To suppress deterioration of noise level estimation accuracy due to a temperature change of a speaker.SOLUTION: A sound producing device includes: a filter 251 for attenuating a specified block band corresponding to a peak frequency of an electromotive force signal to be output from a speaker 3; a noise level estimation section 253 for estimating a noise level of sound collected by the speaker 3 based on an electromotive force signal that has passed through the filter 251; a temperature estimation section 26 for estimating sound producing body temperature being the temperature of the speaker 3; and a band control section 254 for changing a specified block band of the filter 251 with the use of sound producing body temperature estimated by the temperature estimation section 26.SELECTED DRAWING: Figure 1

    【課題】スピーカの温度変化による騒音レベルの推定精度の低下を抑制する。【解決手段】スピーカ3から出力される起電力信号のピーク周波数に対応する特定の阻止帯域を減衰させるフィルタ251と、フィルタ251を通過した起電力信号に基づいてスピーカ3により収集された音の騒音レベルを推定する騒音レベル推定部253と、スピーカ3の温度である発音体温度を推定する温度推定部26と、温度推定部26により推定された発音体温度を用いてフィルタ251の特定の阻止帯域を変化させる帯域制御部254と、を備えた。【選択図】図1


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    Title :

    SOUND PRODUCING DEVICE


    Additional title:

    発音装置


    Contributors:

    Publication date :

    2021-07-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS , Lautsprecher, Mikrofone, Schallplatten-Tonabnehmer oder ähnliche akustische, elektromechanische Wandler / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein



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