Patent ID: 9510098
Filing Date: 2016-11-29
CPC Classification: H04R,H04S

Claim Text:
1. A method for recording a three-dimensional (3D) sound field, used to record a 3D sound field including a plurality of sound sources, and comprising Step 1: establishing a microphone array including a plurality of microphones in a 3D sound field, and receiving and recording with each microphone sound waves emitted by the sound sources and each sound wave having characteristics of a plane wave; Step 2: calculating a sound pressure of each sound wave detected by each microphone in Step 1, with wherein s(ω) is a Fourier Transform of a sound source signal, x wherein Equation (2) is a vector form of Equation (1), wherein a(k)=[e wherein p(x wherein p (ω) represents the sound pressure detected by the microphone array; Step 3: applying a direction of arrival (DOA) algorithm to the sound pressure of each microphone to locate sound source signals of the sound waves calculated in Step 2, and obtaining an orientation expression of each sound source signal; and Step 4: using the orientation expression, a Tikhonov regularizing method and convex optimization to identify the sound source signal.