Abstract: The source location technology has an important application in areas such as video conference, voice recognition, target location and hearing devices. Sound sensor array is composed by certain sound sensors. Compared with a single sound sensor, it can improve SNR. It has strong space selective and is available to sound signal without moving. At the same time, it can realize the self-adaptive detection, localization and tracking of sound source in a certain range, which makes it have wide application in many areas. How to blend the audio data from each node to achieve the accurate positioning and tracking is a hot study at present. This paper uses TI's MSP430F149 MCU as the control core of the sound sensor array spatial positioning system, selects a buzzer as the sound source. Different receiving points which on the space coordinate system collects sound signals to amplify and filter. According to the processed signal, MCU applies the positioning theory based on delay to form space coordinate localization algorithm and locate the sound source. The realization method is simple and test results indicate the position of high precision.
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Received: 19 May 2010
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