JPS6199900U - - Google Patents

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Publication number
JPS6199900U
JPS6199900U JP18359484U JP18359484U JPS6199900U JP S6199900 U JPS6199900 U JP S6199900U JP 18359484 U JP18359484 U JP 18359484U JP 18359484 U JP18359484 U JP 18359484U JP S6199900 U JPS6199900 U JP S6199900U
Authority
JP
Japan
Prior art keywords
harmonic
sound
rotation speed
composite signal
adjusting
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
Application number
JP18359484U
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP18359484U priority Critical patent/JPS6199900U/ja
Publication of JPS6199900U publication Critical patent/JPS6199900U/ja
Pending legal-status Critical Current

Links

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案のクレーム対応図、第２図ａ
はこの考案の一実施例を示す車両用騒音低減装置
のブロツク図、第２図ｂはこの車両用騒音低減装
置の処理フローを示す図、第３図は従来の車両用
騒音低減装置の概略構成図である。 １…騒音検出手段、３…回転数検出手段、５…
調波発生手段、７…調波成分調整手段、９…合成
手段、１１…合成信号調整手段、２１…点火コイ
ル、３５…周波数シンセサイザ部、３７…位相比
較検出器、３９…ローパスフイルタ、４１…電圧
制御発振器、４３…プログラマブルデイバイダ、
４５…カウンタ、４７…マイクロコンピユータ、
４９ａ，４９ｂ，…４９ｎ…プログラマブルアツ
テネータ、５１ａ，５１ｂ，…５１ｎ…プログラ
マブル位相調整器、５３…マイクロホン、５７…
ローパスフイルタ、５９…バンドパスフイルタ、
６７…加算回路、６９…位相調整回路、７１…レ
ベル調整回路、７５…スピーカ。 Figure 1 is a complaint correspondence diagram of this invention, Figure 2 a
is a block diagram of a vehicle noise reduction device showing an embodiment of this invention, FIG. 2b is a diagram showing the processing flow of this vehicle noise reduction device, and FIG. 3 is a schematic configuration of a conventional vehicle noise reduction device. It is a diagram. 1... Noise detection means, 3... Rotation speed detection means, 5...
Harmonic generating means, 7... Harmonic component adjusting means, 9... Synthesizing means, 11... Combined signal adjusting means, 21... Ignition coil, 35... Frequency synthesizer section, 37... Phase comparison detector, 39... Low pass filter, 41... Voltage controlled oscillator, 43...programmable divider,
45...Counter, 47...Microcomputer,
49a, 49b,...49n...Programmable attenuator, 51a, 51b,...51n...Programmable phase adjuster, 53...Microphone, 57...
Low pass filter, 59...Band pass filter,
67...Addition circuit, 69...Phase adjustment circuit, 71...Level adjustment circuit, 75...Speaker.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 車室内の音を検出する音検出手段と、車両のエ
ンジン回転数を検出する回転数検出手段と、前記
回転数検出手段で検出されたエンジン回転数を基
本波の周波数とした高調波信号を含む調波を出力
する調波発生手段と、前記音検出手段で検出した
音の各調波成分が最小になるように前記調波発生
手段から出力される対応する調波成分のレベルお
よび位相を調整する調波成分調整手段と、前記調
波成分調整手段でレベルおよび位相の調整された
各調波成分を合成する合成手段と、前記音検出手
段で検出した音が最小になるように前記合成手段
で合成された信号のレベルおよび位相を調整する
合成信号調整手段と、前記合成信号調整手段で調
整された合成信号を音波として出力する出力手段
、とを有することを特徴とする車両用騒音低減装
置。 A sound detection means for detecting the sound inside the vehicle, a rotation speed detection means for detecting the engine rotation speed of the vehicle, and a harmonic signal whose fundamental frequency is the engine rotation speed detected by the rotation speed detection means. A harmonic generating means for outputting harmonic waves, and adjusting the level and phase of the corresponding harmonic components output from the harmonic generating means so that each harmonic component of the sound detected by the sound detecting means is minimized. a harmonic component adjustment means for synthesizing each harmonic component whose level and phase have been adjusted by the harmonic component adjustment means; A noise reduction device for a vehicle, comprising a composite signal adjusting means for adjusting the level and phase of a signal synthesized by the composite signal adjusting means, and an output means for outputting the composite signal adjusted by the composite signal adjusting means as a sound wave. .
JP18359484U 1984-12-05 1984-12-05 Pending JPS6199900U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18359484U JPS6199900U (en) 1984-12-05 1984-12-05

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18359484U JPS6199900U (en) 1984-12-05 1984-12-05

Publications (1)

Publication Number Publication Date
JPS6199900U true JPS6199900U (en) 1986-06-26

Family

ID=30741087

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18359484U Pending JPS6199900U (en) 1984-12-05 1984-12-05

Country Status (1)

Country Link
JP (1) JPS6199900U (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6416098A (en) * 1987-07-09 1989-01-19 Toyota Motor Corp Controller for sound filled in vehicle
JPH02306844A (en) * 1989-05-22 1990-12-20 Isuzu Motors Ltd Device for reducing indoor noise
JPH02306845A (en) * 1989-05-22 1990-12-20 Isuzu Motors Ltd Device for reducing vehicle indoor noise
JPH03203491A (en) * 1989-12-29 1991-09-05 Nissan Motor Co Ltd Active type noise controller
JPH03204354A (en) * 1989-12-29 1991-09-05 Nissan Motor Co Ltd Active type noise control device
JPH06175669A (en) * 1992-12-04 1994-06-24 Fujitsu Ten Ltd Noise controller
JPH096368A (en) * 1995-06-20 1997-01-10 Nec Corp Muffling device for duct

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6416098A (en) * 1987-07-09 1989-01-19 Toyota Motor Corp Controller for sound filled in vehicle
JPH02306844A (en) * 1989-05-22 1990-12-20 Isuzu Motors Ltd Device for reducing indoor noise
JPH02306845A (en) * 1989-05-22 1990-12-20 Isuzu Motors Ltd Device for reducing vehicle indoor noise
JPH03203491A (en) * 1989-12-29 1991-09-05 Nissan Motor Co Ltd Active type noise controller
JPH03204354A (en) * 1989-12-29 1991-09-05 Nissan Motor Co Ltd Active type noise control device
JPH06175669A (en) * 1992-12-04 1994-06-24 Fujitsu Ten Ltd Noise controller
JPH096368A (en) * 1995-06-20 1997-01-10 Nec Corp Muffling device for duct

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