Adaptive Gain Control (AGC) is a technique designed to maintain consistent audio levels. In real-world recordings, speech amplitude often varies due to factors such as speaker distance, environmental conditions, and background noise. AGC compensates for these variations by automatically adjusting the signal gain, improving overall clarity and intelligibility. However, the performance of AGC methods varies significantly. Certain approaches may amplify background noise, introduce abrupt gain transitions, or distort the natural characteristics of speech.
This page presents a comparative analysis of multiple AGC systems, including the proposed WaveNorm AGC, with a focus on their response to:
Each sample below contains the same audio processed by different AGC methods. You can listen, compare, and visually inspect the waveform to understand how each system behaves.