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1.发明公开公开(公告)号：US20240334152A1
公开(公告)日：2024-10-03
申请号：US18698642
申请日：2022-10-04
CPC分类号： H04S7/307 , H04R1/403 , H04R3/14 , H04S7/301 , H04S7/303 , H04R2201/403 , H04S2420/07
摘要： The invention relates to a system for generating sound waves for at least two separate zones of a single space. The system includes, for each zone of said space: at least one array of high-frequency loudspeakers forming a directional sound wave; and at least one low-frequency loudspeaker. The system also comprises means for audio processing of the signals transmitted to the loudspeakers, which means control at least one loudspeaker to generate destructive sound waves in at least one zone of said space and to obtain distinct sound contents in said at least two distinct zones of said space. To do this, the audio-processing means control each low-frequency loudspeaker individually and each array of high-frequency loudspeaker mutually in order to generate the destructive sound waves.
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2.发明授权公开(公告)号：US09959883B2
公开(公告)日：2018-05-01
申请号：US15287355
申请日：2016-10-06
CPC分类号： G10L21/0232 , H04R3/00 , H04R3/04 , H04R29/004 , H04S1/005
摘要： The method and system for measuring low-noise acoustical impulse responses at high sampling rates of the present invention utilizes two exponential sine sweeps (ESSs) to measure the impulse responses. The first ESS is a quick sweep up to the Nyquist frequency to provide an estimate of the system response and sample the ambient noise. This measurement is used to algorithmically determine an appropriate pass-band of the system. A second, slower sweep through the pass-band alone is then executed and a corresponding band-pass filter is applied to the resulting output signal to suppress noise. The result is a measured impulse response with an improved signal-to-noise ratio and a much-reduced pre-response.
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