# What is amplitude and frequency?

Waves are described and measured by five wave parameters: the period, the frequency, the amplitude, the wavelength, and the speed. The period of a wave is the time it takes to complete one cycle. The frequency is just the opposite; it's the number of wave cycles that are completed in one second.

People also ask, what is the relation between amplitude and frequency?

For any wave, the amplitude can be anything. There is a simple relationship between wavelength, frequency, and velocity. You can see this easily: a wave travels one wavelength L in one period P, so v = L/P. The period P is defined as the inverse of the frequency f, so P = 1/f.

How does the amplitude affect the frequency?

No real wave is perfectly linear. A very large amplitude can increase the speed of sound in a medium. If the medium is part a the source that employs resonance, then the frequency increases with the speed of the sound. The frequency of sound can affect the perceived loudness, where amplitude is held constant.

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