What does -ance mean? Definitions for -ance Here are all the possible meanings and translations of the word -ance.
Amplitudes are expressed either as instantaneous values or mostly as peak values. Amplitude is the fluctuation or displacement of a wave from its mean value. With sound waves, it is the extent to which air particles are displaced, and this amplitude of sound or sound amplitude is experienced as the loudness of sound.
Peak-to-peak amplitude is the measure of the change between peak (highest amplitude value) and trough (lowest amplitude value, which can be negative). So, yes, the amplitude can be negative. The amplitude is always a positive measurement, namely half of the height from crest to trough.