Speech recognition system for equipment control e.g. lighting and radio - has input processed to identify key spectrum content for simple commands to control setting and on=off switching

摘要

The speech recognition system has its input provided by a microphone and amplified to provide an acidic input to the identification stage. The output connects with flip-flops (FF) coupled to transistors and relays (R1-R3) controlling the level of lighting provided by a halogen lamp. Signal word commands are identified by specific frequency spectrum components. The detector circuit provides for identification on the basis of the signals being above the background noise level. ADVANTAGE - Reliable speech detection for control purposes.