System for audio distribution including network microphones for voice applications

A method for determining one or more spoken words, comprising:

• receiving acoustic audio signals at one or more microphones within a microphone system, and converting the same from acoustical energy signals into electrical audio signals and outputting them as microphone output audio signals;
• receiving the microphone output audio signals from the microphone device at a first input of an acoustic echo cancellation (AEC) device, and receiving a reference input signal at a second input of the AEC device;
• subtracting the reference input signal from the microphone output audio signals;
• and
• outputting the same as a corrected audio signal, and wherein
• the reference audio signal comprises an audio signal generated by an external audio system.

A method for determining one or more spoken words, comprising:

• receiving acoustic audio signals at one or more microphones within a microphone system, and converting the same from acoustical energy signals into electrical audio signals and outputting them as microphone output audio signals;
• receiving the microphone output audio signals from the microphone device at a first input of an acoustic echo cancellation (AEC) device, and receiving a reference input signal at a second input of the AEC device;
• subtracting the reference input signal from the microphone output audio signals;
• and
• outputting the same as a corrected audio signal, and wherein
• the reference audio signal comprises an audio signal generated by an external audio system, and wherein
• the reference audio signal comprises an audio signal generated by an external audio system, and further wherein
• the received acoustic audio signals comprises a combination of a desired spoken audio signal and a delayed version of undesired audio signals, and wherein
• the reference audio signal comprises an undelayed version of the undesired audio signals, and further wherein
• the corrected audio signal comprises substantially only the desired spoken audio signal;
• and
• delaying substantially all of the undesired audio signals by a delay circuit adapted to delay, prior to the undesired audio signals being broadcast by one or more speakers within hearing distance of the one or more microphones.