JPS58198913A - Acoustic reproducing device - Google Patents
Acoustic reproducing deviceInfo
- Publication number
- JPS58198913A JPS58198913A JP8340582A JP8340582A JPS58198913A JP S58198913 A JPS58198913 A JP S58198913A JP 8340582 A JP8340582 A JP 8340582A JP 8340582 A JP8340582 A JP 8340582A JP S58198913 A JPS58198913 A JP S58198913A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- noise
- band
- output
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000009131 signaling function Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 230000035900 sweating Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/32—Automatic control in amplifiers having semiconductor devices the control being dependent upon ambient noise level or sound level
Landscapes
- Control Of Amplification And Gain Control (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は自動車の車室内等の各種騒音下での音楽、音声
等の音響信号を再生する場合に好適な音響再生装置に関
し、特に騒音で再生された音響信号がマスクされる現象
を防ぐだめに音響信号の再生音の音搦を１−けることに
より明瞭度を保つことに４Ｊ Ｌで有効な踊響再生装置
を提供することを目的とするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sound reproducing device suitable for reproducing sound signals such as music and voices under various noise conditions such as inside the cabin of an automobile, and in particular, the present invention relates to a sound reproducing device suitable for reproducing sound signals such as music and voices under various noise conditions such as inside the cabin of an automobile. It is an object of the present invention to provide a dance and sound reproducing device which is effective in 4JL in maintaining clarity by lowering the pitch of the reproduced sound of an acoustic signal by 1-0 in order to prevent such phenomenon.
一般に、自動車の車室内、あるいは各種騒音下て汗楽、
音声等の音響信号を再生する際に、騒音で再生さねた音
響信号をマスクする現象があり、このマスキング現象の
ために再生音の明瞭度を低下させてしまうという問題が
あった。そのため、従来から聴者が再生音の音覇を上げ
るようにして明瞭度を保ったり、父、騒音を検出して再
生音の音址を自動的に増加する方法が取られていた。し
かし、かかる従来の方法では、スピーカを駆動する′市
力増Ｉ＋］器の最大出力電力の限界があり、壕だ騒音検
出のマイクが目的とする信号に感応して誤動作を起す危
険があった。Generally, it is used for sweating in the interior of a car or under various noises.
When reproducing an acoustic signal such as a voice, there is a phenomenon in which the reproduced acoustic signal is masked by noise, and this masking phenomenon causes a problem in that the clarity of the reproduced sound is reduced. For this reason, conventional methods have been used in which the listener increases the tonal range of the reproduced sound to maintain clarity, or detects noise and automatically increases the tonal range of the reproduced sound. However, with this conventional method, there is a limit to the maximum output power of the device that drives the speaker, and there is a risk that the microphone for detecting underground noise may react to the intended signal and malfunction. .
本発明はこのような従来の欠点を解消するものであり、
２〜ａＫＨ２に共振帯域を有する帯域フ、イルタを含む
帯域増１］器に入力信号を通すと共にこの帯域増ＦＩＪ
器をマイクロホンにて検出した騒音信号を直流電圧に変
換した検出直流電圧にょ−）て利ｎｉ ？ｔｉｌｌ忙（
ｊし、・上記入力信号と上記帯域増巾器の出力Ｌ’ｉ
”ｊとを混合して取り出し、再生するように構成したも
のである。The present invention solves these conventional drawbacks,
2 to aKH2 having a resonance band, the input signal is passed through the band increaser 1 which includes a filter, and this band increase FIJ
Is the detected DC voltage obtained by converting the noise signal detected by the microphone into a DC voltage? till busy (
j, - the input signal and the output L'i of the band amplifier
``j'' is mixed and taken out and regenerated.
以下、本発明について実施例の図面と共に説明する。第
１図は本発明の一実施例を示しており、第１図において
、騒音検出用のマイクロホン１０で検出された音は、信
号と騒音とが同時に含まれている。このマイクロホン１
ｏの出力は前置増巾器１１を介し、騒音と信号とを分離
するだめの帯域増「ＩＪ器１２に加えられ、騒音のみが
取り出される。そして、この騒音は検波器１３で直流電
圧に変換され、帯域騒音に対しその明瞭度感を対応させ
るだめのウェイティング回路１４を介して２ＫＨ２から
３ＫＨ２に帯域を持つ帯域フィルタを含む帯域増１］器
１７に供給される。一方、テープレコーダ等の音響再生
機器１６の出力は増巾器１６で増ｒＩＪさｔｌて２つに
分岐され、その一方は直接加算器１８へ、他方は上記帯
域増巾器１７へ入力さねて利得制御され上記加算器１８
へと入力される。The present invention will be described below with reference to drawings of embodiments. FIG. 1 shows an embodiment of the present invention, and in FIG. 1, the sound detected by the noise detection microphone 10 contains both a signal and a noise. This microphone 1
The output of o is applied via a pre-amplifier 11 to an IJ unit 12 for separating noise and signals, and only the noise is extracted.Then, this noise is converted into a DC voltage by a detector 13. The signal is converted and supplied to a band increaser 17 including a band filter having a band from 2KH2 to 3KH2 via a weighting circuit 14 for adjusting the sense of clarity to the band noise. The output of the sound reproduction device 16 is amplified by the amplifier 16 and branched into two parts, one of which is directly input to the adder 18, and the other is input to the above-mentioned band amplifier 17, where the gain is controlled and the above-mentioned addition is performed. vessel 18
is input to.
そして、加算器１８の出力はスピーカの駆動を行なう電
力増１ｔＪ器１９を介してスピーカ２０へ供給され、ス
ピーカ２０を駆動して、音を発生する。The output of the adder 18 is then supplied to a speaker 20 via a power intensifier 19 for driving the speaker, which drives the speaker 20 to generate sound.
この様な回路系において、以下に考察する。人間の聴覚
上、最も感度の高い周波数は２ＫＨ２〜３′に１（Ｚに
あり、一般にはラウドネス曲線に示されている。また、
マスキング現象を考えた場合、低域成分のマスカー（騒
き）は高域まで広く影響を与える事が知られている。さ
らに、通常の音楽成分（テープ、レコード）等は、極低
汗の６０Ｈ２以下ではカッティング時あるいはダビング
時の問題として多くその成分を含まず、さらに高域成分
は楽器の成分としてあまり含まれない。この様な」二記
３点から音量全体としてはあまり増加せずとも明瞭度を
向−卜させる事ができる。さらにスピーカより発生した
信号は、マイクに検出３れても帯域フィルタを５ｏＨ２
以下に設定しておけば、問題はない。すなわち、騒音検
出帯域の信号レベルは増加もしない。ここで、ウェイテ
ィング回路１４は騒音のスペクトラムに対して各種を想
定した場合、信すの２〜ａＫＨ２の帯域増ｌＪ器の利得
を適当に聴者が設定する・だめのものである。たとえば
、−例として、自動車の騒音等では騒音の増加に対して
１：０．２程度の増加で明瞭度が一定になる１Ｊ（が実
験的に確認されている。Such a circuit system will be discussed below. The most sensitive frequency for human hearing is 2KH2 to 3' (Z), which is generally shown in the loudness curve.
When considering the masking phenomenon, it is known that the masker (noise) of the low frequency component has a wide influence on the high frequency range. Furthermore, normal music components (tapes, records), etc., do not contain many of these components at ultra-low sweat levels of 60H2 or below due to problems during cutting or dubbing, and furthermore, high-frequency components are not often included as components of musical instruments. From these points, the clarity can be improved without increasing the overall volume much. Furthermore, even if the signal generated from the speaker is detected by the microphone, it is passed through a bandpass filter of 5oH2.
If you set the following, there will be no problem. That is, the signal level in the noise detection band does not increase either. Here, the weighting circuit 14 is such that the listener can appropriately set the gain of the band increaser from 2 to aKH2, assuming various noise spectra. For example, it has been experimentally confirmed that in the case of car noise, etc., the intelligibility becomes constant with an increase of about 1:0.2 relative to the increase in noise (1J).
第２図は本発明の置体的な実施例を示しており、第２図
において、１０は検出用マイクロホンであり、ここで、
検出された騒音は前置増［ｌ］器１１゜狭帯域増Ｉｌｌ
器１２を介して、検波器１３により直流電圧を得ている
。そして、この直流電圧はウェイティング回路１４を構
成するスイッチＳＷにて抵抗Ｒと抵抗Ｒ２、Ｒ３、Ｒ４
によって、騒音に対応する出力直流電圧の比を変え、帯
域増巾器１７を構成する電圧利得制御器５へと接続され
て、騒）”？に対応した利得を制御する。ここで、オー
ディオ信りは入力端子８に接続されており、一方は抵
４抗Ｒ１□ を介して加算器１８を構成する増巾器Ｑ
４へ入力されて抵抗Ｒ１□、Ｒ１９の比Ｒ１９／Ｒ１□
の利イ！Ｉで増１１Ｊされる。他方は増巾器Ｑ１〜Ｑ３
と抵抗Ｒ−ＲおよびコンデンサＣ１，Ｃ２から構成さ１
２ １６
ねる帯域フフルタを介して上記電圧利得増巾器６へと接
続さｔｌ、抵抗Ｒ１８を介して加算器１８を構成する増
巾器Ｑ４へと接続される。このようにして、２ＫＨ２〜
３ＫＨ２の帯域の利得を制御し、原（、ｊ弓と加算され
、電力増１１」器１９によりスピーカ２０から音を発す
る。FIG. 2 shows a stationary embodiment of the present invention, and in FIG. 2, 10 is a detection microphone, where:
The detected noise is transmitted through the pre-intensifier 11° narrowband intensifier Ill.
A DC voltage is obtained through a detector 12 and a detector 13 . Then, this DC voltage is applied to the resistor R and the resistors R2, R3, and R4 by the switch SW constituting the weighting circuit 14.
is connected to the voltage gain controller 5 constituting the band amplifier 17 to control the gain corresponding to the noise. one is connected to input terminal 8, and one is connected to the resistor.
Amplifier Q that constitutes adder 18 via 4 resistors R1□
4 and the ratio of resistors R1□ and R19 R19/R1□
Benefits! I increases it by 11J. The other is the amplifier Q1~Q3
1 consisting of resistors R-R and capacitors C1 and C2.
The voltage gain amplifier 6 is connected to the voltage gain amplifier 6 via a 2 16 frequency band filter, and is connected to the amplifier Q4 constituting the adder 18 via a resistor R18. In this way, 2KH2~
The gain of the 3KH2 band is controlled, and the signal is added to the original (, j), and the sound is emitted from the speaker 20 by the power amplifier 19.
以上、詳述したように本発明によｔば、全体１゛警−を
増加させる事なしに、騒ざ一下での音楽、８声の明瞭度
を１ムＬ上させることができ、従−２て従来の様なざ一
全体を増加するシステムにおいて起る電蝕電圧より決定
される歪発生を除く小ができ、省エネルギーにも役ｑつ
ものである。特に自動中等の騒音下での音響再生をよぎ
なくされるシステムにおいては、中−のバッテリ の関
係やスピーカの大きさ等から見て有効なものである。As detailed above, according to the present invention, it is possible to increase the intelligibility of the eight voices of music under noisy conditions by 1 ml without increasing the overall sound quality by 1 ml. 2) It is possible to eliminate the distortion determined by the electrolytic erosion voltage which occurs in the conventional system which increases the overall chasm, thereby contributing to energy saving. This is especially effective in systems where sound must be reproduced in noisy environments such as when an automatic system is in use, due to the battery in the middle and the size of the speaker.
第１図は本発明の音響再生装置の一実施例を示すブロッ
ク図、第２図は同装置の要部具体回路図である。
１０１１ＩＩＩＩ・・・騒音検出マイクロホン、１１・
・・ａ参・前置増＋ｌ＋器、１２・・・・・・帯域増ｒ
ｌ＋器、１３・・・・・・検波器、１４・・・・・・ウ
ェイティングＮ路、１５・・・・・・Ｂｖ再生機器、１
６・・・・・・増巾器、１７・・・・・・帯域増巾器、
１８・０・・・加算器、１９・・φ・・・′Ｉｌｌ：力
増１１」器、２０・・・…スピーカ。FIG. 1 is a block diagram showing an embodiment of the sound reproduction device of the present invention, and FIG. 2 is a specific circuit diagram of the main part of the same device. 1011III...Noise detection microphone, 11.
... a reference, prefix increase + l + unit, 12...bandwidth increase r
l+ device, 13...detector, 14...waiting N path, 15...Bv reproducing device, 1
6... Amplifier, 17... Bandwidth amplifier,
18.0...Adder, 19...φ...'Ill: Power increaser 11'' device, 20...Speaker.
Claims (1)
圧に変換する手段と、この変換手段にて得られた検出直
流電圧によって利得制御され、かつ入力信号の一部が入
力される２〜ａＫＨ２付近に共振帯域をもつ帯域フィル
タを含む帯域増巾器と、上記入力信号と上記帯域増巾器
にて利得制御された出力信号とを混合する手段を備えて
なる音響再生装置。The noise signal from the noise detection microphone is converted into a direct current
a bandpass amplifier that includes a means for converting the voltage into a voltage, and a bandpass filter whose gain is controlled by the detected DC voltage obtained by the converting means and has a resonance band around 2 to aKH2 to which a part of the input signal is input. and a means for mixing the input signal and the output signal whose gain has been controlled by the band amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8340582A JPS58198913A (en) | 1982-05-17 | 1982-05-17 | Acoustic reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8340582A JPS58198913A (en) | 1982-05-17 | 1982-05-17 | Acoustic reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58198913A true JPS58198913A (en) | 1983-11-19 |
Family
ID=13801511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8340582A Pending JPS58198913A (en) | 1982-05-17 | 1982-05-17 | Acoustic reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58198913A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60107273U (en) * | 1983-12-27 | 1985-07-22 | 旭化成株式会社 | vertical frame |
-
1982
- 1982-05-17 JP JP8340582A patent/JPS58198913A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60107273U (en) * | 1983-12-27 | 1985-07-22 | 旭化成株式会社 | vertical frame |
| JPH022865Y2 (en) * | 1983-12-27 | 1990-01-23 |
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