WO2006109390A1 - Arousal level lowering preventive device, arousal level lowering preventive method, arousal level lowering preventive program, and recording medium - Google Patents

Arousal level lowering preventive device, arousal level lowering preventive method, arousal level lowering preventive program, and recording medium Download PDF

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Publication number
WO2006109390A1
WO2006109390A1 PCT/JP2006/305051 JP2006305051W WO2006109390A1 WO 2006109390 A1 WO2006109390 A1 WO 2006109390A1 JP 2006305051 W JP2006305051 W JP 2006305051W WO 2006109390 A1 WO2006109390 A1 WO 2006109390A1
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Prior art keywords
arousal level
acoustic parameters
decrease
changing
sound
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PCT/JP2006/305051
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French (fr)
Japanese (ja)
Inventor
Masatoshi Yanagidaira
Mitsuo Yasushi
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Pioneer Corporation
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
    • A61M2021/0005—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis by the use of a particular sense, or stimulus
    • A61M2021/0027—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis by the use of a particular sense, or stimulus by the hearing sense

Definitions

  • Arousal level lowering prevention apparatus arousal level lowering prevention method, arousal level lowering prevention program, and recording medium
  • the present invention relates to a wakefulness reduction prevention device, a wakefulness fall prevention method, a wakefulness fall prevention program, and a recording medium, and more specifically, a wakefulness level for preventing a decrease in human wakefulness level.
  • the present invention relates to a fall prevention device, a wakefulness fall prevention method, a wakefulness fall prevention program, and a recording medium.
  • FIG. 5 is a diagram showing a configuration of the arousal level lowering prevention apparatus of Patent Document 1. As shown in FIG. As shown in FIG. 5, the device for preventing arousal level reduction in the same document switches between a plurality of different audio devices (radio, cassette deck, CD player) 101, 102, 103 and a plurality of audio devices 101, 102, 103.
  • a plurality of different audio devices radio, cassette deck, CD player
  • the apparatus for preventing arousal level reduction in the same document constitutes a plurality of music sources and is selected. Play intermittently on the selected source.
  • the reason for using multiple music sources is to switch to another medium when there is a preference for songs, when songs contain mild songs, accustomed to songs from the same source, or when it becomes impossible to receive radio etc. This is necessary.
  • Patent Document 1 JP 2002-149348 A
  • the present invention has been made in view of the above problems, and in consideration of the psychoacoustics described above, by changing the position, volume, and sound quality of a sound image during signal reproduction, a low-cost configuration is achieved. And providing a device for preventing a decrease in arousal level, a method for preventing a decrease in arousal level, a program for preventing a decrease in arousal level, and a recording medium. With the goal. Means for solving the problem
  • the present invention provides an audio signal input from a voice or a music source in an arousal level reduction preventing apparatus for preventing a reduction in the level of human arousal level.
  • a plurality of parameter changing means for changing each of the plurality of acoustic parameters, and one of the plurality of acoustic parameters at random or regularly during reproduction of the audio or music source signal 1
  • a plurality of acoustic parameters are selected, and the plurality of parameter changing means includes control means for changing the selected one or more acoustic parameters.
  • the present invention provides a method for preventing a decrease in arousal level for preventing a decrease in a person's arousal level, from among a plurality of acoustic parameters during reproduction of a voice or music source signal, or A parameter selection step of regularly selecting one or more acoustic parameters, and a parameter changing step of changing the selected one or more acoustic parameters with respect to a signal input from an audio or music source. It is characterized by.
  • the present invention provides a computer program for preventing a decrease in arousal level of a computer that causes a computer to prevent a decrease in arousal level from among a plurality of acoustic parameters during reproduction of a voice or music source signal. Or, regularly, a parameter selecting step for selecting one or more acoustic parameters, and a parameter changing step for changing the selected one or more acoustic parameters for a signal input from a voice or music source, It is characterized by having a computer execute.
  • FIG. 1 is a diagram showing a configuration example of a wakefulness reduction preventing device according to the present invention.
  • FIG. 2 is a flowchart for explaining arousal level reduction preventing processing.
  • Fig. 3 is a diagram showing an example of an output waveform of the audio source when the arousal level lowering prevention process is executed.
  • FIG. 4 is a diagram showing a configuration example of a wakefulness reduction preventing device according to another embodiment of the present invention.
  • FIG. 5 is a diagram showing a configuration of a conventional wakefulness reduction preventing device.
  • FIG. 1 is a diagram showing a configuration example of an arousal level lowering prevention apparatus 10 according to the present invention.
  • the arousal level reduction preventing apparatus 10 according to the present invention selects one or a plurality of acoustic parameters randomly or regularly from a plurality of acoustic parameters during reproduction of a signal of a voice or a music source, and selects the acoustic parameters. By changing the parameters, the arousal level of people is reduced with a low-cost configuration Is to prevent.
  • the arousal level lowering prevention apparatus 10 according to the present invention includes a control unit 11, a random time generation unit 12, a left / right balance change unit 13, a volume change unit 14, and a MUTE change unit 15. , An effect changing unit 16, a sound image position changing unit 17, switching switches 18 to 22, and a wakefulness reduction detecting unit 23.
  • the control unit 11 randomly or regularly selects one or a plurality of acoustic parameters from a plurality of acoustic parameters (left and right balance, volume, MUTE, effect, sound image), and the corresponding switching switch 18 to Random time (corresponding to random time) 22 between tl and t5.
  • acoustic parameters left and right balance, volume, MUTE, effect, sound image
  • the corresponding switching switch 18 to Random time (corresponding to random time) 22 between tl and t5.
  • the switch 18 is turned ON only during the random time tl and the left / right balance changing unit 13 is connected.
  • “Volume” is selected, the switch 19 is turned ON for the random time t2 and the volume changing unit 14 is connected.
  • the switch 20 is turned ON for the random time t3 and the MUT change unit 15 is connected.
  • switch 21 When “effect” is selected, switch 21 is turned on only during random time t4, and effect changer 16 is connected.
  • “sound image position” When “sound image position” is selected, the switch 22 is turned ON only during the random time t5 and the sound image position changing unit 17 is connected.
  • the dissatisfaction with the momentary tone being cut off or being played back can be eliminated by applying a fade of around 2 seconds instead of instantaneous switching. desirable. Further, the fade time may be changed.
  • a combination and order to be selected from a plurality of parameters may be determined and repeated.
  • the random time generation unit 12 generates random times tl, t2, t3, t4, and t5 at a predetermined cycle and outputs them to the control unit 11.
  • the random time tl, t2, t3, t4, t5 should be about 4 to 30 seconds. This is because if the time is too long, you get tired, and if it is too short, you get tired.
  • the switching switches 18 to 22 are signals of the left / right balance changing unit 13, the volume changing unit 14, the MUTE changing unit 15, the effect changing unit 16, and the sound image position changing unit 17 in accordance with the switching control signal from the control unit 11, respectively. Connect to the line ⁇ Disconnect.
  • the left / right balance changing unit 13 changes the left / right balance of the audio signal input from the music source.
  • the volume changing unit 14 changes the volume of the audio signal input from the music source. .
  • the MUTE changing unit 15 covers MUTE in the audio signal input from the music source. It should be noted that in order to eliminate the dissatisfaction that the music cannot be heard at all when the mute is turned on, it is desirable to leave a sound volume that can be heard with no sound when the mute is turned on.
  • the effect changing unit 16 changes the effect (tone) of the audio signal input from the music source.
  • the sound image position changing unit 17 changes the sound image position of the audio signal input from the music source.
  • the sound image position is changed based on the phase difference (time difference) and intensity difference of the sound reaching the left and right ears. Decreasing the left channel level of a song and delaying the time slightly will allow the sound to be heard from the right. In this way, by controlling the time difference and level between the left and right sounds, it is possible to change the position of the sound image so that it can be freely changed back and forth, left and right, and up and down. Furthermore, a more effective sound image localization can be obtained by arranging the speakers near the ears, for example, on both sides of the headrest of the driver's seat.
  • Each of these changing sections changes each parameter to continuous or non-continuous while being turned on by the changeover switch.
  • the arousal level reduction detection unit 23 detects physiological data of the subject, detects whether or not the subject is in the arousal reduced state, and outputs a wakefulness level signal (for example, the wakefulness level decreased state "1 ”, The arousal level maintenance state“ 0 ”) is output to the control unit 11.
  • a wakefulness level signal for example, the wakefulness level decreased state "1 ”.
  • the arousal level maintenance state“ 0 ” is output to the control unit 11.
  • Methods for detecting whether or not the subject is in a state of reduced arousal level using the subject's physiological data are disclosed in, for example, JP-A-2004-344269, JP-A-8-140949, JP-A-2003-. Since it is known in Japanese Patent No. 61939, etc., its detailed description is omitted.
  • FIG. 2 is a flowchart for explaining the arousal level lowering prevention process of the control unit 11.
  • control unit 11 executes the arousal level reduction process when the arousal level state signal input from the arousal level decrease detection unit 23 indicates the arousal level decreased state.
  • the random time generation unit 12 generates random times tl, t2, t3, t4, and t5 and outputs them to the control unit 11 (step Sl).
  • the control unit 11 randomly determines one or more acoustic parameters to be changed from among a plurality of acoustic parameters (left and right balance, volume, MUTE, effect, sound image position) (step S2).
  • Control unit 11 changes the “left / right balance” In this case, the switch 18 is turned ON for the random time tl, the left / right balance changing unit 13 is connected to the signal line, and the left / right balance of the audio signal input from the music source is changed for tl (step S3).
  • control unit 11 sets the switch 19 to “N” only for t2, connects the volume change unit 14 to the signal line, and adjusts the volume of the audio signal input from the music source. Is changed for t2 (step S4).
  • control unit 11 turns ON the switching switch 20 only for the random time t3, connects the MUTE changing unit 15 to the signal line, and outputs the audio signal input from the music source between t3. Mute the sound (Step S5).
  • control unit 11 turns on the switch 21 for t4, connects the effect change unit 16 to the signal line, and adjusts the effect of the audio signal input from the music source. Change for t4 (step S6).
  • control unit 11 connects the sound image position changing unit 17 to the signal line by inputting the switch 22 for the random time t5, and is input from the sound source. Change the sound image position of the audio signal for t5 (step S7).
  • the control unit 11 waits for one randomly selected time among the change times (tl, t2, t3, t4, t5) of the selected acoustic parameter (step S8), and then the control unit 11 Then, it is determined whether or not the wakefulness level lowering prevention process can be terminated (step S9), and if the wakefulness level signal input from the wakefulness level lowering detection unit 23 is the wakefulness level maintaining state, If the wakefulness state signal is in the state of reduced wakefulness, the process returns to step S1 and the same processing is performed until the wakefulness state signal becomes the state of maintaining wakefulness. Repeatedly.
  • the standby time in step S8 can be set to select the maximum value from tl to t5, or it can be set to select the minimum value.
  • FIG. 3 is a diagram showing an example of an output waveform of the audio source when the arousal level lowering prevention process is executed.
  • the left and right balance, volume, and mute are acoustic parameters. Show the R and L output waveforms of the music source when changed.
  • a plurality of parameter changing means for changing each of a plurality of acoustic parameters with respect to a signal input from a sound or music source (a left-right balance changing unit) 13, volume change unit 14, MUTE change unit 15, effect change unit 16, sound image position change unit 17) and during playback of the audio signal of the audio source, randomly or regularly from multiple acoustic parameters It is possible to select one or a plurality of acoustic parameters and to control a plurality of parameter changing means to change the selected one or a plurality of acoustic parameters, so that it is not necessary to prepare a special music source or equipment. With a low-cost configuration, it is possible to suppress drowsiness that does not cause discomfort to the user, that is, to prevent a reduction in arousal level.
  • the change time of the acoustic parameter is set to a random time, the effect of preventing the decrease in the arousal level is weakened by getting used to the change of the music. A decrease can be prevented.
  • multiple acoustic parameters are left / right balance, volume, MUTE, effect, and sound image position, parameters that are effective in reducing arousal level can be used in terms of acoustic psychology.
  • the random time is about 4 seconds to 30 seconds, it is possible to prevent users from getting bored or tired.
  • the computer 40 shown in the figure includes a CPU (Central Processing Unit) 41 that executes the above-described program, an input device 42 such as a keyboard and a mouse, and an ROM (Read Only Memory) that stores various data. 43, a RAM (Random Access Memory) 44 for storing calculation parameters, a reading device 45 for reading a program from a recording medium 50, and an output device 46 such as a display and a printer.
  • a CPU Central Processing Unit
  • an input device 42 such as a keyboard and a mouse
  • ROM Read Only Memory
  • 43 a RAM (Random Access Memory) 44 for storing calculation parameters
  • a reading device 45 for reading a program from a recording medium 50
  • an output device 46 such as a display and a printer.
  • the CPU 41 reads a program recorded on the recording medium 50 via the reading device 45. Then, the above-described functions are realized by executing the program.
  • Examples of the recording medium 50 include an optical disk, a flexible disk, and a hard disk.
  • the arousal level lowering prevention apparatus, the arousal level lowering prevention method, the arousal level lowering prevention program, and the recording medium according to the present invention are vehicles, ships, etc. It can be used mainly for vehicles such as trains and airplanes, and is particularly useful for car navigation systems, car audio systems, and other in-vehicle computer devices.

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Abstract

An arousal level lowering preventive device comprises a plurality of parameter changing means (a left-right balance changing section, a sound volume changing section, a MUTE changing section, an effect changing section, and a sound image position changing section) for changing sound parameters of a sound signal inputted from a sound source and a control section for selecting one or more sound parameters randomly or regularly from the sound parameters during reproduction of the sound signal and allowing the parameter changing means to change the selected one or more sound parameters. Consequently, lowering of the arousal level can be prevented with a low-cost constitution without giving the user a feeling of unpleasantness.

Description

明 細 書  Specification
覚醒度低下防止装置、覚醒度低下防止方法、覚醒度低下防止用プログ ラム、および記録媒体  Arousal level lowering prevention apparatus, arousal level lowering prevention method, arousal level lowering prevention program, and recording medium
技術分野  Technical field
[0001] 本発明は、覚醒度低下防止装置、覚醒度低下防止方法、覚醒度低下防止用プロ グラム、および記録媒体に関し、詳細には、人の覚醒度の低下を防止するための覚 醒度低下防止装置、覚醒度低下防止方法、覚醒度低下防止用プログラム、および 記録媒体に関する。  TECHNICAL FIELD [0001] The present invention relates to a wakefulness reduction prevention device, a wakefulness fall prevention method, a wakefulness fall prevention program, and a recording medium, and more specifically, a wakefulness level for preventing a decrease in human wakefulness level. The present invention relates to a fall prevention device, a wakefulness fall prevention method, a wakefulness fall prevention program, and a recording medium.
背景技術  Background art
[0002] 単調な作業時や運転時などには、作業者や運転者が覚醒度の低下を起こし、居眠 りをしてしまうといったことが起こりやすぐ従来から問題となっている。運転中に眠気 に襲われたときにその状態から脱するために、一般的には、エアコンの温度を下げた り、窓の開閉や飲食等に眠気解消の効果があるといわれている。しかし、調節した温 度に慣れてくると再び眠気が襲ってくることがあるし、同乗者がいれば調整した温度 に不快感を感じることも多い。また、飲食物がいつも手元にあるとは限らない。眠気の 発生は、単調な周囲環境が連続することにより起こり易レ、といわれる。これは、自らの 危険にかかわる状態が遠のレ、てレ、る状況と考えることもできる。  [0002] In the case of monotonous work or driving, it has been a problem from the past as soon as the worker and the driver have fallen awakened and fall asleep. In order to escape from sleepiness when driving, it is generally said that the temperature of the air conditioner is lowered, and the opening and closing of windows and eating and drinking are effective in eliminating sleepiness. However, once you get used to the adjusted temperature, you may feel sleepy again, and if you have a passenger, you will often feel uncomfortable with the adjusted temperature. Also, food and drink are not always at hand. It is said that drowsiness is likely to occur due to the continuous monotonous surrounding environment. This can be thought of as a situation where the state of danger is far away.
[0003] 運転者の眠気解消として、楽曲の 30秒程度の断続再生を行うことに、ガムのチュー イングと同程度の効果があるとされる。楽曲を断続再生することで覚醒度低下を防止 する装置として、例えば、特許文献 1が提案されている。図 5は、特許文献 1の覚醒度 低下防止装置の構成を示す図である。同文献の覚醒度低下防止装置は、図 5に示 すように、複数の異なるオーディオ機器 (ラジオ、カセットデッキ、 CDプレイヤー） 101 , 102, 103と、複数のオーディオ機器 101 , 102, 103を切り替える切換スィッチ 10 4と、所定のあるいは所定範囲のランダムな周期で、複数のオーディオ機器 101， 10 2, 103を切り替えて、断続的に所定期間音刺激を提示するように切換スィッチ 104 を制御する切り替え制御装置 105とを具備している。  [0003] In order to eliminate driver drowsiness, intermittent playback of music for about 30 seconds is said to have the same effect as chewing gum. For example, Patent Document 1 has been proposed as an apparatus for preventing a decrease in arousal level by intermittently playing back music. FIG. 5 is a diagram showing a configuration of the arousal level lowering prevention apparatus of Patent Document 1. As shown in FIG. As shown in FIG. 5, the device for preventing arousal level reduction in the same document switches between a plurality of different audio devices (radio, cassette deck, CD player) 101, 102, 103 and a plurality of audio devices 101, 102, 103. A switch that controls the switching switch 104 so as to intermittently present a sound stimulus for a predetermined period by switching between a plurality of audio devices 101, 102, and 103 at a predetermined cycle or a random cycle within a predetermined range. And a control device 105.
[0004] すなわち、同文献の覚醒度低下防止装置は、複数の音楽ソースを構成し、選択さ れたソースに対して断続再生を行う。ここで、複数の音楽ソースを用いる理由は、曲 に対する嗜好、曲に穏やかな曲が含まれている場合、同一ソースの楽曲に対する慣 れ、ラジオなど受信できなくなった場合などに他の媒体に切り替える必要があるため である。 [0004] That is, the apparatus for preventing arousal level reduction in the same document constitutes a plurality of music sources and is selected. Play intermittently on the selected source. Here, the reason for using multiple music sources is to switch to another medium when there is a preference for songs, when songs contain mild songs, accustomed to songs from the same source, or when it becomes impossible to receive radio etc. This is necessary.
[0005] 特許文献 1 :特開 2002— 149348号公報  [0005] Patent Document 1: JP 2002-149348 A
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0006] し力しながら、上記従来技術では，複数のオーディオ機器や音源ソースなどが必要 であるため、構成が複雑となり高価になるという問題がある。また、断続音に眠気を解 消する効果があるとしても、利用者にとっては無音時に音楽が聞けないことへの不満 や、瞬時に楽音が切れたり再生されたりすることへの苛立ちから、不快感を感じるとい う問題がある。 [0006] However, the above-described prior art requires a plurality of audio devices, sound source, and the like, and thus has a problem that the configuration becomes complicated and expensive. In addition, even if the intermittent sound has the effect of relieving drowsiness, the user may feel uncomfortable because of dissatisfaction with not being able to listen to music when there is no sound or frustration that the musical sound is interrupted or played instantly. There is a problem of feeling.
[0007] ところで、人は複数の音源から到来する音の混合の中から、特定の音源の音だけを 抽出して聞くことができる。これらのうち、同一の音源から発せられた成分の間には、 周波数 ·強さ'到来する方向などの変化が同様に起こることを敏感に識別することが できる。これは、音の混合物の各成分を音源毎に正しくグループ化して理解するプロ セスを身につけているからである。音響心理学によれば、なぜ 2つの耳が必要である 力、といえば、大昔から人や動物にとって、忍び寄る外敵や獲物の位置を知ることは自 らの命にかかわることであり、 2つの耳の重要性もそこにあったといわれる。現代でも、 たとえば車が近づいてくれば、それが見えなくても注意が向くがこれも同じことである 。音の到来方向は、音源から左右の耳に届く時間差によって認識していることが知ら れている。また、後方からの音については、時間差に加えて、耳や頭などによって変 化する音質を、 日常の学習によって認識しているといわれている。  [0007] By the way, a person can extract and listen to only the sound of a specific sound source from a mixture of sounds coming from a plurality of sound sources. Among these, it is possible to sensitively identify that the change in the frequency / intensity 'arrival direction, etc., occurs similarly between the components emitted from the same sound source. This is because we have a process to correctly group and understand each component of the sound mixture for each sound source. According to psychoacoustics, why the power of two ears is necessary, because for a long time humans and animals knowing the position of sneaking foreign enemies and prey is a matter of their lives. The importance of is said to have been there. Even in modern times, for example, if a car is approaching, attention will be paid even if it is not visible, but this is also the same. It is known that the direction of sound arrival is recognized by the time difference from the sound source to the left and right ears. In addition, it is said that the sound from the back is recognized by daily learning in addition to the time difference and the sound quality that changes with the ears and head.
[0008] 本発明は、上記課題に鑑みてなされたものであり、上記音響心理学を考慮して、音 像の位置や音量，音質を信号の再生中に変更することにより，低コストな構成で、利 用者に不快感を与えることなく覚醒度の低下を防止することが可能な覚醒度低下防 止装置、覚醒度低下防止方法、覚醒度低下防止用プログラム、および記録媒体を提 供することを目的とする。 課題を解決するための手段 [0008] The present invention has been made in view of the above problems, and in consideration of the psychoacoustics described above, by changing the position, volume, and sound quality of a sound image during signal reproduction, a low-cost configuration is achieved. And providing a device for preventing a decrease in arousal level, a method for preventing a decrease in arousal level, a program for preventing a decrease in arousal level, and a recording medium. With the goal. Means for solving the problem
[0009] 上述した課題を解決し、 目的を達成するために、本発明は、人の覚醒度の低下を 防止するための覚醒度低下防止装置において、音声もしくは楽曲ソースから入力さ れる音声信号に対して、複数の音響パラメータを各々変更するための複数のパラメ ータ変更手段と、音声もしくは楽曲ソースの信号の再生中に、前記複数の音響パラメ ータの中から無作為または規則的に 1または複数の音響パラメータを選択し、前記複 数のパラメータ変更手段に、選択した 1または複数の音響パラメータを変更させる制 御手段と、を備えたことを特徴とする。  [0009] In order to solve the above-described problems and achieve the object, the present invention provides an audio signal input from a voice or a music source in an arousal level reduction preventing apparatus for preventing a reduction in the level of human arousal level. On the other hand, a plurality of parameter changing means for changing each of the plurality of acoustic parameters, and one of the plurality of acoustic parameters at random or regularly during reproduction of the audio or music source signal 1 Or, a plurality of acoustic parameters are selected, and the plurality of parameter changing means includes control means for changing the selected one or more acoustic parameters.
[0010] また、本発明は、人の覚醒度の低下を防止するための覚醒度低下防止方法におい て、音声もしくは楽曲ソースの信号の再生中に、複数の音響パラメータの中から無作 為または規則的に 1または複数の音響パラメータを選択するパラメータ選択工程と、 音声もしくは楽曲ソースから入力される信号に対して、前記選択した 1または複数の 音響パラメータを変更するパラメータ変更工程と、を含むことを特徴とする。  [0010] Further, the present invention provides a method for preventing a decrease in arousal level for preventing a decrease in a person's arousal level, from among a plurality of acoustic parameters during reproduction of a voice or music source signal, or A parameter selection step of regularly selecting one or more acoustic parameters, and a parameter changing step of changing the selected one or more acoustic parameters with respect to a signal input from an audio or music source. It is characterized by.
[0011] また、本発明は、コンピュータに、人の覚醒度の低下を防止させる覚醒度低下防止 用プログラムにおいて、音声もしくは楽曲ソースの信号の再生中に、複数の音響パラ メータの中から無作為または規則的に、 1または複数の音響パラメータを選択するパ ラメータ選択工程と、音声もしくは楽曲ソースから入力される信号に対して、前記選択 した 1または複数の音響パラメータを変更するパラメータ変更工程と、をコンピュータ に実行させることを特徴とする。 [0011] In addition, the present invention provides a computer program for preventing a decrease in arousal level of a computer that causes a computer to prevent a decrease in arousal level from among a plurality of acoustic parameters during reproduction of a voice or music source signal. Or, regularly, a parameter selecting step for selecting one or more acoustic parameters, and a parameter changing step for changing the selected one or more acoustic parameters for a signal input from a voice or music source, It is characterized by having a computer execute.
図面の簡単な説明  Brief Description of Drawings
[0012] [図 1]図 1は、本発明に係る覚醒度低下防止装置の構成例を示す図である。  FIG. 1 is a diagram showing a configuration example of a wakefulness reduction preventing device according to the present invention.
[図 2]図 2は、覚醒度低下防止処理を説明するためのフローチャートである。  FIG. 2 is a flowchart for explaining arousal level reduction preventing processing.
[図 3]図 3は、覚醒度低下防止処理を実行した場合の音声ソースの出力波形の一例 を示す図である。  [Fig. 3] Fig. 3 is a diagram showing an example of an output waveform of the audio source when the arousal level lowering prevention process is executed.
[図 4]図 4は、本発明の他の実施例に係る覚醒度低下防止装置の構成例を示す図で ある。  FIG. 4 is a diagram showing a configuration example of a wakefulness reduction preventing device according to another embodiment of the present invention.
[図 5]図 5は、従来の覚醒度低下防止装置の構成を示す図である。  FIG. 5 is a diagram showing a configuration of a conventional wakefulness reduction preventing device.
符号の説明 I1— Explanation of symbols I 1 —
CO 覚醒度低下防止装置  CO awakening prevention device
11 制御部  11 Control unit
〇  Yes
12 乱数時間発生部  12 Random time generator
13 左右バランス変更部  13 Left / right balance change section
14 7曰?里亦^ L軍叉 R  14 7 曰 曰 里 亦 ^ L Fork R
P  P
15 MUTE変更部  15 MUTE change section
16 エフェクト変更部  16 Effect change section
17 音像位置変更部  17 Sound image position change section
18, 19， 20, 21 , 22 切換スィッチ  18, 19, 20, 21, 22 switch
23 覚醒度低下検出部  23 Depression level detector
40 コンピュータ  40 computers
41 CPU  41 CPU
42 入力装置  42 Input devices
43 ROM  43 ROM
44 RAM  44 RAM
45 読取装置  45 Reader
46 出力装置  46 Output device
50 記録媒体  50 recording media
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0014] 以下に、この発明につき最良な実施の形態を詳細に説明する。なお、この実施の 形態によりこの発明が限定されるものではなぐまた、実施の形態の中で説明されて レ、る特徴の組み合わせのすべてが発明の解決手段に必要であるとは限らない。また 、下記実施の形態における構成要素には、当業者が容易に想定できるものまたは実 質的に同一のものが含まれる。  [0014] The best mode of the present invention will be described in detail below. It should be noted that the present invention is not limited by this embodiment, and all the combinations of features described in the embodiment are not necessarily required for the solution means of the invention. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.
[0015] 図 1は、本発明に係る覚醒度低下防止装置 10の構成例を示す図である。本発明に 係る覚醒度低下防止装置 10は、音声もしくは楽曲ソースの信号の再生中に、複数の 音響パラメータの中から無作為または規則的に、 1または複数の音響パラメータを選 択してその音響パラメータを変更することにより、低コストな構成で人の覚醒度の低下 を防止するものである。本発明に係る覚醒度低下防止装置 10は、図 1に示すように、 制御部 11と、乱数時間発生部 12と、左右バランス変更部 13と、音量変更部 14と、 M UTE変更部 15と、エフェクト変更部 16と、音像位置変更部 17と、切換スィッチ 18〜 22と、覚醒度低下検出部 23とを備えている。 FIG. 1 is a diagram showing a configuration example of an arousal level lowering prevention apparatus 10 according to the present invention. The arousal level reduction preventing apparatus 10 according to the present invention selects one or a plurality of acoustic parameters randomly or regularly from a plurality of acoustic parameters during reproduction of a signal of a voice or a music source, and selects the acoustic parameters. By changing the parameters, the arousal level of people is reduced with a low-cost configuration Is to prevent. As shown in FIG. 1, the arousal level lowering prevention apparatus 10 according to the present invention includes a control unit 11, a random time generation unit 12, a left / right balance change unit 13, a volume change unit 14, and a MUTE change unit 15. , An effect changing unit 16, a sound image position changing unit 17, switching switches 18 to 22, and a wakefulness reduction detecting unit 23.
[0016] 制御部 11は、無作為または規則的に、複数の音響パラメータ (左右バランス、音量 、 MUTE,エフェクト、音像）の中から 1または複数の音響パラメータを選択し、対応 する切換スィッチ 18〜22を対応する乱数時間（ランダムな時間） tl〜t5の間〇Nす る。具体的には、「左右バランス」を選択した場合には、乱数時間 tl間だけ切換スイツ チ 18を ONし、左右バランス変更部 13を接続する。また、「音量」を選択した場合は、 乱数時間 t2間だけ切換スィッチ 19を〇Nし、音量変更部 14を接続する。また、 MUT E変更モードを変更した場合には、乱数時間 t3だけ切換スィッチ 20を ONし、 MUT E変更部 15を接続する。また、「エフェクト」を選択する場合には、乱数時間 t4間だけ 切換スィッチ 21を ONし、エフェクト変更部 16を接続する。また、「音像位置」を選択 した場合には、乱数時間 t5間だけ切換スィッチ 22を ONして、音像位置変更部 17を 接続する。なお、各パラメータを変更する場合には、瞬時の切り替えとはせずに、 2秒 前後のフェードをかけることにより、瞬時に楽音が切れたり再生されたりすることに対 する不満を解消するのが望ましい。さらに、このフェード時間を変更してもよい。ここで 、 1または複数の音響パラメータを規則的に選択する一例として、複数のパラメータの うち選択する組み合わせ及び順番を決めておき、それを繰り返すことが挙げられる。  [0016] The control unit 11 randomly or regularly selects one or a plurality of acoustic parameters from a plurality of acoustic parameters (left and right balance, volume, MUTE, effect, sound image), and the corresponding switching switch 18 to Random time (corresponding to random time) 22 between tl and t5. Specifically, when “left / right balance” is selected, the switch 18 is turned ON only during the random time tl and the left / right balance changing unit 13 is connected. If “Volume” is selected, the switch 19 is turned ON for the random time t2 and the volume changing unit 14 is connected. When the MUT E change mode is changed, the switch 20 is turned ON for the random time t3 and the MUT change unit 15 is connected. When “effect” is selected, switch 21 is turned on only during random time t4, and effect changer 16 is connected. When “sound image position” is selected, the switch 22 is turned ON only during the random time t5 and the sound image position changing unit 17 is connected. In addition, when changing each parameter, the dissatisfaction with the momentary tone being cut off or being played back can be eliminated by applying a fade of around 2 seconds instead of instantaneous switching. desirable. Further, the fade time may be changed. Here, as an example of regularly selecting one or a plurality of acoustic parameters, a combination and order to be selected from a plurality of parameters may be determined and repeated.
[0017] 乱数時間発生部 12は、所定周期で、乱数時間 tl , t2, t3， t4, t5を生成して、制 御部 11に出力する。ここで、乱数時間 tl , t2, t3, t4, t5は、実験により、 4秒〜 30 秒程度が良いことが確認されている。時間が長すぎると飽きるし、短すぎると疲れるた めである。  The random time generation unit 12 generates random times tl, t2, t3, t4, and t5 at a predetermined cycle and outputs them to the control unit 11. Here, it has been confirmed by experiments that the random time tl, t2, t3, t4, t5 should be about 4 to 30 seconds. This is because if the time is too long, you get tired, and if it is too short, you get tired.
[0018] 切換スィッチ 18〜22は、それぞれ、制御部 11からの切換制御信号に従って、左右 バランス変更部 13、音量変更部 14、 MUTE変更部 15、エフェクト変更部 16、音像 位置変更部 17の信号ラインへの接続 ·非接続を行う。  [0018] The switching switches 18 to 22 are signals of the left / right balance changing unit 13, the volume changing unit 14, the MUTE changing unit 15, the effect changing unit 16, and the sound image position changing unit 17 in accordance with the switching control signal from the control unit 11, respectively. Connect to the line · Disconnect.
[0019] 左右バランス変更部 13は、音楽ソースから入力される音声信号の左右バランスを 変更する。音量変更部 14は、音楽ソースから入力される音声信号の音量を変更する 。 MUTE変更部 15は音楽ソースから入力される音声信号に MUTEをカ卩える。なお 、ミュート時に楽曲がまったく聞けないことへの不満を解消するために、ミュートを ON したときには全くの無音でなぐかすかに聞こえる程度の音量を残すことが望ましい。 エフェクト変更部 16は、音楽ソースから入力される音声信号のエフェクト（音色）を変 更する。音像位置変更部 17は音楽ソースから入力される音声信号の音像位置を変 更する。ここで、音像位置の変更は、方向の知覚は左右の耳に届く音の位相差（時 間差）と強度差を基本として行う。ある楽曲の左チャンネルのレベルを小さくして、時 間を少し遅らせると音は右の方から聞こえるようになる。このようにして、左右の音の 時間差とレベルを制御することによって音像の位置を聞く人の前後、左右，上下自在 に変ィ匕させること力 Sできる。さらに、スピーカを耳元の近くとして、例えば運転席のへッ ドレスト部の両脇などに配置することにより、より効果的な音像定位感を得ることがで きる。これは、スピーカから耳までの空間特性による影響を排除できるので、音響処 理された左右の信号をそのままそれぞれの耳に入力できるので、音像定位感の効果 を最大にできるようになるためである。これらの各変更部は、切換スィッチにより ONさ れている間、各パラメータを連続もしくは非連続に変更する。 [0019] The left / right balance changing unit 13 changes the left / right balance of the audio signal input from the music source. The volume changing unit 14 changes the volume of the audio signal input from the music source. . The MUTE changing unit 15 covers MUTE in the audio signal input from the music source. It should be noted that in order to eliminate the dissatisfaction that the music cannot be heard at all when the mute is turned on, it is desirable to leave a sound volume that can be heard with no sound when the mute is turned on. The effect changing unit 16 changes the effect (tone) of the audio signal input from the music source. The sound image position changing unit 17 changes the sound image position of the audio signal input from the music source. Here, the sound image position is changed based on the phase difference (time difference) and intensity difference of the sound reaching the left and right ears. Decreasing the left channel level of a song and delaying the time slightly will allow the sound to be heard from the right. In this way, by controlling the time difference and level between the left and right sounds, it is possible to change the position of the sound image so that it can be freely changed back and forth, left and right, and up and down. Furthermore, a more effective sound image localization can be obtained by arranging the speakers near the ears, for example, on both sides of the headrest of the driver's seat. This is because the effects of spatial characteristics from the speaker to the ears can be eliminated, and the left and right signals that have been acoustically processed can be directly input to the respective ears, so that the effect of sound image localization can be maximized. . Each of these changing sections changes each parameter to continuous or non-continuous while being turned on by the changeover switch.
[0020] 覚醒度低下検出部 23は、対象者の生理データを検出して、対象者が覚醒低下状 態にあるか否かを検出し、覚醒度状態信号 (例えば、覚醒度低下状態「1」、覚醒度 維持状態「0」）を制御部 11に出力する。対象者の生理データを使用して、対象者が 覚醒度低下状態にあるか否かを検出する方法は、例えば、特開 2004— 344269号 公報，特開平 8— 140949号公報、特開 2003— 61939号公報等で公知であるので その詳細な説明は省略する。  [0020] The arousal level reduction detection unit 23 detects physiological data of the subject, detects whether or not the subject is in the arousal reduced state, and outputs a wakefulness level signal (for example, the wakefulness level decreased state "1 ”, The arousal level maintenance state“ 0 ”) is output to the control unit 11. Methods for detecting whether or not the subject is in a state of reduced arousal level using the subject's physiological data are disclosed in, for example, JP-A-2004-344269, JP-A-8-140949, JP-A-2003-. Since it is known in Japanese Patent No. 61939, etc., its detailed description is omitted.
[0021] 図 2は、制御部 11の覚醒度低下防止処理を説明するためのフローチャートである。  FIG. 2 is a flowchart for explaining the arousal level lowering prevention process of the control unit 11.
図 2において、制御部 11は、覚醒度低下検出部 23から入力される覚醒度状態信号 が覚醒度低下状態を示す場合に、覚醒度低下処理を実行する。  In FIG. 2, the control unit 11 executes the arousal level reduction process when the arousal level state signal input from the arousal level decrease detection unit 23 indicates the arousal level decreased state.
[0022] 図 2において、乱数時間発生部 12は、乱数時間 tl， t2， t3, t4, t5を生成して、制 御部 11に出力する (ステップ Sl)。制御部 11は、無作為に、複数の音響パラメータ（ 左右バランス、音量、 MUTE、エフヱタト、音像位置）の中から変更する音響パラメ一 タを、 1または複数決定する（ステップ S 2)。制御部 11は、「左右バランス」を変更する 場合には、切換スィッチ 18を乱数時間 tl間 ONにして、左右バランス変更部 13を信 号ラインに接続し、音楽ソースから入力される音声信号の左右バランスを tl間変更す る（ステップ S3)。また、制御部 11は、「音量」を変更する場合には、 t2間だけ切換ス イッチ 19を〇Nし、音量変更部 14を信号ラインに接続し、音楽ソースから入力される 音声信号の音量を t2間変更する（ステップ S4)。また、制御部 11は、「MUTE」を変 更する場合は、乱数時間 t3だけ切換スィッチ 20を ONし、 MUTE変更部 15を信号 ラインに接続し、音楽ソースから入力される音声信号に t3間ミュートをかける（ステツ プ S5)。また、制御部 11は、「エフェクト」を変更する場合には、 t4間だけ切換スイツ チ 21を ONし、エフェクト変更部 16を信号ラインに接続し、音楽ソースから入力される 音声信号のエフェクトを t4間変更する (ステップ S6)。また、制御部 11は、「音像位置 」を選択した場合には、乱数時間 t5間だけ切換スィッチ 22を〇Nして、音像位置変更 部 17を信号ラインに接続し、音源ソースから入力される音声信号の音像位置を t5間 変更する（ステップ S 7)。 In FIG. 2, the random time generation unit 12 generates random times tl, t2, t3, t4, and t5 and outputs them to the control unit 11 (step Sl). The control unit 11 randomly determines one or more acoustic parameters to be changed from among a plurality of acoustic parameters (left and right balance, volume, MUTE, effect, sound image position) (step S2). Control unit 11 changes the “left / right balance” In this case, the switch 18 is turned ON for the random time tl, the left / right balance changing unit 13 is connected to the signal line, and the left / right balance of the audio signal input from the music source is changed for tl (step S3). . In addition, when changing the “volume”, the control unit 11 sets the switch 19 to “N” only for t2, connects the volume change unit 14 to the signal line, and adjusts the volume of the audio signal input from the music source. Is changed for t2 (step S4). In addition, when changing the “MUTE”, the control unit 11 turns ON the switching switch 20 only for the random time t3, connects the MUTE changing unit 15 to the signal line, and outputs the audio signal input from the music source between t3. Mute the sound (Step S5). In addition, when changing the “effect”, the control unit 11 turns on the switch 21 for t4, connects the effect change unit 16 to the signal line, and adjusts the effect of the audio signal input from the music source. Change for t4 (step S6). In addition, when “sound image position” is selected, the control unit 11 connects the sound image position changing unit 17 to the signal line by inputting the switch 22 for the random time t5, and is input from the sound source. Change the sound image position of the audio signal for t5 (step S7).
[0023] そして、制御部 11は、選択した音響パラメータの変更時間（tl, t2, t3, t4, t5)の うちランダムに選んだ 1の時間だけ待機した後（ステップ S8)、制御部 11は、覚醒度 低下防止処理を終了可能か否かを判断し (ステップ S9)、覚醒度低下検出部 23から 入力される覚醒度状態信号が覚醒度維持状態である場合には、覚醒度低下防止処 理を終了（ステップ S 9の「Yes」 )する一方、覚醒度状態信号が覚醒度低下状態であ る場合には、ステップ S1に戻り、覚醒度状態信号が覚醒度維持状態となるまで同じ 処理を繰り返し実行する。尚、ステップ S8での待機時間は、 tl〜t5のうち最大値を 選ぶように設定しても良レ、し、最小値を選ぶように設定しても良レ、。  [0023] Then, the control unit 11 waits for one randomly selected time among the change times (tl, t2, t3, t4, t5) of the selected acoustic parameter (step S8), and then the control unit 11 Then, it is determined whether or not the wakefulness level lowering prevention process can be terminated (step S9), and if the wakefulness level signal input from the wakefulness level lowering detection unit 23 is the wakefulness level maintaining state, If the wakefulness state signal is in the state of reduced wakefulness, the process returns to step S1 and the same processing is performed until the wakefulness state signal becomes the state of maintaining wakefulness. Repeatedly. The standby time in step S8 can be set to select the maximum value from tl to t5, or it can be set to select the minimum value.
[0024] なお、覚醒度低下防止処理を実行する場合には、利用者は楽曲の変化に対して「 機器の調子が悪くなつたのでは · ·？」という懸念を抱く可能性があるため、覚醒度低 下防止処理を実行する場合に、その前後に開始と終了を告げるメッセージをァナウ ンスするのが望ましい。なお、覚醒度低下防止装置 10に入力されるソースとしては、 音声ソースや楽曲ソース等の各種のものを適用可能である。  [0024] It should be noted that when executing the arousal level lowering prevention process, the user may have a concern about the change in the music, "Is the device going bad?" It is desirable to announce a message that tells the start and end before and after the arousal level lowering prevention process. Note that various sources such as an audio source and a music source can be applied as a source input to the arousal level lowering prevention apparatus 10.
[0025] 図 3は、覚醒度低下防止処理を実行した場合の音声ソースの出力波形の一例を示 す図である。同図では、音響パラメータとして、左右バランス、音量、およびミュートを 変更した場合の音楽ソースの R、 L出力波形を示してレ、る。 FIG. 3 is a diagram showing an example of an output waveform of the audio source when the arousal level lowering prevention process is executed. In the figure, the left and right balance, volume, and mute are acoustic parameters. Show the R and L output waveforms of the music source when changed.
[0026] 以上説明したように、本実施の形態によれば、音声もしくは楽曲ソースから入力され る信号に対して、複数の音響パラメータを各々変更するための複数のパラメータ変更 手段 (左右バランス変更部 13、音量変更部 14、 MUTE変更部 15、エフェクト変更部 16、音像位置変更部 17)と、音声ソースの音声信号の再生中に、複数の音響パラメ ータの中から無作為または規則的に、 1または複数の音響パラメータを選択し、複数 のパラメータ変更手段に、選択した 1または複数の音響パラメータを変更させる制御 部 11とを備えているので、特別な音楽ソースや機材を用意することなぐ低コストな構 成で、利用者に不快感を与えることなぐ眠気を抑えること、すなわち、覚醒度の低下 を防止すること力できる。  [0026] As described above, according to the present embodiment, a plurality of parameter changing means for changing each of a plurality of acoustic parameters with respect to a signal input from a sound or music source (a left-right balance changing unit) 13, volume change unit 14, MUTE change unit 15, effect change unit 16, sound image position change unit 17) and during playback of the audio signal of the audio source, randomly or regularly from multiple acoustic parameters It is possible to select one or a plurality of acoustic parameters and to control a plurality of parameter changing means to change the selected one or a plurality of acoustic parameters, so that it is not necessary to prepare a special music source or equipment. With a low-cost configuration, it is possible to suppress drowsiness that does not cause discomfort to the user, that is, to prevent a reduction in arousal level.
[0027] また、音響パラメータの変更時間をランダムな時間とすることとしたので、音楽の変 化に慣れてしまうことで覚醒度の低下を防止する効果が弱まるということがなぐより覚 醒度の低下を防止することができる。また、複数の音響パラメータを、左右バランス、 音量、 MUTE、エフェクト、および音像位置であることとしたので、音響心理学上、覚 醒度の低下に有効なパラメータを使用することができる。また、ランダムな時間を、約 4秒〜 30秒としたので、利用者に飽きや疲れを感じさせることを防止できる。  [0027] In addition, since the change time of the acoustic parameter is set to a random time, the effect of preventing the decrease in the arousal level is weakened by getting used to the change of the music. A decrease can be prevented. In addition, since multiple acoustic parameters are left / right balance, volume, MUTE, effect, and sound image position, parameters that are effective in reducing arousal level can be used in terms of acoustic psychology. In addition, since the random time is about 4 seconds to 30 seconds, it is possible to prevent users from getting bored or tired.
[0028] 以上本発明に力かる一実施の形態について図面を参照して詳述してきた力 具体 的な構成例はこの一実施例に限られるものではなぐ本発明の要旨を逸脱しない範 囲の設計変更等があっても本発明に含まれる。例えば、上記図 1の覚醒度低下防止 装置 10の機能を実現するためのプログラムを図 4に示したコンピュータ読み取り可能 な記録媒体 50に記録して、この記録媒体 50に記録されたプログラムを同図に示した コンピュータ 40に読み込ませ、実行することにより各機能を実現してもよい。  [0028] The force that has been described in detail with reference to the drawings for an embodiment that is effective in the present invention. The specific configuration example is not limited to the one embodiment, and does not depart from the gist of the present invention. Any design changes are included in the present invention. For example, a program for realizing the function of the arousal level lowering prevention device 10 in FIG. 1 is recorded in the computer-readable recording medium 50 shown in FIG. 4, and the program recorded in the recording medium 50 is shown in FIG. Each function may be realized by causing the computer 40 shown in FIG.
[0029] 同図に示したコンピュータ 40は、上記プログラムを実行する CPU (Central Process ing Unit) 41と、キーボード、マウス等の入力装置 42と、各種データを記憶する R〇 M (Read Only Memory) 43と、演算パラメータ等を記憶する RAM (Random Access Memory) 44と、記録媒体 50からプログラムを読み取る読取装置 45と、ディスプレイ 、プリンタ等の出力装置 46とから構成されている。  [0029] The computer 40 shown in the figure includes a CPU (Central Processing Unit) 41 that executes the above-described program, an input device 42 such as a keyboard and a mouse, and an ROM (Read Only Memory) that stores various data. 43, a RAM (Random Access Memory) 44 for storing calculation parameters, a reading device 45 for reading a program from a recording medium 50, and an output device 46 such as a display and a printer.
[0030] CPU41は、読取装置 45を経由して記録媒体 50に記録されているプログラムを読 み込んだ後、プログラムを実行することにより、前述した機能を実現する。なお、記録 媒体 50としては、光ディスク、フレキシブルディスク、ハードディスク等が挙げられる。 産業上の利用可能性 The CPU 41 reads a program recorded on the recording medium 50 via the reading device 45. Then, the above-described functions are realized by executing the program. Examples of the recording medium 50 include an optical disk, a flexible disk, and a hard disk. Industrial applicability
以上のように、本発明に係る覚醒度低下防止装置、覚醒度低下防止方法、覚醒度 低下防止用プログラム、および記録媒体は、操作者の覚醒度の低下が危険につな がる車、船舶、列車、飛行機等の乗り物に主として利用でき、特に、カーナビグーショ ン，カーオーディオ，その他車載コンピュータ装置に有用である。  As described above, the arousal level lowering prevention apparatus, the arousal level lowering prevention method, the arousal level lowering prevention program, and the recording medium according to the present invention are vehicles, ships, etc. It can be used mainly for vehicles such as trains and airplanes, and is particularly useful for car navigation systems, car audio systems, and other in-vehicle computer devices.

Claims

請求の範囲 The scope of the claims
[1] 人の覚醒度の低下を防止するための覚醒度低下防止装置において、  [1] In a wakefulness reduction prevention device for preventing a decrease in wakefulness of a person,
音声もしくは楽曲ソースから入力される信号に対して、複数の音響パラメータを各々 変更するための複数のパラメータ変更手段と、  A plurality of parameter changing means for changing each of a plurality of acoustic parameters for a signal input from a sound or music source;
前記音声もしくは楽曲ソースの信号の再生中に、前記複数の音響パラメータの中か ら無作為または規則的に、 1または複数の音響パラメータを選択し、前記複数のパラ メータ変更手段に、選択した 1または複数の音響パラメータを変更させる制御手段と を備えたことを特徴とする覚醒度低下防止装置。  During playback of the signal of the voice or music source, one or more acoustic parameters are selected randomly or regularly from the plurality of acoustic parameters, and the selected one is selected by the plurality of parameter changing means. Or a control means for changing a plurality of acoustic parameters.
[2] 前記制御手段は、ランダムな時間、前記複数のノ メータ変更手段に、選択した 1 または複数の音響パラメータを変更させることを特徴とする請求項 1に記載の覚醒度 低下防止装置。  [2] The device for preventing a decrease in arousal level according to claim 1, wherein the control unit causes the plurality of parameter changing units to change the selected one or more acoustic parameters for a random time.
[3] 前記複数の音響パラメータは、左右バランス、音量、 MUTE、エフェクト、および音 像位置であることを特徴とする請求項 1に記載の覚醒度低下防止装置。  [3] The apparatus according to claim 1, wherein the plurality of acoustic parameters are left-right balance, volume, MUTE, effect, and sound image position.
[4] 前記ランダムな時間は、約 4秒〜 30秒であることを特徴とする請求項 1に記載の覚 醒度低下防止装置。  [4] The apparatus of claim 1, wherein the random time is approximately 4 to 30 seconds.
[5] さらに、人の生理データに基づいて、覚醒度の低下を検出する覚醒度低下検出手 段を備え、  [5] Furthermore, a wakefulness decrease detection means for detecting a decrease in wakefulness based on human physiological data is provided.
前記制御手段は、前記覚醒度低下検出手段で覚醒度の低下が検出された場合に 、前記複数の音響パラメータの中から無作為または規則的に、 1または複数の音響 パラメータを選択し、前記複数のパラメータ変更手段に、選択した 1または複数の音 響パラメータを変更させることを特徴とする請求項 1に記載の覚醒度低下防止装置。  The control means selects one or a plurality of acoustic parameters randomly or regularly from the plurality of acoustic parameters when a decrease in arousal level is detected by the arousal level decrease detection means, 2. The wakefulness reduction preventing device according to claim 1, wherein the parameter changing means changes one or more selected sound parameters.
[6] 人の覚醒度の低下を防止するための覚醒度低下防止方法において、 [6] In a method for preventing a decrease in arousal level to prevent a decrease in a person's arousal level,
音声もしくは楽曲ソースの信号の再生中に、複数の音響パラメータの中から無作為 ,もしくは特定の順序に 1または複数の音響パラメータを選択するパラメータ選択ェ 程と、  A parameter selection process for selecting one or more acoustic parameters randomly or in a specific order from a plurality of acoustic parameters during playback of a signal of a voice or music source;
前記音声もしくは楽曲ソースから入力される信号に対して、前記選択した 1または複 数の音響パラメータを変更するパラメータ変更工程と、 を含むことを特徴とする覚醒度低下防止方法。 A parameter changing step for changing the selected one or more acoustic parameters with respect to a signal input from the sound or music source; A method for preventing a reduction in arousal level, comprising:
[7] コンピュータに、人の覚醒度の低下を防止させる覚醒度低下防止用プログラムにお いて、 [7] In a program for preventing a decrease in arousal level that causes a computer to prevent a decrease in arousal level,
音声もしくは楽曲ソースの信号の再生中に、複数の音響パラメータの中から無作為 ,または規則的に 1または複数の音響パラメータを選択するパラメータ選択工程と、 前記音声もしくは楽曲ソースから入力される信号に対して、前記選択した 1または複 数の音響パラメータを変更するパラメータ変更工程と、  A parameter selection step for selecting one or more acoustic parameters randomly or regularly from a plurality of acoustic parameters during reproduction of a signal of the audio or music source, and a signal input from the audio or music source On the other hand, a parameter changing step for changing the selected one or more acoustic parameters;
をコンピュータに実行させることを特徴とする覚醒度低下防止用プログラム。  A program for preventing a decrease in arousal level, characterized in that a computer is executed.
[8] 音声もしくは楽曲ソースの信号の再生中に、複数の音響パラメータの中から無作為 ,または規則的に 1または複数の音響パラメータを選択するパラメータ選択工程と、 前記音声もしくは楽曲ソースから入力される信号に対して、前記選択した 1または複 数の音響パラメータを変更するパラメータ変更工程と、 [8] A parameter selection step of randomly or regularly selecting one or a plurality of acoustic parameters from a plurality of acoustic parameters during playback of a signal of a speech or a music source; A parameter changing step for changing the selected one or more acoustic parameters for a signal to be transmitted;
をコンピュータに実行させる覚醒度低下防止用プログラムを格納したことを特徴とす るコンピュータが読み取り可能な記録媒体。  A computer-readable recording medium characterized by storing a program for preventing a decrease in arousal level that causes a computer to execute the above.
PCT/JP2006/305051 2005-03-31 2006-03-14 Arousal level lowering preventive device, arousal level lowering preventive method, arousal level lowering preventive program, and recording medium WO2006109390A1 (en)

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