In linear amplification, how is gain applied?

In linear amplification, gain is applied uniformly regardless of sound intensity. This means that the amplifier boosts the input signal by the same proportional amount across all levels of sound intensity, ensuring that quieter sounds are amplified just as much as louder sounds. This uniform gain characteristic is crucial in applications like hearing aids and sound systems, where it is important for all sounds within a listening range to be adequately amplified without distortion or unevenness.

Other methods of applying gain, such as fluctuating based on the environment or only during loud sounds, would introduce inconsistencies in the amplification process, resulting in an unnatural sound experience. The goal of linear amplification is to maintain the integrity of the original signal while enhancing its volume, which is only achievable with uniform gain applied across the entire range of sound intensities.