Virtual perception active noise control method based on sound velocity potential constraint in sleep cabin

Abstract

The invention discloses a sound velocity potential constraint-based virtual perception active noise control method in a sleep cabin, which comprises the following steps of: arranging a secondary sound source, an error microphone and a reference microphone on the sleep cabin, and connecting the secondary sound source, the error microphone and the reference microphone to a digital signal processor; arranging a plurality of virtual microphones as reference points around the head of the user in the sleep cabin; modeling a secondary sound path and a virtual secondary sound path; adjusting the filter; taking the position of each virtual microphone as a virtual point, placing the real microphone at the virtual point to collect noise signals in the sleep cabin, and collecting external environment noise by the reference microphone; the digital signal processor filters the reference signals collected by all the reference microphones at each moment by using a control filter to obtain a control signal for driving the secondary sound source; the real microphone is removed, and the secondary sound source generates sound waves to the area surrounded by the virtual point based on the control signal, thereby forming a virtual sound barrier in the space surrounded by the virtual point.

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