JPS6289830U - - Google Patents
Info
- Publication number
- JPS6289830U JPS6289830U JP18036385U JP18036385U JPS6289830U JP S6289830 U JPS6289830 U JP S6289830U JP 18036385 U JP18036385 U JP 18036385U JP 18036385 U JP18036385 U JP 18036385U JP S6289830 U JPS6289830 U JP S6289830U
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- gain
- vehicle
- noise level
- audio device
- 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 description 2
- 230000005236 sound signal Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Control Of Amplification And Gain Control (AREA)
Description
第１図は、本考案の実施例を示すブロツク図、
第２図は、前方スピーカ及び後方スピーカの周波
数レスポンスを説明する為の図、第３図は、従来
例を示すブロツク図である。
主要部分の符号の説明、１……オーデイオ信号
源、２，１１，１２……ＶＣＡ、４……マイク、
５……ノイズレベル検出回路、９……前方スピー
カ群、１０……後方スピーカ群。
FIG. 1 is a block diagram showing an embodiment of the present invention;
FIG. 2 is a diagram for explaining the frequency responses of front speakers and rear speakers, and FIG. 3 is a block diagram showing a conventional example. Explanation of symbols of main parts, 1... Audio signal source, 2, 11, 12... VCA, 4... Microphone,
5... Noise level detection circuit, 9... Front speaker group, 10... Rear speaker group.
Claims (1)
ル信号を得るノイズレベル検出回路と、前記ノイ
ズレベル信号に対応した利得が各々設定されてオ
ーデイオ信号を増幅する第１及び第２アンプと、
車室前方に配置されて第１アンプにより駆動され
るスピーカ群と、車室後方に配置されて第２アン
プにより駆動されるスピーカ群とを備える車載音
響装置であつて、第１アンプの利得増加率は第２
アンプの利得増加率より常に小さいことを特徴と
する車載音響装置。 (2) 第１及び第２アンプの利得は騒音１０ｄＢ
Ａの増加に対してそれぞれ２±２ｄＢ及び４±２
ｄＢ増加することを特徴とする実用新案登録請求
の範囲第１項記載の車載音響装置。[Claims for Utility Model Registration] (1) A noise level detection circuit that obtains a noise level signal corresponding to the noise level inside a vehicle, and a first circuit that amplifies an audio signal by setting a gain corresponding to the noise level signal. and a second amplifier;
An in-vehicle audio device comprising a speaker group disposed at the front of the vehicle interior and driven by a first amplifier, and a speaker group disposed at the rear of the vehicle interior and driven by a second amplifier, the gain of the first amplifier being increased. rate is second
An in-vehicle audio device characterized in that the gain increase rate is always smaller than the gain increase rate of an amplifier. (2) The gain of the first and second amplifiers is 10 dB of noise.
2 ± 2 dB and 4 ± 2 for the increase in A, respectively.
The in-vehicle audio device according to claim 1, which is characterized in that the in-vehicle audio device increases by dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18036385U JPS6289830U (en) | 1985-11-21 | 1985-11-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18036385U JPS6289830U (en) | 1985-11-21 | 1985-11-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6289830U true JPS6289830U (en) | 1987-06-09 |
Family
ID=31124251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18036385U Pending JPS6289830U (en) | 1985-11-21 | 1985-11-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6289830U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5710115B2 (en) * | 1978-09-01 | 1982-02-24 | ||
| JPS60145714A (en) * | 1984-01-06 | 1985-08-01 | Nissan Motor Co Ltd | Acoustic device for vehicle |
-
1985
- 1985-11-21 JP JP18036385U patent/JPS6289830U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5710115B2 (en) * | 1978-09-01 | 1982-02-24 | ||
| JPS60145714A (en) * | 1984-01-06 | 1985-08-01 | Nissan Motor Co Ltd | Acoustic device for vehicle |
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