PROBLEM TO BE SOLVED: To provide an acoustic conversion device for active noise control capable of suppressing variations in the lowest resonance frequency to effectively suppress or remove noise.SOLUTION: With a volume Vof a closed space A2 being smaller than an equivalent compliance air volume Vof a speaker unit 2, the movement of a diaphragm, an edge, or a damper is suppressed, which can suppress temporal deterioration of the edge or damper, and variations in the lowest resonance frequency are suppressed to make the phase of emitted sound unlikely to be shifted from the opposite phase of noise, so that the noise can be suppressed or removed effectively.SELECTED DRAWING: Figure 1

    【課題】最低共振周波数の変動を抑制して騒音を効果的に抑制又は除去することができるアクティブノイズコントロール用音響変換装置を提供する。【解決手段】閉空間A2の容積VA2がスピーカユニット2の等価コンプライアンス空気容積Vasよりも小さいことで、振動板やエッジ、ダンパの動きが抑制され、エッジやダンパの経時的な劣化を抑制することができ、最低共振周波数の変動を抑制し、放射する音の位相を騒音の逆位相からずれにくくし、騒音を効果的に抑制又は除去することができる。【選択図】図1


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    Title :

    ACOUSTIC CONVERSION DEVICE FOR ACTIVE NOISE CONTROL


    Additional title:

    アクティブノイズコントロール用音響変換装置


    Contributors:

    Publication date :

    2018-04-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / 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



    ACOUSTIC CONVERSION DEVICE FOR ACTIVE NOISE CONTROL

    IIDA JUNICHI / TAKAHASHI AKIRA / OGITA TOMOKI et al. | European Patent Office | 2016

    Free access