JPS60193784U

JPS60193784U - Automotive sound field correction device

Info

Publication number: JPS60193784U
Application number: JP8055984U
Authority: JP
Inventors: 芳郎功力; 徳毛　昭夫; 好美　敏和; 加藤　慎治郎; 佐々木　義雄; 小鷹　誠; 猛佐藤
Original assignee: パイオニア株式会社
Priority date: 1984-05-31
Filing date: 1984-05-31
Publication date: 1985-12-23
Anticipated expiration: 1999-05-31
Also published as: JP2514144Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図Ａは車室内の前座席における音圧周波数特性、Ｂ
は後座席における音圧周波数特性、第２図は車載用音響
装置の再生系の一例を示す構成図、第３図は音場内にお
ける直接波と反射波との一例の様子を示す図、第４図は
聴取点での音圧の周波数特性を示す図、第５図は道路状
況および走行速度に応じた自動車の車内騒音のスペクト
ルを示す図、第６図は本考案の一実施例を示すブロック
図、第７図は第６図における第１の高域補正回路の一例
を示す回路図、第８Ａ図はスピーカのエネルギーレスポ
ンスの特性図、第８Ｂ図は第７図の回路の補正周波数特
性図、第９図は第６図における走行マスキング補正回路
による周波数特性図、第１０図は第６図における第２の
高域補正回路の一例の回路図、第１１図は各車種Ａ、　
Ｂ毎の原信号ａ、第１の高域補正回路の出力ｂ１第２の
高域補正回路の出力Ｃの周波数特性図、第１２図は乗員
増加による高域レベルの低下の状態を示す周波数特性図
、第１３図は第６図における乗員数対応補正回路１６Ｌ
、１６Ｒの一例の回路図、第１４図はフロントドアに取
り付けられた左右一対のスピーカと聴取点との位置関係
を示す図、第１５図は第６図における可変利得器２５Ｌ
、２５Ｒの一例を示す回路図、第１６図は第６図におけ
る前座席側の第１の高域補正回路および乗員数対応補正
回路を一体に構成した一例の回路図、第１７図は後座席
側の第１の高域補正回路および可変利得器を一体に構成
した一例の回路図、第１８図ないし第２０図は第６図に
おける表示手段の具体的構成を示す回路図、第２１図は
スピーカをリアパーセルトレイ上に配置した場合におけ
る鏡像効果の原理を示す図、第２２図はスピーカをリア
パーセルトレイ上に配置した場合の後座席における周波
数特性を示す図、第２３図は低域カットを行なわない場
合の車室内における定在波分布図、第２４図はその周波
数特性図、第２５図は後座席側のパワーアンプの周波数
特性を示す図、第２６図は低域カットを行なった場合の
車室内における定在波分布図、第２７図はその周波数特
性図、第２８図は後座席側Ａ、前座席側Ｂおよび低音用
Ｃの各パワーアンプの周波数特性を示す図、第２９図は
車室内におけるスピーカの取付位置を示す図である。主要部分の符号の説明、１０・・・・・・第１の高域補
正回路、１１・・・・・・走行マスキング補正回路、１
２・・・・・・前座席用スピーカの補正回路、１３・・
・・・・後座席用スピーカの補正回路、１５Ｌ、１５Ｒ
・・・・・・第２の高域補正回路、１６Ｌ、１６Ｒ・・
・・・・乗員数対応補正回路、１７Ｌ、１７Ｒ・・・・
・・ピーク・ディップ補正回路、２３Ｌ、２３Ｒ，２５
Ｌ、２５Ｒ・・・・・・可変利得器、３０・・・・・・
入力手段、３１・・・・・・表示手段。 ■−−−− １００　　　　　　７にＯ″（勅ｋ）１０Ｋ　　周ミ防罠（Ｈ，７１１　　　　　　　−　−−−− ８０　　　　　　　　　　　川［改叡（ｄＢ］Figure 1 A is the sound pressure frequency characteristic in the front seat of the vehicle interior, B
2 is a configuration diagram showing an example of a reproduction system of an in-vehicle audio device. FIG. 3 is a diagram showing an example of direct waves and reflected waves in a sound field. Figure 5 shows the frequency characteristics of sound pressure at the listening point, Figure 5 shows the spectrum of noise inside a car depending on road conditions and driving speed, and Figure 6 shows a block diagram showing an embodiment of the present invention. 7 is a circuit diagram showing an example of the first high-frequency correction circuit in FIG. 6, FIG. 8A is a characteristic diagram of the energy response of the speaker, and FIG. 8B is a correction frequency characteristic diagram of the circuit in FIG. 7. , FIG. 9 is a frequency characteristic diagram of the driving masking correction circuit in FIG. 6, FIG. 10 is a circuit diagram of an example of the second high frequency correction circuit in FIG. 6, and FIG. 11 is a diagram of each vehicle type A,
A frequency characteristic diagram of the original signal a for each B, the output b of the first high frequency correction circuit, the output C of the second high frequency correction circuit, and FIG. 12 is the frequency characteristic showing the state of decrease in the high frequency level due to the increase in the number of passengers. 13 is a correction circuit 16L corresponding to the number of passengers in FIG. 6.
, 16R is an example circuit diagram, FIG. 14 is a diagram showing the positional relationship between a pair of left and right speakers attached to the front door and a listening point, and FIG. 15 is a circuit diagram of an example of the variable gain device 25L in FIG. 6.
, 25R, FIG. 16 is a circuit diagram of an example in which the first high frequency correction circuit on the front seat side and the correction circuit corresponding to the number of passengers in FIG. 6 are integrated, and FIG. 17 is a circuit diagram showing an example of the rear seat side FIGS. 18 to 20 are circuit diagrams showing a specific configuration of the display means in FIG. 6, and FIG. Figure 22 is a diagram showing the principle of mirror image effect when speakers are placed on the rear parcel tray. Figure 22 is a diagram showing the frequency characteristics in the rear seat when speakers are placed on the rear parcel tray. Figure 23 is a low frequency cut. Fig. 24 is a diagram showing the standing wave distribution in the vehicle interior when no cutting is performed, Fig. 24 is a diagram showing its frequency characteristics, Fig. 25 is a diagram showing the frequency characteristics of the power amplifier on the rear seat side, and Fig. 26 is a diagram showing the frequency characteristics of the power amplifier on the rear seat side. Fig. 27 is a diagram showing the distribution of standing waves in the vehicle interior, Fig. 28 is a diagram showing the frequency characteristics of each power amplifier for rear seat side A, front seat side B, and bass C, Fig. 29 The figure is a diagram showing the mounting position of the speaker in the vehicle interior. Explanation of symbols of main parts, 10...First high frequency correction circuit, 11...Travel masking correction circuit, 1
2...Front seat speaker correction circuit, 13...
...Rear seat speaker correction circuit, 15L, 15R
...Second high frequency correction circuit, 16L, 16R...
... Correction circuit corresponding to the number of passengers, 17L, 17R ...
...Peak dip correction circuit, 23L, 23R, 25
L, 25R...Variable gain unit, 30...
Input means, 31...Display means. ■---- 100 7 to O'' (K) 10K Shumi prevention trap (H, 71 1 - ----- 80 River [Kai (dB)

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

（１）自動車の座席に対応して設置されたスピーカによ
る直接波とその反射波とが作る車室音場内　。における音響特性の補正をなす車載用音場補正装置であ
って、前記座席における着座状況を入力する入力手段と
、前記入力手段による入力情報に応じて各座席の着座状
況を表示する表示手段と、前記入力手段による入力情報
に応じて前記スピーカの出力特性を変えることによって
車室内音響特性を補正する補正手段とを備えたことを特
徴とする車載用音場補正装置。(1) Inside the vehicle interior sound field created by direct waves from speakers installed corresponding to the seats of the car and their reflected waves. An in-vehicle sound field correction device that corrects the acoustic characteristics of the vehicle, comprising an input means for inputting the seating situation of the seat, and a display means for displaying the seating situation of each seat according to information input by the input means. An in-vehicle sound field correction device comprising: a correction means for correcting a vehicle interior acoustic characteristic by changing an output characteristic of the speaker according to information input by the input means.

（２）前記入力手段は各座席に対応して設けられた複数
の操作手段からなり、手動にて着座状況が′入力される
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
車載用音場補正装置。(2) The in-vehicle device according to claim 1, wherein the input means comprises a plurality of operation means provided corresponding to each seat, and the seating situation is input manually. Sound field correction device.

（３）前記入力手段は各座席毎に設けられて乗員が着座
したことを検知する複数の検知手段からなり、前記複数
の検知手段により自動的に着座状況が入力されることを
特徴とする実用新案登録請求の範囲第１項記載の車載用
音場補正装置。(3) The input means includes a plurality of detection means provided for each seat to detect whether an occupant is seated, and the seating situation is automatically input by the plurality of detection means. An in-vehicle sound field correction device according to claim 1 of the patent registration claim.

（４）　　前記表示手段は、色相変化、点滅もしくは輝
度変化により表示を行なうことを特徴とする実用新案登
録請求の範囲第１項記載の車載用音場補正装置。(4) The vehicle-mounted sound field correction device according to claim 1, wherein the display means performs display by changing hue, blinking, or changing brightness.