Traditionally in Western music , a MUSICAL TONE is a steady periodic sound. A musical tone is characterized by its duration , pitch , intensity (or loudness ), and timbre (or quality). The notes used in music can be more complex than musical tones, as they may include aperiodic aspects, such as attack transients , vibrato , and envelope modulation .
A simple tone, or pure tone , has a sinusoidal waveform . A COMPLEX TONE is a combination of two or more pure tones that have a periodic pattern of repetition.
* 1 Pure tone
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A PURE TONE is a tone with a sinusoidal waveform , e.g. a sine or
cosine wave. This means that regardless of other characteristic
properties such as amplitude or phase, the wave consists of a single
A sine wave is characterized by its frequency, the number of cycles per second—or its wavelength , the distance the waveform travels through its medium within a period—and the amplitude , the size of each cycle. A pure tone has the unique property that its waveshape and sound are changed only in amplitude and phase by linear acoustic systems.
A pure sine wave is an artificial sound.
Hermann von Helmholtz
The lowest of these frequencies (the fundamental frequency ), which is also the inverse of the period of the waveform, determines the pitch of the tone, which is perceived by the human hearing. In music, notes are assigned to tones with different fundamental frequencies, in order to describe the pitch of played tones.
* ^ Juan G. Roederer (2008). The Physics and Psychophysics of Music: An Introduction (fourth ed.). Springer. p. 4. ISBN 978-0-387-09470-0 .
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