Acoustic beamforming

OData support
Dr. Sujbert László
Department of Measurement and Information Systems

Nowadays acoustic camera systems are utilized industry-wide in order to locate sources of acoustic signals. This technique provides a means to measure the characteristics of otherwise hardly approachable objects that act as acoustic sources. The acoustic camera system usually consists of a carefully designed microphone array, a stage fit for signal shaping, and a signal processing unit. The method of processing the signals of an acoustic camera is usually referred to as acoustic beamforming.

The present thesis describes the designing and realization process of a basic acoustic beamforming system. It also presents measurements as proof that the implemented hardware-software assembly is capable of precisely locating acoustic sources in the frequency range of 200 Hz and 8 kHz. The main limitations of the systems are the slightly long runtime of the processing algorithm, and the fact that it is not capable of processing signals in a real-time manner. The thesis also provides some ideas how to improve the acoustic camera in these directions.


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