プログラムは、コンピュータを、（１）入力された環境音信号の聴感特性を推定する聴感特性情報推定手段と、（２）環境音の聴感特性に基づいて、入力された音信号の周波数特性を調整する音信号特性調整手段と、（３）環境音信号の聴覚特性に基づく利得を、音信号特性調整手段により調整された音信号の周波数特性成分の全体に対して与える環境特性調整手段として機能させること特徴とする。   The sound signal adjustment program according to the second aspect of the present invention is based on (1) audibility characteristic information estimation means for estimating an audibility characteristic of an input environmental sound signal, and (2) an audibility characteristic of the environmental sound. A sound signal characteristic adjusting means for adjusting the frequency characteristic of the input sound signal; and (3) a gain based on the auditory characteristic of the environmental sound signal is added to the entire frequency characteristic component of the sound signal adjusted by the sound signal characteristic adjusting means. It is characterized by functioning as an environmental characteristic adjusting means to be given.

第３本発明に係る音響装置は、（１）環境音信号を取得するマイクロフォンと、（２）マイクロフォンから環境音信号を取得して、入力された音信号を調整する第１の本発明に記載の音信号調整装置である音信号調整手段と、（３）音信号調整手段により調整された音信号を出力するスピーカとを備えることを特徴とする。   An acoustic device according to a third aspect of the present invention is (1) a microphone that acquires an environmental sound signal, and (2) an environmental sound signal that is acquired from the microphone and adjusts the input sound signal. And (3) a speaker that outputs a sound signal adjusted by the sound signal adjusting means.

本発明によれば、周囲の受聴者に不快感を与えることなく、聴取を抑制できる。   According to the present invention, listening can be suppressed without causing discomfort to surrounding listeners.

実施形態に係る音声拡散抑制装置の構成を示す構成図である。It is a block diagram which shows the structure of the audio | voice diffusion suppression apparatus which concerns on embodiment. 実施形態に係る音声調整装置の内部構成を示すブロック図である。It is a block diagram which shows the internal structure of the audio | voice adjustment apparatus which concerns on embodiment. 実施形態に係る等ラウドネス曲線からラウドネス補正値を算出する方法を説明する説明図である。It is explanatory drawing explaining the method of calculating a loudness correction value from the equal loudness curve which concerns on embodiment. 実施形態に係るラウドネス推定部におけるラウドネス補正値の推定処理を示すフローチャートである。It is a flowchart which shows the estimation process of the loudness correction value in the loudness estimation part which concerns on embodiment. 実施形態に係る特徴量調整部で入出力される信号の周波数特性を説明する説明図である。It is explanatory drawing explaining the frequency characteristic of the signal input / output by the feature-value adjustment part which concerns on embodiment. 実施形態に係る環境特性調整部で入出力される信号の周波数特性を説明する説明図である。It is explanatory drawing explaining the frequency characteristic of the signal input / output in the environmental characteristic adjustment part which concerns on embodiment.

（Ａ）主たる実施形態
本発明に係る音信号調整装置、音信号調整プログラム及び音響装置の実施形態を、図面を参照しながら詳細に説明する。 (A) Main Embodiments Embodiments of a sound signal adjustment device, a sound signal adjustment program, and an audio device according to the present invention will be described in detail with reference to the drawings.

ここで、「音信号」は、音声信号、音響信号等を含む概念である。この実施形態では、音信号が音声信号である場合を例示して説明する。   Here, the “sound signal” is a concept including an audio signal, an acoustic signal, and the like. In this embodiment, a case where the sound signal is an audio signal will be described as an example.

また、この実施形態では、本発明を利用して、音声拡散抑制装置の音声調整装置に適用する場合を例示して説明する。   In this embodiment, a case where the present invention is used and applied to a sound adjustment device of a sound diffusion suppression device will be described as an example.

（Ａ−１）実施形態の構成
図１は、実施形態に係る音声拡散抑制装置１０の構成を示す構成図である。 (A-1) Configuration of Embodiment FIG. 1 is a configuration diagram showing a configuration of a speech diffusion suppression device 10 according to the embodiment.

図１において、音声拡散装置１０は、音声調整装置１００、スピーカ装置２００、マイク装置２０１を有する。   In FIG. 1, the audio diffusion device 10 includes an audio adjustment device 100, a speaker device 200, and a microphone device 201.

一般的な環境ではある程度の騒音が発生している。本発明は、このような騒音が発生している環境下で、出力音源が周囲環境音と似た特徴をもつ信号の場合、その出力音源は聞き取りづらくなる特性を用いている。   Some noise is generated in a general environment. In the present invention, in an environment where such noise is generated, when the output sound source is a signal having characteristics similar to those of the surrounding environment sound, the output sound source is difficult to hear.

音声拡散抑制装置１０は、入力された入力信号ＳＩを出力信号として出力する際、マイク装置２０１近傍の環境音の特性を示す周囲環境信号ＮＩを取得し、その周囲環境信号ＮＩに近似する特性に調整した出力信号ＳＯを出力する。   When outputting the input signal SI as an output signal, the sound diffusion suppression device 10 acquires the ambient environment signal NI indicating the ambient sound characteristics in the vicinity of the microphone device 201, and approximates the ambient environment signal NI. The adjusted output signal SO is output.

スピーカ装置２００は、音声調整装置１００により環境音に近似する特性に調整された出力信号ＳＯに基づいて、音声を放出する。例えば、受聴者２０がスピーカ装置２００の近傍にいる場合には、受聴者２０はスピーカ装置２００から出力された音声を聴収できる。   The speaker device 200 emits sound based on the output signal SO adjusted to a characteristic approximate to the environmental sound by the sound adjusting device 100. For example, when the listener 20 is in the vicinity of the speaker device 200, the listener 20 can listen to the sound output from the speaker device 200.

マイク装置２０１は、当該マイク装置２０１の周囲の環境音を取得（捕捉）し、取得した環境音を周囲環境信号ＮＩ（電気信号）に変換して音声調整装置１００に出力する。この実施形態では、マイク装置２０１は、出力音声の聴取を希望しない受聴者３０が存在する近傍に配置する場合を例示する。   The microphone device 201 acquires (captures) environmental sound around the microphone device 201, converts the acquired environmental sound into an ambient environment signal NI (electric signal), and outputs the ambient sound to the sound adjustment device 100. In this embodiment, the case where the microphone device 201 is disposed in the vicinity of the listener 30 who does not desire to listen to the output sound is illustrated.

音声調整装置１００は、入力信号ＳＩと、周囲環境信号ＮＩとを入力し、後述する処理により、受聴者３０の周囲環境音によりマスキングされるような出力信号ＳＯをスピーカ装置２００に出力する。   The sound adjustment device 100 receives the input signal SI and the ambient environment signal NI, and outputs an output signal SO that is masked by the ambient sound of the listener 30 to the speaker device 200 by a process described later.

ここで、音声調整装置１００に入力される入力信号ＳＩは、受聴者２０に聴取させたいが、受聴者３０には受聴させたくない音声である。入力信号ＳＩは、音声調整装置１００で処理され、出力信号ＳＯとして生成された後、スピーカ装置２００から放出される。当該放出された音声は、受聴者３０にも伝搬する可能性があるが、伝搬した音声が、受聴者３０の周囲環境音によりマスキングされるように音声調整装置１００で処理を施されるため、受聴者３０が当該音声を聴取することが困難となるようにしている。   Here, the input signal SI input to the sound adjustment device 100 is a sound that the listener 20 wants to listen to but the listener 30 does not want to listen to. The input signal SI is processed by the sound adjustment device 100 and generated as the output signal SO, and then emitted from the speaker device 200. The emitted sound may be propagated to the listener 30, but since the propagated sound is processed by the sound adjustment device 100 so as to be masked by the ambient sound of the listener 30, It is difficult for the listener 30 to listen to the sound.

図２は、実施形態に係る音声調整装置１００の内部構成を示すブロック図である。   FIG. 2 is a block diagram illustrating an internal configuration of the audio adjustment device 100 according to the embodiment.

図２において、音声調整装置１００は、周波数変換部１０１、聴覚特性情報推定手段としてのラウドネス推定部１０２、音信号特性調整手段としての特徴量調整部１０３、環境特性変換部１０４、環境特性調整手段としての環境特性調整部１０５、周波数逆変換部１０６を有する。   In FIG. 2, the sound adjustment apparatus 100 includes a frequency conversion unit 101, a loudness estimation unit 102 as an auditory characteristic information estimation unit, a feature amount adjustment unit 103 as a sound signal characteristic adjustment unit, an environmental characteristic conversion unit 104, and an environmental characteristic adjustment unit. As an environmental characteristic adjustment unit 105 and a frequency inverse conversion unit 106.

音声調整装置１００のハードウェア構成は、例えば、ＣＰＵ、ＲＯＭ、ＲＡＭ、ＥＥＰＲＯＭ、入出力インタフェース部等を有する装置や音信号を制御する専用チップなどとすることができる。例えば、ＣＰＵが、ＲＯＭに格納される音信号調整プログラムを実行することにより、実施形態に係る音信号調整処理が実現される。なお、音信号調整プログラムが、音声調整装置１００等のハードウェアにインストールされることによりシステム構築できるものであってもよい。その場合でも、音信号調整プログラムは図２に示すブロックとして機能するものとして表すことができる。   The hardware configuration of the sound adjustment device 100 can be, for example, a device having a CPU, ROM, RAM, EEPROM, input / output interface unit, or a dedicated chip for controlling sound signals. For example, the sound signal adjustment processing according to the embodiment is realized by the CPU executing a sound signal adjustment program stored in the ROM. Note that the sound signal adjustment program may be a system that can be constructed by being installed in hardware such as the audio adjustment device 100. Even in this case, the sound signal adjustment program can be expressed as functioning as a block shown in FIG.

周波数変換部１０１は、入力信号ＳＩを入力し、当該入力信号ＳＩを周波数変換して得た入力周波数信号ＳＦｘを特徴量調整部１０３に出力する。   The frequency conversion unit 101 receives the input signal SI and outputs an input frequency signal SFx obtained by frequency conversion of the input signal SI to the feature amount adjustment unit 103.

ラウドネス推定部１０２は、マイク装置２０１からの周囲環境信号ＮＩに基づいて、環境音の聴覚特性としてのラウドネス補正値を推定し、推定したラウドネス補正値を含む特徴調整情報ＬＦｘを特徴量調整部１０３に出力する。   The loudness estimation unit 102 estimates the loudness correction value as the auditory characteristic of the environmental sound based on the ambient environment signal NI from the microphone device 201, and the feature amount adjustment unit 103 uses the feature adjustment information LFx including the estimated loudness correction value. Output to.

特徴量調整部１０３は、ラウドネス推定部１０２からの特徴調整情報ＬＦｘに基づいて、入力周波数信号ＳＦｘの周波数成分を調整し、ラウドネス調整信号ＬＳｘを環境特性調整部１０５に出力する。   The feature amount adjustment unit 103 adjusts the frequency component of the input frequency signal SFx based on the feature adjustment information LFx from the loudness estimation unit 102, and outputs the loudness adjustment signal LSx to the environment characteristic adjustment unit 105.

環境特性変換部１０４は、マイク装置２０１からの周囲環境信号ＮＩを入力し、当該周囲環境信号ＮＩを周波数変換して得た環境特性信号ＮＦｘを環境特性調整部１０５に出力する。   The environmental characteristic conversion unit 104 receives the ambient environment signal NI from the microphone device 201 and outputs an environmental characteristic signal NFx obtained by frequency-converting the ambient environment signal NI to the environmental characteristic adjustment unit 105.

環境特性調整部１０５は、環境特性変換部１０４からの環境特性信号ＮＦｘに基づいて、ラウドネス調整信号ＬＳｘの周波数成分を調整し、環境特性調整信号ＮＳｘを周波数逆変換部１０６に出力する。   The environmental characteristic adjustment unit 105 adjusts the frequency component of the loudness adjustment signal LSx based on the environmental characteristic signal NFx from the environmental characteristic conversion unit 104, and outputs the environmental characteristic adjustment signal NSx to the frequency inverse conversion unit 106.

周波数逆変換部１０６は、環境特性調整部１０５からの環境特性調整信号ＮＳｘを逆周波数変換により時間領域の信号に変換し、出力信号ＳＯをスピーカ２００に出力する。   The frequency reverse conversion unit 106 converts the environmental characteristic adjustment signal NSx from the environmental characteristic adjustment unit 105 into a time domain signal by reverse frequency conversion, and outputs the output signal SO to the speaker 200.

（Ａ−２）実施形態の動作
次に、実施形態に係る音声調整装置１００における音信号調整処理の動作を、図面を参照しながら詳細に説明する。 (A-2) Operation of Embodiment Next, the operation of the sound signal adjustment processing in the sound adjustment device 100 according to the embodiment will be described in detail with reference to the drawings.

入力信号ＳＩは、周波数変換部１０１で周波数領域に変換され、周波数領域に変換された入力周波数信号ＳＦｘは、特徴量調整部１０３に出力される。なお、当該周波数領域への変換方法は、既存技術を広く適用でき、公知のＦＦＴ法を用いてよい。   The input signal SI is converted into the frequency domain by the frequency conversion unit 101, and the input frequency signal SFx converted into the frequency domain is output to the feature amount adjustment unit 103. Note that existing techniques can be widely applied as the method of conversion to the frequency domain, and a known FFT method may be used.

また、周囲環境信号ＮＩは、マイク装置２０１により、音声拡散を抑制する環境の環境雑音が取得される。当該周囲環境信号ＮＩは、ラウドネス推定部１０２に出力され、ラウドネス推定部１０２はラウドネス補正値を推定する。ラウドネスは、音の聴覚的な強さを示すものである。   In addition, the ambient environment signal NI is acquired by the microphone device 201 as environmental noise in an environment that suppresses voice diffusion. The ambient environment signal NI is output to the loudness estimation unit 102, and the loudness estimation unit 102 estimates a loudness correction value. Loudness indicates the auditory strength of sound.

次に、ラウドネス補正値の推定処理を図３及び図４を参照しながら説明する。   Next, loudness correction value estimation processing will be described with reference to FIGS.

図３は、実施形態に係る等ラウドネス曲線からラウドネス補正値を算出する方法を説明する説明図である。図４は、実施形態に係るラウドネス推定部１０２におけるラウドネス補正値の推定処理を示すフローチャートである。   FIG. 3 is an explanatory diagram for explaining a method for calculating a loudness correction value from an equal loudness curve according to the embodiment. FIG. 4 is a flowchart illustrating a process of estimating a loudness correction value in the loudness estimation unit 102 according to the embodiment.

ラウドネス補正値は、マイク装置２０１周囲の周囲環境音と同じ大きさに聞こえる周波数特性であり、基準周波数を０ｄＢとした相対的な値である。   The loudness correction value is a frequency characteristic that can be heard at the same level as the ambient environmental sound around the microphone device 201, and is a relative value with a reference frequency of 0 dB.

図４において、ラウドネス推定部１０２では、マイク装置２０１で入力される周囲環境信号ＮＩの音圧レベルＰｎを推定する（ステップＳ１）。ここで、周囲環境信号ＮＩの音圧レベルＰｎの推定は、マイク装置２０１の特性に基づいて予め設計しておく。   4, the loudness estimation unit 102 estimates the sound pressure level Pn of the ambient environment signal NI input from the microphone device 201 (step S1). Here, the estimation of the sound pressure level Pn of the ambient environment signal NI is designed in advance based on the characteristics of the microphone device 201.

次に、ラウドネス推定部１０２は、周囲環境信号ＮＩの音圧レベルＰｎと、基準周波数Ｆｆにおける等ラウドネス曲線の音圧レベルとが一致する等ラウドネス曲線を選択する（ステップＳ２）。ラウドネス推定部１０３は、選択した等ラウドネス曲線において、各周波数成分における音圧レベルＰｎと、基準周波数Ｆｆにおける音圧レベルとの差分を計算する（ステップＳ３）。ラウドネス推定部１０３は、各周波数成分における音圧レベルＰｎと、基準周波数Ｆｆにおける音圧レベルとの差分値を特徴量調整部１０３に出力する（ステップＳ４）。   Next, the loudness estimation unit 102 selects an equal loudness curve in which the sound pressure level Pn of the ambient environment signal NI matches the sound pressure level of the equal loudness curve at the reference frequency Ff (step S2). The loudness estimation unit 103 calculates the difference between the sound pressure level Pn at each frequency component and the sound pressure level at the reference frequency Ff in the selected equal loudness curve (step S3). The loudness estimation unit 103 outputs a difference value between the sound pressure level Pn at each frequency component and the sound pressure level at the reference frequency Ff to the feature amount adjustment unit 103 (step S4).

ここで、この実施形態では、例えば基準周波数Ｆｆを１ｋＨｚとする場合を例示して説明する。しかし、基準周波数Ｆｆは、１ｋＨｚに限らず、他の周波数であってもよいし、動的な周波数値であってもかまわない。例えば、周囲環境信号ＮＩを公知の自己相関関数を用いて一定間隔で計算し、当該自己相関関数の最大遅延量から計算された周波数を基準周波数Ｆｆとしてもよい。   Here, in this embodiment, for example, a case where the reference frequency Ff is 1 kHz will be described as an example. However, the reference frequency Ff is not limited to 1 kHz, and may be another frequency or a dynamic frequency value. For example, the ambient environment signal NI may be calculated at regular intervals using a known autocorrelation function, and the frequency calculated from the maximum delay amount of the autocorrelation function may be used as the reference frequency Ff.

上記周波数成分毎の音圧レベルの差分値の算出方法を、図３を用いて例示する。   The calculation method of the difference value of the sound pressure level for each frequency component will be exemplified with reference to FIG.

ここで、等ラウドネス曲線は、ラウドネスのレベルごとに、周波数の変化に基づいて、ヒトが感覚的に同じラウドネスレベルで聴収することを物理的に計測して得られる音圧レベルの変化を示す曲線である。   Here, the equal loudness curve indicates a change in sound pressure level obtained by physically measuring that a human perceives at the same loudness level sensuously based on a change in frequency for each loudness level. It is a curve.

等ラウドネス曲線は、図３（Ａ）のように複数の周波数特性を列挙した表に置き換えられる。図３（Ａ）は、行方向に周波数成分（Ｆ１、Ｆ２、…、Ｆｆ、…Ｆｎ、…）として等ラウドネス曲線（ａ１、ａ２、ａ３、…ａｎ、…）の各周波数成分の音圧レベルを列挙したものである。   The equal loudness curve is replaced with a table listing a plurality of frequency characteristics as shown in FIG. FIG. 3A shows the sound pressure level of each frequency component of the equal loudness curve (a1, a2, a3,..., An,...) As frequency components (F1, F2,... Ff,... Fn,...) In the row direction. Are enumerated.

ラウドネス推定部１０２は、例えば図３（Ａ）に例示するような、基準周波数Ｆｆにおける各等ラウドネス曲線の音圧レベル（例えば、等ラウドネス曲線ａ１の場合、ａ１（ｆ１）、ａ１（ｆ２）、…、ａ１（ｆｆ）、…等）から、周囲環境信号ＮＩの音圧レベルＰｎに一致する等ラウドネス曲線を選択する（図３（Ｂ）参照）。図３（Ｂ）では、等ラウドネス曲線ａｎが選択されたものとしている。   The loudness estimation unit 102, for example, as illustrated in FIG. 3A, the sound pressure level of each equal loudness curve at the reference frequency Ff (for example, in the case of the equal loudness curve a1, a1 (f1), a1 (f2), ..., a1 (ff), ..., etc.), an equal loudness curve that matches the sound pressure level Pn of the ambient environment signal NI is selected (see FIG. 3B). In FIG. 3B, it is assumed that the equal loudness curve an is selected.

ラウドネス推定部１０２は、当該等ラウドネス曲線ａｎの各周波数成分における音圧レベル（ａｎ（ｆ１）、ａｎ（ｆ２）、…、ａｎ（ｆｆ）、…）のそれぞれと、基準周波数Ｆｆにおける音圧レベルａｎ（Ｆｆ）との差分を計算し、音圧レベルの差分値Ｄｎは図３（Ｃ）のようになる。したがって、基準周波数Ｆｆでの音圧レベル差は０ｄＢとなる。   The loudness estimation unit 102 determines the sound pressure level (an (f1), an (f2),..., An (ff),...) At each frequency component of the equal loudness curve an and the sound pressure level at the reference frequency Ff. The difference from an (Ff) is calculated, and the sound pressure level difference value Dn is as shown in FIG. Therefore, the sound pressure level difference at the reference frequency Ff is 0 dB.

上記のようにして計算して得られた当該音圧レベルの差分値Ｄｎをラウドネス補正値する。なお、当該差分値Ｄｎは、後述する図５（Ｂ）に例示する周波数特性に相当する。   The sound pressure level difference value Dn obtained by the above calculation is used as a loudness correction value. The difference value Dn corresponds to the frequency characteristic illustrated in FIG.

ここで、この実施形態では、図３（Ａ）に例示する等ラウドネス曲線は、国際標準化規格ＩＳＯ２２６：２００３に示される等ラウドネス曲線を用いる場合を例示している。しかし、当該等ラウドネス曲線は、マイク装置２０１、スピーカ装置２００の周波数特性を考慮して、変更してもかまわない。また、取得した周囲環境信号ＮＩの音圧レベルＰｎよりも等ラウドネス曲線の音圧レベルが大きい場合、音圧レベル差の値は正数となり、取得した周囲環境信号ＮＩの音圧レベルＰｎよりも等ラウドネス曲線の音圧レベルが小さい場合、音圧レベル差の値は負数となる。これによりスピーカ装置２００から出力される音声を周囲の環境音と同等の聞こえ方（ラウドネス）とすることにより、マイク装置２０１で、当該出力された音声をマスキングすることができる。ラウドネス推定部１０２は、上記のようにして推定したラウドネス補正値を特徴調整情報ＬＦｘとして特徴量調整部１０３に出力する。   Here, in this embodiment, the equal loudness curve illustrated in FIG. 3A illustrates the case where the equal loudness curve shown in the international standard ISO 226: 2003 is used. However, the equal loudness curve may be changed in consideration of the frequency characteristics of the microphone device 201 and the speaker device 200. Further, when the sound pressure level of the equal loudness curve is larger than the sound pressure level Pn of the acquired ambient environment signal NI, the value of the sound pressure level difference is a positive number, which is higher than the sound pressure level Pn of the acquired ambient environment signal NI. When the sound pressure level of the equal loudness curve is small, the value of the sound pressure level difference is a negative number. As a result, the sound output from the speaker device 200 is made to be heard in the same way as the surrounding environmental sound (loudness), whereby the output sound can be masked by the microphone device 201. The loudness estimation unit 102 outputs the loudness correction value estimated as described above to the feature amount adjustment unit 103 as feature adjustment information LFx.

次に、特徴量調整部１０３での周波数成分の調整方法を、図５を用いて説明する。   Next, a frequency component adjustment method in the feature amount adjustment unit 103 will be described with reference to FIG.

図５は、実施形態に係る特徴量調整部１０３で入出力される信号の周波数特性を説明する説明図である。   FIG. 5 is an explanatory diagram illustrating the frequency characteristics of signals input and output by the feature amount adjustment unit 103 according to the embodiment.

特徴量調整部１０３には、入力周波数信号ＳＦｘと特徴調整情報ＬＦｘとが入力される。特徴量調整部１０３では、入力周波数信号ＳＦｘの周波数成分をＳＦｎ＝｛ＳＦ１、ＳＦ２、…｝、基準周波数Ｆｆにおける周波数成分を基準ゲインＳＦ（Ｆｆ）、特徴調整情報ＬＦｘの周波数成分ＬＦｎ＝｛ＬＦ１、ＬＦ２、…｝として、周波数ごとに次のように調整する。   The feature amount adjustment unit 103 receives the input frequency signal SFx and the feature adjustment information LFx. In the feature amount adjustment unit 103, the frequency component of the input frequency signal SFx is SFn = {SF1, SF2,...}, The frequency component at the reference frequency Ff is the reference gain SF (Ff), and the frequency component LFn = {LF1 of the feature adjustment information LFx. , LF2,...}, The frequency is adjusted as follows for each frequency.

特徴量調整部１０３は、特徴調整情報ＬＦｘの周波数成分ＬＦｎの値に基準周波数Ｆｆにおける基準ゲインＳＦ（Ｆｆ）の値を加算した値（ＳＦ（Ｆｆ）＋ＬＦｎ）と、入力周波数信号ＳＦｘの周波数成分ＳＦｎの値とを比較して、その比較結果に応じて、入力周波数信号ＳＦｘの周波数成分ＳＦｎの値を調整する。   The feature amount adjustment unit 103 adds the value of the reference gain SF (Ff) at the reference frequency Ff to the value of the frequency component LFn of the feature adjustment information LFx (SF (Ff) + LFn) and the frequency component of the input frequency signal SFx. The value of SFn is compared, and the value of the frequency component SFn of the input frequency signal SFx is adjusted according to the comparison result.

ＳＦｎ≦（ＳＦ（Ｆｆ）＋ＬＦｎ）を満たす場合、特徴量調整部１０３は、入力周波数信号ＳＦｘの周波数成分ＳＦｎの値の調整を実施しない。つまり、特徴量調整部１０３は、入力周波数信号ＳＦｘの周波数成分ＳＦｎの値を、ラウドネス調整信号ＬＳｘの周波数成分ＬＳｎの値（すなわち、ＬＳｎ＝ＳＦｎ）として出力する。   When SFn ≦ (SF (Ff) + LFn) is satisfied, the feature amount adjustment unit 103 does not adjust the value of the frequency component SFn of the input frequency signal SFx. That is, the feature amount adjustment unit 103 outputs the value of the frequency component SFn of the input frequency signal SFx as the value of the frequency component LSn of the loudness adjustment signal LSx (that is, LSn = SFn).

ＳＦｎ＞（ＳＦ（Ｆｆ）＋ＬＦｎ）を満たす場合、特徴量調整部１０３は、入力周波数信号ＳＦｘの周波数成分ＳＦｎの値を調整する。つまり、特徴量調整部１０３は、特徴調整情報ＬＦｘの周波数成分ＬＦｎの値に基準周波数Ｆｆにおける基準ゲインＳＦ（Ｆｆ）の値を加算した値（ＳＦ（Ｆｆ）＋ＬＦｎ）を、ラウドネス調整信号ＬＳｘの周波数成分ＬＳｎの値（すなわち、ＬＳｎ＝（ＳＦ（Ｆｆ）＋ＬＦｎ））となるように調整して出力する。   When SFn> (SF (Ff) + LFn) is satisfied, the feature amount adjustment unit 103 adjusts the value of the frequency component SFn of the input frequency signal SFx. That is, the feature amount adjustment unit 103 adds a value (SF (Ff) + LFn) obtained by adding the value of the reference gain SF (Ff) at the reference frequency Ff to the value of the frequency component LFn of the feature adjustment information LFx, and the loudness adjustment signal LSx. The frequency component LSn is adjusted so as to be the value (that is, LSn = (SF (Ff) + LFn)) and output.

図５（Ａ）は、入力周波数信号ＳＦｘの周波数特性を示す説明図であり、図５（Ｂ）は、特徴調整情報ＬＦｘの周波数特性を示す説明図である。   FIG. 5A is an explanatory diagram illustrating the frequency characteristics of the input frequency signal SFx, and FIG. 5B is an explanatory diagram illustrating the frequency characteristics of the feature adjustment information LFx.

図５（Ｃ）において、実線は図５（Ａ）の入力周波数信号ＳＦｘの周波数成分の特性を示しており、点線は、特徴調整情報ＬＦｘの周波数成分の値に、基準周波数Ｆｆにおける基準ゲインＳＦ（Ｆｆ）の値を加算したときの特性（すなわち、ＳＦ（Ｆｆ）＋ＬＦｎ）を示している。   In FIG. 5C, the solid line indicates the characteristic of the frequency component of the input frequency signal SFx in FIG. 5A, and the dotted line indicates the value of the frequency component of the feature adjustment information LFx and the reference gain SF at the reference frequency Ff. The characteristic (namely, SF (Ff) + LFn) when the value of (Ff) is added is shown.

特徴量調整部１０３は、図５（Ｃ）に示すように、入力周波数信号ＳＦｘの周波数成分の特性（実線）と、特徴調整情報ＬＦｘの周波数成分の値に、基準周波数Ｆｆにおける基準ゲインＳＦ（Ｆｆ）の値を加算したときの特性（点線）との比較により、図５（Ｄ）に示すようなラウドネス調整信号ＬＳｘの周波数特性を環境特性調整部１０５に出力する。   As shown in FIG. 5C, the feature amount adjustment unit 103 converts the frequency component characteristic (solid line) of the input frequency signal SFx and the frequency component value of the feature adjustment information LFx into a reference gain SF ( A frequency characteristic of the loudness adjustment signal LSx as shown in FIG. 5D is output to the environmental characteristic adjustment unit 105 by comparison with the characteristic (dotted line) when the value of Ff) is added.

なお、図５（Ａ）の周波数成分が、当該調整により、図５（Ｄ）の実線の特性となる。ただし、当該抑制量は、出力信号ＳＯがスピーカ装置２００から出力される音声の周波数特性に合わせて、変更してかまわない。   Note that the frequency component in FIG. 5A becomes the characteristic of the solid line in FIG. 5D by the adjustment. However, the amount of suppression may be changed according to the frequency characteristics of the sound output from the speaker device 200 as the output signal SO.

環境特性変換部１０４では、周囲環境信号ＮＩの基準周波数Ｆｆの周波数成分を取得し、環境特性信号ＮＦｘとして出力する。この実施形態では、周囲環境信号ＮＩを公知のＦＦＴ法により周波数変換したのち、基準周波数Ｆｆの成分ＮＳ（Ｆｆ）を環境特性信号ＮＦｘとしている。すなわち、図６（Ｂ）の基準周波数Ｆｆにおける周波数成分が環境特性信号ＮＦｘとなる。ただし、当該環境特性信号ＮＦｘの取得方法は、上記方法に限定しない。例えば、上記方法で取得した周波数成分ＮＳ（Ｆｆ）に、スピーカ装置２００から出力される音声の周波数特性を考慮した係数を加算するようにしてもよい。すなわち、周囲環境信号ＮＩをスピーカ装置２００から出力した場合にマイク装置２０１の周囲の音と同じ周波数特性となるように周波数特性変換係数を加算し、この結果を環境特性信号ＮＦｘとしてもよい。また、基準周波数Ｆｆは、ラウドネス推定部１０２で使用する基準周波数Ｆｆと同じで、この実施形態では１ｋＨｚとしている。   The environmental characteristic conversion unit 104 acquires the frequency component of the reference frequency Ff of the ambient environmental signal NI and outputs it as the environmental characteristic signal NFx. In this embodiment, after the ambient environment signal NI is frequency-converted by a known FFT method, the component NS (Ff) of the reference frequency Ff is used as the environment characteristic signal NFx. That is, the frequency component at the reference frequency Ff in FIG. 6B is the environmental characteristic signal NFx. However, the acquisition method of the environmental characteristic signal NFx is not limited to the above method. For example, you may make it add the coefficient which considered the frequency characteristic of the audio | voice output from the speaker apparatus 200 to the frequency component NS (Ff) acquired by the said method. That is, when the ambient environment signal NI is output from the speaker device 200, a frequency characteristic conversion coefficient may be added so that the frequency characteristic is the same as that of the sound around the microphone device 201, and the result may be used as the environment characteristic signal NFx. The reference frequency Ff is the same as the reference frequency Ff used in the loudness estimation unit 102, and is 1 kHz in this embodiment.

図６は、実施形態に係る環境特性調整部１０５で入出力される信号の周波数特性を説明する説明図である。   FIG. 6 is an explanatory diagram illustrating the frequency characteristics of signals input and output by the environmental characteristic adjustment unit 105 according to the embodiment.

環境特性調整部１０５には、ラウドネス調整信号ＬＳｘと、環境特性信号ＮＦｘとが入力される。   The environmental characteristic adjustment unit 105 receives the loudness adjustment signal LSx and the environmental characteristic signal NFx.

環境特性調整部１０５では、基準周波数Ｆｆにおける、ラウドネス調整信号ＬＳｘの周波数成分の値と入力される環境特性信号ＮＦｘの周波数成分の値とが、同程度の大きさとなるように、ラウドネス調整信号ＬＳｘ全体を増幅し、これを環境特性調整信号ＮＳｘとして周波数逆変換部１０６に出力する。   In the environmental characteristic adjustment unit 105, the loudness adjustment signal LSx is set so that the value of the frequency component of the loudness adjustment signal LSx and the value of the frequency component of the input environmental characteristic signal NFx at the reference frequency Ff are approximately the same. The whole is amplified and output to the frequency inverse transform unit 106 as an environmental characteristic adjustment signal NSx.

図６（Ａ）は、ラウドネス調整信号ＬＳｘの周波数特性を示す説明図であり実線がラウドネス調整信号ＬＳｘの周波数特性を示している。なお図６（Ａ）に示されるラウドネス調整信号ＬＳｘは、上述した図５（Ｄ）に示されるものと同一である。   FIG. 6A is an explanatory diagram showing the frequency characteristics of the loudness adjustment signal LSx, and the solid line shows the frequency characteristics of the loudness adjustment signal LSx. The loudness adjustment signal LSx shown in FIG. 6 (A) is the same as that shown in FIG. 5 (D) described above.

図６（Ｂ）は、環境特性信号ＮＦｘの周波数特性を示す図面である。   FIG. 6B shows the frequency characteristics of the environmental characteristic signal NFx.

環境特性調整部１０５は、図６（Ｃ）に示すように、基準周波数Ｆｆにおけるラウドネス調整信号ＬＳｘの周波数成分ＬＳ（Ｆｆ）の値と、基準周波数Ｆｆにおける環境特性信号ＮＦｘの周波数成分ＮＦ（Ｆｆ）の値との差分値を増幅量Ａとする。   As shown in FIG. 6C, the environmental characteristic adjusting unit 105 performs the frequency component LS (Ff) of the loudness adjustment signal LSx at the reference frequency Ff and the frequency component NF (Ff) of the environmental characteristic signal NFx at the reference frequency Ff. The difference value from the value of) is defined as an amplification amount A.

すなわち、環境特性調整部１０５は、増幅量Ａ＝ＮＦ（Ｆｆ）−ＬＳ（Ｆｆ）の値を計算し、ラウドネス調整信号ＬＳｘの全体（すなわち、ラウドネス調整信号ＬＳｘの各周波数成分の値）に増幅量Ａを加算（増幅）する。   That is, the environmental characteristic adjustment unit 105 calculates the value of the amplification amount A = NF (Ff) −LS (Ff) and amplifies it to the entire loudness adjustment signal LSx (that is, the value of each frequency component of the loudness adjustment signal LSx). The amount A is added (amplified).

環境特性調整部１０５による上記調整により、図６（Ａ）の実線で示すラウドネス調整信号ＬＳｘの周波数特性は、図６（Ｄ）の実線で示す環境特性調整信号ＮＳｘの周波数特性に調整されて出力される。   By the above adjustment by the environmental characteristic adjustment unit 105, the frequency characteristic of the loudness adjustment signal LSx indicated by the solid line in FIG. 6A is adjusted to the frequency characteristic of the environmental characteristic adjustment signal NSx indicated by the solid line in FIG. Is done.

ただし、当該増幅量Ａの決定方法は、出力信号ＳＯがスピーカ装置２００から出力される特性に合わせて、変更してかまわない。また、ラウドネス調整信号ＬＳｘの基準周波数Ｆｆの成分と入力される環境特性信号ＮＦｘとが、一致する判定においても、この限りでなく、例えば、ＬＳ（Ｆｆ）±３ｄＢ以内である場合を一致すると判定してもよい。さらに、一致ではなく、ラウドネス調整信号ＬＳｘの基準周波数Ｆｆにおける周波数成分ＬＳ（Ｆｆ）が環境特性信号ＮＦｘを超えないとしてもよい。   However, the method for determining the amplification amount A may be changed in accordance with the characteristic that the output signal SO is output from the speaker device 200. Further, the determination that the component of the reference frequency Ff of the loudness adjustment signal LSx matches the input environmental characteristic signal NFx is not limited to this. For example, it is determined that the case of LS (Ff) ± 3 dB is the same. May be. Furthermore, it is not coincident, and the frequency component LS (Ff) at the reference frequency Ff of the loudness adjustment signal LSx may not exceed the environmental characteristic signal NFx.

さらに、この実施形態の環境特性調整部１０５では、ラウドネス調整信号ＬＳｘの全体に増幅量Ａを加える場合を例示した。しかし、例えば、基準周波数Ｆｆ以上の周波数成分のみ増幅量Ａを加えるようにしてもよく、結果として、出力信号ＳＯがスピーカ装置２００から出力される特性が適切となるように調整できればよい。   Furthermore, in the environmental characteristic adjustment unit 105 of this embodiment, the case where the amplification amount A is added to the entire loudness adjustment signal LSx is exemplified. However, for example, the amplification amount A may be added only to a frequency component that is equal to or higher than the reference frequency Ff. As a result, it is sufficient that the output signal SO is adjusted so that the characteristics of the output from the speaker device 200 are appropriate.

環境特性調整部１０５は、上記調整を実施した信号を環境特性調整信号ＮＳｘとし、周波数逆変換部１０６に出力する。周波数逆変換部１０６では、環境特性調整信号ＮＳｘが周波数領域から時間領域へ変換され、出力信号ＳＯとしてスピーカ装置２００に出力する。   The environmental characteristic adjustment unit 105 outputs the signal subjected to the above adjustment as the environmental characteristic adjustment signal NSx to the frequency inverse conversion unit 106. In the frequency inverse conversion unit 106, the environmental characteristic adjustment signal NSx is converted from the frequency domain to the time domain and output to the speaker device 200 as the output signal SO.

出力音声の拡散を抑制するために、マスキング音を使用せず、出力音声を抑制する周囲の環境音に近い成分にすることで、聴感的に音声聴取をしづらくし、出力音声を抑制する周囲に別の音声を出力させることなく、出力音声の拡散を抑制することが可能となる。また、この実施形態では、入力周波数信号ＳＦｘに対し、特徴量調整部１０３、環境特性調整部１０５の順に適用したが、当該適用順序を逆としても、効果に影響はない。   In order to suppress the spread of the output sound, do not use the masking sound, but make it a component close to the surrounding environmental sound that suppresses the output sound. Thus, it is possible to suppress the spread of the output sound without outputting another sound. In this embodiment, the feature amount adjustment unit 103 and the environment characteristic adjustment unit 105 are applied to the input frequency signal SFx in this order. However, even if the application order is reversed, the effect is not affected.

（Ａ−３）実施形態の効果
以上のように、この実施形態によれば、出力音声の拡散を抑制するために、マスキング音を使用せず、出力音声を抑制する周囲の環境音に近い成分にすることで、聴感的に音声聴取をしづらくし、出力音声を抑制する周囲に別の音声を出力させることなく、出力音声の拡散を抑制することが可能となる。 (A-3) Effect of Embodiment As described above, according to this embodiment, in order to suppress the diffusion of the output sound, a component close to the surrounding environmental sound that suppresses the output sound without using the masking sound. Accordingly, it is difficult to hear the sound audibly, and it is possible to suppress the diffusion of the output sound without outputting another sound around the output sound.

（Ｂ）他の実施形態
上述した実施形態においても種々の変形実施形態を言及したが、本発明は、以下の実施形態にも適用できる。 (B) Other Embodiments Although various modified embodiments have been mentioned in the above-described embodiments, the present invention can also be applied to the following embodiments.

上述した実施形態では、本発明が音声調整装置である場合を例示した。しかし、本発明は、例えば、システム、方法、プログラムもしくは記憶媒体等としての実施態様をとることが可能である。具体的には、複数の機器から構成されるシステムに適用しても良いし、また、１つの機器からなる装置及び当該装置に搭載されるプログラムに適用しても良い。   In the embodiment described above, the case where the present invention is a sound adjustment device has been exemplified. However, the present invention can take the form of, for example, a system, method, program, or storage medium. Specifically, the present invention may be applied to a system composed of a plurality of devices, or may be applied to a device composed of one device and a program installed in the device.

上述した実施形態では、マイク装置が１個である場合を例示した。しかし、複数個のマイク装置を備えておき、複数のマイク装置からの環境音信号の音圧レベルを考慮して環境音特性を算出するようにしてもよい。   In the embodiment described above, the case where there is one microphone device has been exemplified. However, a plurality of microphone devices may be provided, and the environmental sound characteristics may be calculated in consideration of the sound pressure levels of the environmental sound signals from the plurality of microphone devices.

上述した実施形態において、音声拡散抑圧装置に入力する入力信号は、例えば、録音された音信号であってもよいし、接続されている通信回線を通じて受信した音信号であってもよい。また、別個に設けられたマイク装置が取得した音信号であってもよい。   In the embodiment described above, the input signal input to the speech diffusion suppression apparatus may be a recorded sound signal or a sound signal received through a connected communication line, for example. Moreover, the sound signal acquired by the microphone device provided separately may be used.

１０…音声拡散抑制装置、２００…スピーカ装置、２０１…マイク装置、
１００…音声調整装置、１０１…周波数変換部、１０２…ラウドネス推定部、１０３…特徴量調整部、１０４…環境特性変換部、１０５…環境特性調整部、１０６…周波数逆変換部。 DESCRIPTION OF SYMBOLS 10 ... Audio | voice diffusion suppression apparatus, 200 ... Speaker apparatus, 201 ... Microphone apparatus,
DESCRIPTION OF SYMBOLS 100 ... Audio | voice adjustment apparatus, 101 ... Frequency conversion part, 102 ... Loudness estimation part, 103 ... Feature-value adjustment part, 104 ... Environmental characteristic conversion part, 105 ... Environmental characteristic adjustment part, 106 ... Frequency reverse conversion part

Claims (7)

入力された環境音信号の聴感特性を推定する聴感特性情報推定手段と、
上記環境音の聴感特性に基づいて、入力された音信号の周波数特性を調整する音信号特性調整手段と、
上記環境音信号の聴覚特性に基づく利得を、上記音信号特性調整手段により調整された上記音信号の周波数特性成分の全体に対して与える環境特性調整手段と
を備えること特徴とする音信号調整装置。 Audibility characteristic information estimation means for estimating the audibility characteristic of the input environmental sound signal;
Sound signal characteristic adjusting means for adjusting the frequency characteristic of the input sound signal based on the auditory characteristics of the environmental sound;
An environmental characteristic adjusting unit that gives a gain based on an auditory characteristic of the environmental sound signal to the entire frequency characteristic component of the sound signal adjusted by the sound signal characteristic adjusting unit. . 上記聴感特性情報推定手段が、上記入力された環境音信号の音圧値に基づいて、上記環境音信号の聴感特性を推定することを特徴とする請求項１に記載の音信号調整装置。   2. The sound signal adjustment device according to claim 1, wherein the audibility characteristic information estimation means estimates the audibility characteristic of the environmental sound signal based on a sound pressure value of the input environmental sound signal. 上記聴感特性情報推定手段が、
所定の複数の等ラウドネス曲線のそれぞれの音圧値の周波数特性を有する等ラウドネス曲線テーブルを有し、
上記等ラウドネス曲線テーブルから選択した、所定の基準周波数の音圧値を含む上記等ラウドネス曲線の各周波数の音圧値と、上記基準周波数の音圧値との差分値を、上記環境音の聴覚特性として推定する
ことを特徴とする請求項１又は２に記載の音信号調整装置。 The audibility characteristic information estimating means is
An equal loudness curve table having frequency characteristics of respective sound pressure values of a plurality of predetermined equal loudness curves;
The difference value between the sound pressure value of each frequency of the equal loudness curve including the sound pressure value of the predetermined reference frequency, selected from the equal loudness curve table, and the sound pressure value of the reference frequency is obtained as the hearing sound of the environmental sound. The sound signal adjustment device according to claim 1, wherein the sound signal adjustment device is estimated as a characteristic. 上記音信号特性調整手段が、上記環境音の聴覚特性に、入力された音信号の所定の基準周波数における音圧値を付与して得た環境音の補正聴覚特性の各周波数の音圧値と、上記音信号の各周波数の音圧値との比較結果に基づいて、上記音信号の周波数特性を調整することを特徴とする請求項１〜３のいずれかに記載の音信号調整装置。   The sound signal characteristic adjusting means includes the sound pressure value of each frequency of the corrected sound characteristic of the environmental sound obtained by adding the sound pressure value at the predetermined reference frequency of the input sound signal to the auditory characteristic of the environmental sound. The sound signal adjustment device according to claim 1, wherein the frequency characteristic of the sound signal is adjusted based on a comparison result with a sound pressure value of each frequency of the sound signal. 上記環境特性調整手段が、所定の基準周波数における、上記環境音信号の聴覚特性の音圧値と、上記音信号特性調整手段により調整された上記音信号の音圧値との差分値を含む利得を、上記音信号の周波数特性成分の全体に対して与えることを特徴とする請求項１〜４のいずれかに記載の音信号調整装置。   A gain including a difference value between a sound pressure value of the auditory characteristic of the environmental sound signal and a sound pressure value of the sound signal adjusted by the sound signal characteristic adjusting means at a predetermined reference frequency; The sound signal adjusting apparatus according to claim 1, wherein the frequency characteristic component of the sound signal is given to the entire frequency characteristic component of the sound signal. コンピュータを、
入力された環境音信号の聴感特性を推定する聴感特性情報推定手段と、
上記環境音の聴感特性に基づいて、入力された音信号の周波数特性を調整する音信号特性調整手段と、
上記環境音信号の聴覚特性に基づく利得を、上記音信号特性調整手段により調整された上記音信号の周波数特性成分の全体に対して与える環境特性調整手段と
して機能させること特徴とする音信号調整プログラム。 Computer
Audibility characteristic information estimation means for estimating the audibility characteristic of the input environmental sound signal;
Sound signal characteristic adjusting means for adjusting the frequency characteristic of the input sound signal based on the auditory characteristics of the environmental sound;
A sound signal that functions as an environmental characteristic adjusting unit that gives a gain based on an auditory characteristic of the environmental sound signal to the entire frequency characteristic component of the sound signal adjusted by the sound signal characteristic adjusting unit. Adjustment program. 環境音信号を取得するマイクロフォンと、
上記マイクロフォンから上記環境音信号を取得して、入力された音信号を調整する請求項１〜５のいずれかに記載の音信号調整装置である音信号調整手段と、
上記音信号調整手段により調整された音信号を出力するスピーカと
を備えることを特徴とする音響装置。 A microphone that acquires environmental sound signals;
Sound signal adjustment means that is a sound signal adjustment device according to any one of claims 1 to 5, wherein the environmental sound signal is acquired from the microphone and the input sound signal is adjusted.
And a speaker for outputting a sound signal adjusted by the sound signal adjusting means.
JP2016028803A 2016-02-18 2016-02-18 Sound signal adjusting device, sound signal adjusting program, and acoustic device Active JP6690285B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016028803A JP6690285B2 (en) 2016-02-18 2016-02-18 Sound signal adjusting device, sound signal adjusting program, and acoustic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2016028803A JP6690285B2 (en) 2016-02-18 2016-02-18 Sound signal adjusting device, sound signal adjusting program, and acoustic device

Publications (2)

Publication Number Publication Date
JP2017147636A true JP2017147636A (en) 2017-08-24
JP6690285B2 JP6690285B2 (en) 2020-04-28

Family

ID=59681680

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2016028803A Active JP6690285B2 (en) 2016-02-18 2016-02-18 Sound signal adjusting device, sound signal adjusting program, and acoustic device

Country Status (1)

Country Link
JP (1) JP6690285B2 (en)

Also Published As

Publication number Publication date
JP6690285B2 (en) 2020-04-28

Similar Documents

Publication Publication Date Title
US10368164B2 (en) Approach for partially preserving music in the presence of intelligible speech
US10535334B2 (en) Method and device for acute sound detection and reproduction
CN109640223B (en) Howling suppression method and device, sound and sound amplification system
US9305568B2 (en) Active acoustic filter with socially determined location-based filter characteristics
US9557960B2 (en) Active acoustic filter with automatic selection of filter parameters based on ambient sound
EP2229007A1 (en) An apparatus for processing an audio signal and method thereof
US9640168B2 (en) Noise cancellation with dynamic range compression
JP5626366B2 (en) Voice control device, voice control method, and voice control program
JP2006129434A (en) Automatic gain control method, automatic gain control apparatus, automatic gain control program and recording medium with the program recorded thereon
KR101694822B1 (en) Apparatus for outputting sound source and method for controlling the same
JP2010109624A (en) Sound processing circuit, sound processor, and sound processing method
JP2008527882A (en) Signal processing apparatus, sound system and method for amplifying sound level of sound signal depending on frequency
KR20120102561A (en) Hearing aid masking apparatus and method against environmental noise
KR20100120567A (en) Audio outputting device and method for outputting audio
JP2008148179A (en) Noise suppression processing method in audio signal processor and automatic gain controller
JP2006333396A (en) Audio signal loudspeaker
KR101405847B1 (en) Signal Processing Structure for Improving Audio Quality of A Car Audio System
JP6690285B2 (en) Sound signal adjusting device, sound signal adjusting program, and acoustic device
JP5106651B2 (en) Signal processing apparatus and signal processing method
JP2008227681A (en) Acoustic characteristic correction system
NL2031643B1 (en) Method and device for compressing a dynamic range of an audio signal
US11902747B1 (en) Hearing loss amplification that amplifies speech and noise subsignals differently
JP2011040831A (en) Headphone and method for canceling digital noise
JP4666320B2 (en) Limiter / Compressor
JP2014176052A (en) Handsfree device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20181115

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20190913

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20190924

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20191121

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20200310

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20200323

R150 Certificate of patent or registration of utility model

Ref document number: 6690285

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150