Indoor space geometric contour reconstruction method based on acoustic mirror image model

Abstract

The invention discloses an indoor space geometric contour reconstruction method based on an acoustic mirror image model; a sound receiver, a phase transformation generalized cross correlation analysismodule, a sound source positioning module, a plane parameter analysis module and the acoustic mirror image model are provided; the method uses sound signals as sound source signal, and uses a movableM array element star array as the sound receiver; the method comprises the following steps: locating the sound source according to a controllable response power phase transformation and area contraction method; using the acoustic mirror image model to obtain distance estimated values between the positions of a talker making single step movement and each indoor reflection surface before and afterthe single step is moved via the cross correlation analysis of sound transmit-receive signals; finally, combining with indoor space shape priors to convert the space geometric contour reconstruction problem into the sound source positioning problem, solving the mirror image sound source position, and realizing the indoor space geometric contour reconstruction. The method can improve the indoor space geometric contour reconstruction accuracy, and considers the sound source versatility, thus obtaining robust contour reconstruction effects.

Description

technical field [0001] The invention belongs to the research field of sound field environment identification, and relates to the reconstruction of indoor spatial geometric contours, specifically an acoustic image model based on a controllable response power phase transformation combined with a region contraction method (SRP-PHAT-SRC) for sound source localization The indoor spatial geometric contour reconstruction method has important application value in scenarios such as synthetic impulse response, auditory analysis, and sound field reconstruction. Background technique [0002] In the indoor environment, the sound wave (20Hz-20KHz) usually has a propagation speed of 340m / s at room temperature (150C), which has a lower propagation speed than electromagnetic waves, so that it can carry room layout information during the propagation process. Through the cross-correlation analysis between the acoustic transceiving signals, recovering the layout information carried in the recei...

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Problems solved by technology

[0006] Aiming at the problem that the indoor space geometric contour reconstruction method has poor reconstruction effect in harsh environments due to the large noise interference and serious reverberation effects in the complex indoor sound field environment, the present invention proposes a method based on the acoustic image model to realize the indoor space geometric contour refactoring method

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