A method of identifying patterns in a digitized acoustic signal is disclosed. The method comprises: (i) converting the digitized acoustic signal into a spatial representation being defined by a plurality of regions on a vibrating membrane, each the regions having a different vibration resonance, each...http://www.google.com.au/patents/US7366656?utm_source=gb-gplus-sharePatent US7366656 - Method apparatus and system for processing acoustic signals
