A pure tone is a tone with a sinusoidal waveform; this is, a sine wave
of any frequency, phase, and amplitude.
A sine wave is characterized by its frequency, the number of cycles
per second, its amplitude, the size of each cycle, and its phase that
indicates the time alignment relative to a zero-time reference point.
A pure tone has the property – unique among real-valued wave shapes
– that its wave shape is unchanged by linear time-invariant systems;
that is, only the phase and amplitude change between such a system's
pure-tone input and its output.
Sound Pitch (music) Musical tone
^ ANSI S1.1-1994 Acoustical Terminology ^ Stanley Smith Stevens and Edwin B. Newman (1936). "The localization of actual sources of sound". The American Journal of Psychology. 48 (2): 297–306. ^ Hartmann, W. M. (1983). "Localization of sound in rooms". The Journal of the Acoustical Society of America. 74 (5): 1380–1391. doi:10.11