JPH07170587A - Headphone and microphone with function eliminating noise - Google Patents
Headphone and microphone with function eliminating noiseInfo
- Publication number
- JPH07170587A JPH07170587A JP5349544A JP34954493A JPH07170587A JP H07170587 A JPH07170587 A JP H07170587A JP 5349544 A JP5349544 A JP 5349544A JP 34954493 A JP34954493 A JP 34954493A JP H07170587 A JPH07170587 A JP H07170587A
- Authority
- JP
- Japan
- Prior art keywords
- sound
- microphone
- headphone
- speaker
- phase
- 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.)
- Pending
Links
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Reverberation, Karaoke And Other Acoustics (AREA)
Abstract
Description
【０００１】［産業上の利用分野］この発明は、スピー
カー付近の音を検出し、その音とほぼ同出力・同位相・
逆振幅の音を発生することで消音する、消音機能付きヘ
ッドホンとマイクに関するものである。[Field of Industrial Application] The present invention detects a sound in the vicinity of a speaker and outputs a sound having substantially the same output, the same phase,
The present invention relates to a headphone and a microphone with a sound deadening function, which mute sound by generating a sound with a reverse amplitude.
【０００２】［従来の技術］従来、騒音は耳栓で耳を塞
ぐか防音室に入るしかなく、人に迷惑をかけないように
大声を出すには防音室に入るしかなかった。しかし、防
音室は大がりで高価なものであり、耳栓は消音と言うよ
り音声減衰であり大きな音には無力であり、長時間装着
すると耳が痛くなっていた。2. Description of the Related Art Conventionally, noise must be blocked by earplugs or enter a soundproof room, and the only way to make a loud noise is to enter the soundproof room so as not to bother people. However, the soundproof room is large and expensive, and the earplugs are not sound-deadening but sound-attenuating and are ineffective for loud sounds, and the ears hurt when worn for a long time.
【０００３】［発明が解決しようとする課題］この発明
は、手軽に騒音を防いだり、他人に迷惑をかけることな
く大声を出せるようにしようとするものである。[Problems to be Solved by the Invention] The present invention is intended to easily prevent noise and to make a loud voice without inconvenience others.
【０００４】［課題を解決するための手段］いまこれを
図面について説明すると図１のような装置であり、音声
入力用のマイクロホン（１）からの信号を増幅器（２）
で増幅し、逆振幅の音として出力スピーカー（３）から
出力する装置である。[Means for Solving the Problem] Referring now to the drawings, a device as shown in FIG. 1 is provided, in which a signal from a microphone (1) for voice input is amplified by an amplifier (2).
It is a device that is amplified by and is output from the output speaker (3) as a sound with an opposite amplitude.
【０００５】［作用］スピーカー付近の音を音声入力用
のマイクロホンが検出し、その音とほぼ同出力・同位相
・逆振幅の音に増幅器が変換し、それをスピーカーが出
力することで音を相殺し消音する。また、信号が複数の
場合は加算増幅を行なう。[Function] A sound input microphone detects a sound in the vicinity of the speaker, and the amplifier converts the sound into a sound having substantially the same output, the same phase, and a reverse amplitude, and the speaker outputs the sound. Cancel and mute. When there are a plurality of signals, addition amplification is performed.
【０００６】［実施例］まず、スピーカーの近くで検出
した音声信号をトランジスタで増幅しスピーカーから発
信してみた。すると増幅率を調整することで音声をかな
り小さくできた。また、これをヘッドホンに応用すると
耳に入る音を小さくできた。単純に逆振幅の音波を発生
するだけでかなりよく相殺できたのは人の耳に聞こえる
音の半波長が１ｃｍ以上であり、普通の生活で聞く主な
音の半波長は短い方でも１０ｃｍぐらいあるためスピー
カーと検音器の間隔による位相差が無視できたためと考
えられる。したがって、さらに消音の機能を高めるため
には、ヘッドホンならばヘッドホンの内側に伝わる音と
検音器で検出する音との間の各周波数による減衰の度合
いをフィルターとして用いたり、検音器にヘッドホン同
様のカバーをしたり、検音器をヘッドホンの内側に付け
ればよい。また、位相をより完全に合わせるために位相
を距離に応じて少し遅らせたりすればよい。また、図３
のように複数の検音器を取り付けそれを加算して増幅す
るとなおよい。消音マイクは図４のようにスピーカーの
中心のちよっと上に検音器を取り付け、位相を少し遅ら
せればよく消音できる。原理的にはヘッドホンの場合は
音の反射でありマイクの場合は散乱した音波を一所に集
めるものであるためそのエネルギー（特にマイクにおい
て）は（本来、スピーカーは前方に出す音のほうが後方
に出す音よりずっと大きくなるようになっているが）吸
収材で吸収しなければならない。また、本発明は音波に
逆振幅の音波を重ねることで疎密を相殺して消音すこと
を特徴としている消音装置についてであり、草刈り機の
ようにうるさいエンジン音を響かせる機械の簡単な消音
器としても利用できる。また、位相の差を補正出来れば
検音器とスピーカーは近くでなくてもよく、かつ、同じ
向きを向いて入る必要もない。また、聞こえない周波数
の風のような音の妨害を避けるように検音器は設置しな
ければならない。また、この装置は検音器の正負の導線
を入れ替えるだけで外部の音を増幅することも出来るよ
うになる。信号の振幅を反転するのは簡単である。ま
た、信号を反転しなくても消音機能のための増幅を大き
くすれば自然に集音機能となるため、集音機能・消音機
能付きヘッドホンを簡単に作れる。また、耳栓のような
形の消音器は音の位相差が小さいので効果がよい。ボタ
ン電池で動くようにするとよい。[Example] First, an audio signal detected near a speaker was amplified by a transistor and transmitted from the speaker. Then, the sound could be made quite small by adjusting the amplification factor. In addition, when this was applied to headphones, the sound heard in the ear was reduced. It was possible to cancel fairly well by simply generating sound waves of opposite amplitude because the half-wavelength of the sound heard by the human ear is 1 cm or more, and the half-wavelength of the main sound heard in normal life is about 10 cm even for the shorter one. This is probably because the phase difference due to the distance between the speaker and the sound detector could be ignored. Therefore, in order to further enhance the muffling function, if headphones are used, the degree of attenuation due to each frequency between the sound transmitted inside the headphones and the sound detected by the sound detector is used as a filter, or the headphone is used as the sound detector. A similar cover may be used, or a sound detector may be attached inside the headphones. Further, the phase may be slightly delayed according to the distance in order to match the phase more completely. Also, FIG.
It is even better to attach multiple sound detectors and add them for amplification. As shown in Fig. 4, the sound deadening microphone can be muted well by attaching a sound detector slightly above the center of the speaker and slightly delaying the phase. In principle, in the case of headphones, sound is reflected and in the case of microphones, the scattered sound waves are collected in one place, so its energy (especially in a microphone) is It is supposed to be much louder than the sound it makes) but must be absorbed by an absorber. Further, the present invention relates to a silencer characterized by canceling out densities by superimposing a sound wave of opposite amplitude on the sound wave, and also as a simple silencer for a machine that resonates a noisy engine sound like a mower. Available. Also, if the phase difference can be corrected, the sound detector and the speaker do not have to be close to each other, and it is not necessary to face in the same direction. In addition, sound detectors must be installed to avoid interference with inaudible frequencies such as wind. In addition, this device can also amplify external sound simply by replacing the positive and negative conducting wires of the sound detector. It is easy to invert the amplitude of a signal. Also, even if the signal is not inverted, if the amplification for the muffling function is increased, it will naturally become the sound collecting function, so it is easy to make headphones with the sound collecting and muffling functions. Further, a muffler having a shape like an earplug is effective because the phase difference of the sound is small. It is recommended to use a button battery.
【０００７】［発明の効果］簡単に消音できるようにな
るため、カラオケの練習が自分の部屋で出来るようにな
る（音楽と自分の声はヘッドホンで聞けばよい）。ま
た、耳栓をしなくても音楽を聞くヘッドホンで簡単に騒
音を防げるようになる。[Advantages of the Invention] Since the sound can be muted easily, karaoke can be practiced in one's room (music and one's own voice can be heard through headphones). Also, you can easily prevent noise with headphones that listen to music without wearing earplugs.
【図１】 本発明の基本構成を示す回路図である。FIG. 1 is a circuit diagram showing a basic configuration of the present invention.
【図２】 本発明のヘッドホンへの利用の一例である。FIG. 2 is an example of application of the present invention to headphones.
【図３】 本発明のヘッドホンへの利用の一例である。FIG. 3 is an example of application of the present invention to headphones.
【図４】 本発明のマイクへの利用の一例である。FIG. 4 is an example of application of the present invention to a microphone.
１、音声入力用のマイクロホン ２、増幅器 ３、
出力スピーカー1. Microphone for voice input 2. Amplifier 3.
Output speaker
Claims (1)
号を増幅器（２）で増幅し、逆振幅の音として出力スピ
ーカー（３）から出力し、波を重ねることで音波の疎密
を相殺して消音することを特徴とする消音装置。1. A signal from a microphone (1) for voice input is amplified by an amplifier (2) and output as a sound of reverse amplitude from an output speaker (3), and the waves are overlapped to cancel the density of sound waves. A muffling device that is characterized in that it muffles sound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5349544A JPH07170587A (en) | 1993-12-15 | 1993-12-15 | Headphone and microphone with function eliminating noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5349544A JPH07170587A (en) | 1993-12-15 | 1993-12-15 | Headphone and microphone with function eliminating noise |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07170587A true JPH07170587A (en) | 1995-07-04 |
Family
ID=18404442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5349544A Pending JPH07170587A (en) | 1993-12-15 | 1993-12-15 | Headphone and microphone with function eliminating noise |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07170587A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006053504A (en) * | 2004-08-11 | 2006-02-23 | Tatsuko Kato | Sound eliminating device for vocal exercise |
| JP2009535655A (en) * | 2006-01-26 | 2009-10-01 | ウォルフソン・マイクロエレクトロニクス・ピーエルシー | Ambient noise reduction device |
-
1993
- 1993-12-15 JP JP5349544A patent/JPH07170587A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006053504A (en) * | 2004-08-11 | 2006-02-23 | Tatsuko Kato | Sound eliminating device for vocal exercise |
| JP2009535655A (en) * | 2006-01-26 | 2009-10-01 | ウォルフソン・マイクロエレクトロニクス・ピーエルシー | Ambient noise reduction device |
| US8472636B2 (en) | 2006-01-26 | 2013-06-25 | Wolfson Microelectronics Plc | Ambient noise reduction arrangements |
| US9786264B2 (en) | 2006-01-26 | 2017-10-10 | Cirrus Logic, Inc. | Ambient noise reduction arrangements |
| US10460718B2 (en) | 2006-01-26 | 2019-10-29 | Cirrus Logic, Inc. | Ambient noise reduction arrangements |
| US11127390B2 (en) | 2006-01-26 | 2021-09-21 | Cirrus Logic, Inc. | Ambient noise reduction arrangements |
| US11620975B2 (en) | 2006-01-26 | 2023-04-04 | Cirrus Logic, Inc. | Ambient noise reduction arrangements |
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