waveform
the shape and form of a signal such as a wave moving in a physical medium or an abstract representation
pulse
concept in signal processing
envelope
pattern describing a sound or note's changing amplitude over time
carrier wave
waveform (usually sinusoidal) that is modulated (modified) with an input signal for the purpose of conveying information
triangle wave
non-sinusoidal waveform named for its triangular shape
square wave
type of non-sinusoidal waveform