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Pure tone is a single frequency tone with no harmonic content (no overtones). This corresponds to a sine wave. It is characterized by the frequency - the number of cycles per second, the wavelength - the distance the waveform travels through its medium within a period, and the amplitude - the size of the cycles.

The Fourier theorem states that any periodic waveform can be decomposed as the sum of a series of sine waves with frequencies in a harmonic series and at specific phase relationships to each other.

Musical instruments usually generate tones composed of several sinusoidal waves with harmonic frequencies. The lowest of these frequencies (the fundamental frequency) determines the pitch of the tone, which is perceived by the human hearing. In music, notesThis article is about music. For information about money, see banknote. In music, a note is either a unit of fixed pitch that has been given a name, or the graphic representation of that pitch in a notation system, and sometimes its duration, or a specifi are assigned to tones with different fundamental frequencies, in order to describe the pitch of played tones. Music theoryMusic theory is a set of systems for analyzing, classifying, and composing music and the elements of music. Narrowly it may be defined as the description in words of elements of music, and the interrelationship between the notation of music and performanc AcousticsAcoustics is a branch of physics and is study of sound, mechanical waves in gases, liquids, and solids. A scientist who works in the field of acoustics is an acoustician . The application of acoustics in technology is called acoustical engineering. There



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