![]() ![]() ![]() To subtract the unwanted signal correctly, the Acoustic Echo Cancellation (AEC) processor needs to simulate the dynamic room transfer function. This transfer function is also dynamic as objects in the room move or the microphone moves position. These effects are the result of the transfer function of the room. This may include differing signal paths causing reverb, frequency filtering and attenuation. The received far-side signal does not transfer directly from the speaker to the microphone, but is subject to the artifacts of the room. This transmitted signal is a delayed version of the original, which causes the echo. What is acoustic echo and why does it need to be cancelled?Īcoustic echo occurs in a conferencing system when the far-side speech played in local loudspeakers is picked up by microphones in the near-side room and is transmitted back to the far side. Audio Architect in acoustic echo cancellation ![]()
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