Patent ID: 11882397
Assignee: WEIFANG GOERTEK MICROELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 2:
3. The noise reduction method of claim 2, wherein when the two or more microphones comprises two microphones, and wherein the determining comprises:
computing, according to the first sound signal and the second sound signal collected by a first microphone, a first delay time corresponding to a peak point of corr(τ)=∫−∞+∞(x*(t)x1(t+τ)), wherein the first delay time is a delay time from a time when the voice signal arrives at the first microphone to a time when the voice signal arrives at the bone conduction microphone, x*(t) is a conjugate of the first sound signal, and x1(t) is the second sound signal collected by the first microphone; and
computing, according to the second sound signal collected by a second microphone and the first sound signal, a second delay time corresponding to a peak point of corr(τ)=∫−∞+∞(x*(t)x2(t+τ)), wherein the second delay time is a delay time from a time when the voice signal arrives at the second microphone to a time when the voice signal arrives at the bone conduction microphone, and x2(τ) is the second sound signal collected by the second microphone.