Our department is developing a microphone array with appropriate signal processing algorithms for the ANITA project. This includes the definition and evaluation of an optimum array geometry and investigation of new signal processing algorithms suitable for implementation in PMR devices. Particulary adaptive algorithms for hostile acoustical environments in the field of acoustic echo cancellation, adaptive beamforming and blind source separation have to be examined. It is essential that these algorithms adapt fast enough to ensure sufficient noise suppression to allow efficient communication. The project goal is the integration of the noise suppression algorithms in a prototype suitable for retro-fitting to the existing installed radio systems in use with the emergency services throughout the EU.
Microphone array prototype mounted in a fire brigade car