JP2019068395A5 - Sound systems, sound processing methods, and programs - Google Patents

Sound systems, sound processing methods, and programs Download PDF

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JP2019068395A5
JP2019068395A5 JP2018081202A JP2018081202A JP2019068395A5 JP 2019068395 A5 JP2019068395 A5 JP 2019068395A5 JP 2018081202 A JP2018081202 A JP 2018081202A JP 2018081202 A JP2018081202 A JP 2018081202A JP 2019068395 A5 JP2019068395 A5 JP 2019068395A5
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sound
audio signal
emitted
ultrasonic speaker
pressure level
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オーディオ信号を取得する取得手段と、An acquisition method for acquiring an audio signal,
ラウドスピーカと超音波スピーカとを含む複数のスピーカを制御するための制御信号を、前記取得手段により取得された前記オーディオ信号に基づいて生成する生成手段と、A generation means for generating a control signal for controlling a plurality of speakers including a loudspeaker and an ultrasonic speaker based on the audio signal acquired by the acquisition means, and a generation means.
前記生成手段により生成された制御信号を前記複数のスピーカへ出力する出力手段と、を有する音響システム。An audio system including an output means for outputting a control signal generated by the generation means to the plurality of speakers. 前記オーディオ信号に基づいて前記ラウドスピーカから放出される音と前記オーディオ信号に基づいて前記超音波スピーカから放出される音との音圧レベルのバランスが、前記オーディオ信号の周波数特性に応じて異なる請求項１に記載の音響システム。Claims that the balance of sound pressure levels between the sound emitted from the loudspeaker based on the audio signal and the sound emitted from the ultrasonic speaker based on the audio signal differs depending on the frequency characteristics of the audio signal. Item 1. The acoustic system according to item 1. 前記オーディオ信号に基づいて前記ラウドスピーカから放出される第１周波数帯域の音の音圧レベルは、前記オーディオ信号に基づいて前記超音波スピーカから放出される前記第１周波数帯域の音の音圧レベルより高く、The sound pressure level of the sound in the first frequency band emitted from the loudspeaker based on the audio signal is the sound pressure level of the sound in the first frequency band emitted from the ultrasonic speaker based on the audio signal. Higher,
前記オーディオ信号に基づいて前記ラウドスピーカから放出される前記第１周波数帯域より高い第２周波数帯域の音の音圧レベルは、前記オーディオ信号に基づいて前記超音波スピーカから放出される前記第２周波数帯域の音の音圧レベルより低い請求項１又は請求項２に記載の音響システム。The sound pressure level of the sound in the second frequency band higher than the first frequency band emitted from the loudspeaker based on the audio signal is the second frequency emitted from the ultrasonic speaker based on the audio signal. The acoustic system according to claim 1 or 2, which is lower than the sound pressure level of the sound in the band. 前記生成手段は、前記オーディオ信号の周波数特性と前記オーディオ信号に関するサラウンドパンパラメータとに応じた音圧レベルで前記ラウドスピーカと前記超音波スピーカからそれぞれ音が放出されるように、前記制御信号を生成する請求項１から請求項３の何れか１項に記載の音響システム。The generation means generates the control signal so that sound is emitted from the loudspeaker and the ultrasonic speaker at a sound pressure level corresponding to the frequency characteristic of the audio signal and the surround pan parameter related to the audio signal. The acoustic system according to any one of claims 1 to 3. 前記複数のスピーカが設置された空間における音の大きさを検出する検出手段を有し、It has a detecting means for detecting the loudness of the space in which the plurality of speakers are installed.
前記生成手段は、前記検出手段により検出された音の大きさに応じた音圧レベルで前記超音波スピーカから音が放出されるように、前記制御信号を生成する請求項１から請求項４の何れか１項に記載の音響システム。The first to fourth aspects of the generation means generate the control signal so that the sound is emitted from the ultrasonic speaker at a sound pressure level corresponding to the loudness of the sound detected by the detection means. The acoustic system according to any one item. 前記複数のスピーカが設置された空間のサイズと形状との少なくとも何れかを示す情報を取得する情報取得手段を有し、It has an information acquisition means for acquiring information indicating at least one of the size and shape of the space in which the plurality of speakers are installed.
前記生成手段は、前記情報取得手段により取得された情報に応じた音圧レベルで前記超音波スピーカから音が放出されるように、前記制御信号を生成する請求項１から請求項５の何れか１項に記載の音響システム。Any of claims 1 to 5, wherein the generation means generates the control signal so that sound is emitted from the ultrasonic speaker at a sound pressure level corresponding to the information acquired by the information acquisition means. The acoustic system according to item 1. 前記複数のスピーカは、複数のラウドスピーカと、超音波スピーカと、ウーファとを含む請求項１から請求項６の何れか１項に記載の音響システム。The acoustic system according to any one of claims 1 to 6, wherein the plurality of speakers include a plurality of loudspeakers, an ultrasonic speaker, and a woofer. 前記超音波スピーカは、超音波を発射する複数の超音波トランスデューサを駆動させることで、特定の方向に指向性を有する音を放出する請求項１から請求項７の何れか１項に記載の音響システム。The acoustic according to any one of claims 1 to 7, wherein the ultrasonic speaker emits a sound having directivity in a specific direction by driving a plurality of ultrasonic transducers that emit ultrasonic waves. system. オーディオ信号を取得する取得工程と、The acquisition process to acquire the audio signal and
ラウドスピーカと超音波スピーカとを含む複数のスピーカを制御するための制御信号を、前記取得工程において取得された前記オーディオ信号に基づいて生成する生成工程と、A generation step of generating a control signal for controlling a plurality of speakers including a loudspeaker and an ultrasonic speaker based on the audio signal acquired in the acquisition step.
前記生成工程において生成された制御信号を前記複数のスピーカへ出力する出力工程と、を有する音響処理方法。An acoustic processing method comprising an output step of outputting a control signal generated in the generation step to the plurality of speakers. 前記オーディオ信号に基づいて前記ラウドスピーカから放出される音と前記オーディオ信号に基づいて前記超音波スピーカから放出される音との音圧レベルのバランスが、前記オーディオ信号の周波数特性に応じて異なる請求項９に記載の音響処理方法。Claims that the balance of sound pressure levels between the sound emitted from the loudspeaker based on the audio signal and the sound emitted from the ultrasonic speaker based on the audio signal differs depending on the frequency characteristics of the audio signal. Item 9. The sound processing method according to Item 9. 前記オーディオ信号に基づいて前記ラウドスピーカから放出される第１周波数帯域の音の音圧レベルは、前記オーディオ信号に基づいて前記超音波スピーカから放出される前記第１周波数帯域の音の音圧レベルより高く、The sound pressure level of the sound in the first frequency band emitted from the loudspeaker based on the audio signal is the sound pressure level of the sound in the first frequency band emitted from the ultrasonic speaker based on the audio signal. Higher,
前記オーディオ信号に基づいて前記ラウドスピーカから放出される前記第１周波数帯域より高い第２周波数帯域の音の音圧レベルは、前記オーディオ信号に基づいて前記超音波スピーカから放出される前記第２周波数帯域の音の音圧レベルより低い請求項９又は請求項１０に記載の音響処理方法。The sound pressure level of the sound in the second frequency band higher than the first frequency band emitted from the loudspeaker based on the audio signal is the second frequency emitted from the ultrasonic speaker based on the audio signal. The acoustic processing method according to claim 9 or 10, which is lower than the sound pressure level of the sound in the band. コンピュータを、請求項１から請求項８の何れか１項に記載の音響システムとして機能させるためのプログラム。A program for causing a computer to function as the acoustic system according to any one of claims 1 to 8.
JP2018081202A 2017-10-03 2018-04-20 Acoustic systems, acoustic processing methods, and programs Active JP7095863B2 (en)

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PCT/JP2018/035366 WO2019069743A1 (en) 2017-10-03 2018-09-25 Audio controller, ultrasonic speaker, and audio system

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