reemphasis

Reemphasis is a process of selectively increasing the amplitude of certain frequencies in an audio signal relative to others. This is often done to compensate for signal loss or distortion that may have occurred during transmission or recording, or to enhance specific characteristics of the audio. For example, in telecommunications, reemphasis can be used to boost high frequencies that might have been attenuated during long-distance transmission, making speech clearer and more intelligible. In audio playback systems, it can be employed to counteract the effects of speaker or room acoustics that might dampen certain frequencies. The opposite of reemphasis is deemphasis, where certain frequencies are attenuated. Both processes are crucial in signal processing to ensure the fidelity and quality of the audio signal are preserved or improved. The specific frequencies and the degree of increase are determined by the particular application and the nature of the signal degradation. This technique is widely used in broadcasting, audio recording, and telecommunications.