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公开(公告)号：US10240812B2
公开(公告)日：2019-03-26
申请号：US15503791
申请日：2015-10-15
Inventor： Masaya Hanazono , Wakio Yamada
IPC: F24C15/20 , G10K11/178 , H04R1/02 , F24F13/24 , F24F7/06
Abstract: Provided are a signal processing device, a program, a range hood device, and a selection method for frequency bins in a signal processing device with which it is possible to reduce the load on computation processing for computing filter coefficients and provide an excellent muting effect even when there are a peak band and a notch band in transmission characteristics from a speaker to an error microphone. A parameter setter sets an update parameter μ such that a filter coefficient W is corrected, only for a first frequency bin that corresponds to a frequency band of a first noise and a second frequency bin that corresponds to a frequency band of a second noise.
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公开(公告)号：US11678119B2
公开(公告)日：2023-06-13
申请号：US17546407
申请日：2021-12-09
Inventor： Wakio Yamada , Daichi Toh
CPC classification number: H04R5/02 , F21S8/06 , F21V33/0056 , H04R1/025 , H04S1/00
Abstract: In a virtual sound image control system according to the present invention, a signal processor generates the acoustic signal and outputs the acoustic signal to the two-channel loudspeakers so as to create a virtual sound image to be perceived by a user as a stereophonic sound image. The two-channel loudspeakers are arranged such that a first listening area and a second listening area for the user are symmetric to each other with respect to a virtual plane including a virtual line segment connecting the two-channel loudspeakers together.
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Patent Agency Ranking
公开(公告)号：US10229666B2
公开(公告)日：2019-03-12
申请号：US15501345
申请日：2015-07-09
Inventor： Masaya Hanazono , Wakio Yamada
IPC: F24C15/20 , G10K11/178
Abstract: A signal processing device includes a coefficient updater configured to calculate a filter coefficient based on a reference signal, an error signal, and an update parameter to set the filter coefficient in a noise cancelling filter. A parameter adjuster adjusts the update parameter according to fluctuation of the reference signal produced from an output of a reference microphone.
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4.发明授权公开(公告)号：US11228839B2
公开(公告)日：2022-01-18
申请号：US16642830
申请日：2018-08-21
Inventor： Wakio Yamada , Daichi Toh
Abstract: In a virtual sound image control system according to the present invention, a signal processor generates an acoustic signal and outputs the acoustic signal to two-channel loudspeakers and so as to create a virtual sound image to be perceived by a user as a stereophonic sound image. The two-channel loudspeakers and have the same emission direction. The two-channel loudspeakers and are arranged in line in the emission direction.
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公开(公告)号：US09865244B2
公开(公告)日：2018-01-09
申请号：US15122273
申请日：2015-02-26
Inventor： Masaya Hanazono , Wakio Yamada
IPC: G10K11/178 , F24F13/24 , F24C15/20
CPC classification number: G10K11/1787 , F24C15/20 , F24C15/2021 , F24C15/2042 , F24F13/24 , F24F2013/247 , G10K11/178 , G10K11/1781 , G10K11/17854 , G10K11/17879 , G10K2210/105 , G10K2210/109 , G10K2210/112 , G10K2210/30231 , G10K2210/3025 , G10K2210/3026 , G10K2210/3028
Abstract: A silencer is to be used in combination with a range hood system to suppress noise made by a fan. In a silencing circuit, a disturbance detector detects mixing of disturbance sound to a correction signal and an error signal. When the disturbance detector detects the mixing of the disturbance sound, an updating stopper causes a coefficient updater to stop a processing of updating a filter coefficient of a silencer filter, relating to, as an object, at least a frequency band other than a frequency band of the noise.
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公开(公告)号：US11094310B2
公开(公告)日：2021-08-17
申请号：US16642839
申请日：2018-08-20
Inventor： Daichi Toh , Wakio Yamada
IPC: G10K11/178 , G10L21/0232 , G10K11/175
Abstract: According to the present disclosure, an additional sound generating unit detects, as a noise frequency, a frequency of a noise at a control point and generates an additional sound signal including signal components with additional frequencies different from the noise frequency. A canceling signal generating unit generates a canceling signal that cancels the noise at the control point. An emission unit outputs a control sound signal, generated by adding the additional sound signal to the canceling signal, to a loudspeaker and makes the loudspeaker emit the control sound.
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公开(公告)号：US10591169B2
公开(公告)日：2020-03-17
申请号：US15570877
申请日：2016-04-25
Inventor： Masaya Hanazono , Wakio Yamada
IPC: F24C15/20 , G10K11/178 , H04R1/02 , F24F7/06 , F24F130/40 , F24F13/24
Abstract: In a signal processing device, a signal processing method, a recording medium, and a rangehood apparatus, a filter coefficient is set in a sound cancelling filter, and the sound cancelling filter outputs a cancellation signal. A coefficient calculator calculates a first filter coefficient. An oscillation suppressor calculates a second filter coefficient by applying a window function to the first filter coefficient to set the second filter coefficient as the filter coefficient.
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