JPH0487898U - - Google Patents
Info
- Publication number
- JPH0487898U JPH0487898U JP11491890U JP11491890U JPH0487898U JP H0487898 U JPH0487898 U JP H0487898U JP 11491890 U JP11491890 U JP 11491890U JP 11491890 U JP11491890 U JP 11491890U JP H0487898 U JPH0487898 U JP H0487898U
- Authority
- JP
- Japan
- Prior art keywords
- microphone
- vehicle interior
- reduction device
- noise reduction
- speaker
- 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
- 230000003044 adaptive effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 12
- 238000009434 installation Methods 0.000 description 2
Landscapes
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Description
第１図は、本考案に係る電子式車室内騒音低減
装置の一実施例を示したブロツク図、第２図は、
本考案に係る電子式車室内騒音低減装置の空間伝
達関数を測定する装置を示したブロツク図、第３
図は、本考案に用いるマイクの設置位置の一実施
例を示した図、第４図は、本考案に用いるマイク
の設置位置の他の実施例を示した図、第５図は、
本考案に用いるマイクを車両ポストに設けたとき
の実施例を示した組立図、第６図は、自動車の車
室内で発生する種々の定在波モードを示した波形
図、第７図は、本考案による実施例で用いられる
複数のスピーカとマイクとの組合せを説明するた
めの平面略図、第８図は、２つのスピーカとマイ
クの組合せによる伝達関数の違いを説明するため
の図、第９図は、２つのスピーカとマイクの組合
せによる適応制御を行うときのブロツク図、第１
０図は、従来の車室内騒音の低減装置の一例を示
したブロツク図、第１１図は、適応フイルタの一
般的な構成を示したブロツク図、第１２図は、第
１０図の従来例を改良した従来の車室内騒音の低
減装置の一例を示したブロツク図、第１３図は、
第１０図と第１２図の従来例とを収束度において
比較するためのグラフ図、第１４図は、測定して
得た車室内空間伝達関数を有するフイルタを示し
たブロツク図、第１５図は、従来の電子式車室内
騒音低減装置のの空間伝達関数を測定する装置を
示すブロツク図、第１６図は、第１２図の車室内
騒音の低減装置を等価回路で示したブロツク図、
である。
図において、１は車両、２はコントローラ、１
０は車室、１１はエンジン、１３はマイク、１４
はスピーカ、２２は適応フイルタ、をそれぞれ示
す。図中、同一符号は同一又は相当部分を示す。
FIG. 1 is a block diagram showing an embodiment of an electronic vehicle interior noise reduction device according to the present invention, and FIG.
Block diagram 3 showing a device for measuring the spatial transfer function of the electronic vehicle interior noise reduction device according to the present invention.
The figure shows one example of the installation position of the microphone used in the present invention, FIG. 4 shows another example of the installation position of the microphone used in the invention, and FIG.
FIG. 6 is an assembly diagram showing an embodiment of the microphone used in the present invention installed on a vehicle post; FIG. 6 is a waveform diagram showing various standing wave modes generated in the interior of a vehicle; FIG. FIG. 8 is a schematic plan view for explaining the combination of a plurality of speakers and microphones used in the embodiment of the present invention; FIG. The figure shows a block diagram when performing adaptive control using a combination of two speakers and a microphone.
Fig. 0 is a block diagram showing an example of a conventional vehicle interior noise reduction device, Fig. 11 is a block diagram showing a general configuration of an adaptive filter, and Fig. 12 is a block diagram showing the conventional example of Fig. 10. Figure 13 is a block diagram showing an example of an improved conventional vehicle interior noise reduction device.
10 and 12 are graphs for comparing the conventional examples in terms of convergence; FIG. 14 is a block diagram showing a filter having the measured vehicle interior space transfer function; and FIG. , a block diagram showing a device for measuring the spatial transfer function of a conventional electronic vehicle interior noise reduction device; FIG. 16 is a block diagram showing an equivalent circuit of the vehicle interior noise reduction device of FIG. 12;
It is. In the figure, 1 is a vehicle, 2 is a controller, 1
0 is the passenger compartment, 11 is the engine, 13 is the microphone, 14
denotes a speaker, and 22 denotes an adaptive filter. In the figures, the same reference numerals indicate the same or corresponding parts.
Claims (1)
る手段と、スピーカと、対象乗員の頭上の車両天
井位置に取り付けられて全車室内騒音を検出する
マイクと、該基準信号から車体の振動系の該マイ
クまでの伝達関数の逆伝達関数を同定する適応フ
イルタ型コントローラとを備え、該コントローラ
が該マイクへの入力が最小になるように該スピー
カを制御することを特徴とした電子式車室内騒音
低減装置。 (2) 該コントローラが、ホワイトノイズを該ス
ピーカから出力させて該ホワイトノイズ源と該マ
イクの出力とから適応制御を行い該スピーカから
マイクまでの車室内空間伝達関数を測定すること
により構成される固定係数のフイルタを予め含ん
でいることを特徴とした請求項１に記載の電子式
車室内騒音低減装置。 (3) 該マイクが、車両天井位置でなく、所定の
車両ポストに取り付けられていることを特徴とし
た請求項１又は２に記載の電子式車室内騒音低減
装置。 (4) 該マイクが、車両天井位置でなく、所定の
シートベルトアンカーに取り付けられていること
を特徴とした請求項１又は２に記載の電子式車室
内騒音低減装置。 (5) 該マイクとスピーカが、車室内騒音の固有
の定在波の腹となる対向した車室位置に設置され
ることを特徴とした請求項１乃至４のいずれかに
記載の電子式車室内騒音低減装置。 (6) 該マイクとスピーカが、それぞれ複数設置
され、該コントローラが各マイク入力をサンプリ
ングして各マイクへの入力が最小になるように該
スピーカを制御することを特徴とした請求項５に
記載の電子式車室内騒音低減装置。[Scope of Claim for Utility Model Registration] (1) A means for generating a signal based on engine vibration, a speaker, and a microphone mounted on the ceiling of the vehicle above the head of the subject occupant to detect all vehicle interior noise; an adaptive filter type controller that identifies an inverse transfer function of a transfer function from a reference signal to the microphone in a vibration system of the vehicle body, and the controller controls the speaker so that input to the microphone is minimized. Features an electronic vehicle interior noise reduction device. (2) The controller outputs white noise from the speaker, performs adaptive control based on the white noise source and the output of the microphone, and measures a vehicle interior space transfer function from the speaker to the microphone. 2. The electronic vehicle interior noise reduction device according to claim 1, further comprising a fixed coefficient filter. (3) The electronic vehicle interior noise reduction device according to claim 1 or 2, wherein the microphone is attached to a predetermined vehicle post rather than at a vehicle ceiling position. (4) The electronic vehicle interior noise reduction device according to claim 1 or 2, wherein the microphone is attached to a predetermined seat belt anchor instead of at the vehicle ceiling. (5) The electronic vehicle according to any one of claims 1 to 4, characterized in that the microphone and the speaker are installed at opposing positions in the vehicle interior, where the antinode of a standing wave unique to vehicle interior noise exists. Indoor noise reduction device. (6) A plurality of microphones and a plurality of speakers are each installed, and the controller samples each microphone input and controls the speakers so that the input to each microphone is minimized. electronic vehicle interior noise reduction device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11491890U JPH0487898U (en) | 1990-09-28 | 1990-10-31 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10314890 | 1990-09-28 | ||
| JP11491890U JPH0487898U (en) | 1990-09-28 | 1990-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0487898U true JPH0487898U (en) | 1992-07-30 |
Family
ID=31948824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11491890U Pending JPH0487898U (en) | 1990-09-28 | 1990-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0487898U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7062049B1 (en) | 1999-03-09 | 2006-06-13 | Honda Giken Kogyo Kabushiki Kaisha | Active noise control system |
-
1990
- 1990-10-31 JP JP11491890U patent/JPH0487898U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7062049B1 (en) | 1999-03-09 | 2006-06-13 | Honda Giken Kogyo Kabushiki Kaisha | Active noise control system |
| US7254240B2 (en) | 1999-03-09 | 2007-08-07 | Honda Giken Kogyo Kabushiki Kaisha | Active noise control system |
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