To make a sound image to be localized at a front of each seat by using a speaker installed in a vehicle without increasing an array speaker.SOLUTION: In a vehicle acoustic controller, a front speaker signal processing part 11 perform filter processing of left and right acoustic signals to be input into left and right front speakers 1 and 2 by using a front speaker filter coefficient. A rear speaker signal processing part 12 performs the filter processing of the left and right acoustic signals to be inputted into left and right rear speakers 3 and 4 by using a rear speaker filter coefficient. A filter coefficient storage part 14 stores the filter coefficient for suppressing a sound pressure difference between both ears specific for a middle and low range band frequencies or for emphasizing a frequency band of which the sound pressure difference between both ears in the middle and low range frequency bands is relatively small. A control part 13 sets the filter coefficient stored in the filter coefficient storage part 14 to the front speaker signal processing part 11 and the rear speaker signal processing part 12.SELECTED DRAWING: Figure 1

    【課題】アレイスピーカを増設することなく、車両に設置されているスピーカを使用して各座席前方に音像を定位させる。【解決手段】車両用音響制御装置は、フロントスピーカ信号処理部11は、左右フロントスピーカ1、2に入力される左右音響信号を、フロントスピーカ用フィルタ係数を用いてフィルタ処理する。リアスピーカ信号処理部12は、左右リアスピーカ3、4に入力される左右音響信号を、リアスピーカ用フィルタ係数を用いてフィルタ処理する。フィルタ係数記憶部14は、車両の全座席の両耳位置における音圧周波数特性のうち、中低域周波数特性の両耳間の音圧差を抑制するための、又は中低域周波数帯域における両耳間の音圧差が相対的に小さい周波数帯域を強調するためのフィルタ係数を記憶している。制御部13は、フィルタ係数記憶部14に記憶されているフィルタ係数を、フロントスピーカ信号処理部11及びリアスピーカ信号処理部12に設定する。【選択図】図1


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    Title :

    VEHICLE ACOUSTIC CONTROLLER AND FILTER DESIGN METHOD


    Additional title:

    車両用音響制御装置及びフィルタ設計方法


    Contributors:

    Publication date :

    2019-12-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H04S Stereophone Systeme , STEREOPHONIC SYSTEMS / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS , Lautsprecher, Mikrofone, Schallplatten-Tonabnehmer oder ähnliche akustische, elektromechanische Wandler



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