To adjust the sensitivity of a microphone according to a distance between the microphone and a person even without a dedicated sensor device.SOLUTION: A sensitivity adjustment device includes a superimposition unit that superimposes a measurement sound signal for measuring a distance to a person on a sound signal input from a sound source, a speaker that outputs a sound based on the signal superimposed by the superimposition unit, a microphone, a separation unit that separates a reflection component of the measurement sound from the person from the sound signal obtained by sound collection through the microphone, a calculation unit that calculates a distance between the microphone and the person on the basis of the reflection component separated by the separation unit, and an adjustment unit that adjusts the sensitivity of the microphone according to the distance calculated by the calculation unit.SELECTED DRAWING: Figure 3

    【課題】専用のセンサ装置を備えずとも、マイクロフォンと人との距離に応じてマイクロフォンの感度を調整する。【解決手段】感度調整装置を、人との距離を測定するための測定用音の信号を、音源より入力される音の信号に重畳する重畳部と、重畳部にて重畳された信号による音を出力するスピーカと、マイクロフォンと、マイクロフォンによる収音によって得られる音の信号から、上記人からの測定用音の反射成分を分離する分離部と、分離部にて分離された反射成分に基づいてマイクロフォンと人との距離を算出する算出部と、算出部にて算出された距離に応じてマイクロフォンの感度を調整する調整部とを備える構成とする。【選択図】図3


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    Titel :

    SENSITIVITY ADJUSTMENT DEVICE, IN-VEHICLE SYSTEM, CAR HEADREST, AND SIGNAL PROCESSING DEVICE


    Weitere Titelangaben:

    感度調整装置、車載システム、車用ヘッドレスト及び信号処理装置


    Beteiligte:
    KOGORI HIROSHIGE (Autor:in) / AKACHI MASASHI (Autor:in) / ABE HIROKI (Autor:in) / KOGA MASASHI (Autor:in)

    Erscheinungsdatum :

    2019-05-16


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS , Lautsprecher, Mikrofone, Schallplatten-Tonabnehmer oder ähnliche akustische, elektromechanische Wandler / A47C Stühle , CHAIRS / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G01S RADIO DIRECTION-FINDING , Funkpeilung



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