![]() Your computer probably has the hardware to do this already a computer which performs a calculation upon these numbers.Series of numbers (representing the microphone voltage) an analogue-digital converter which converts this to a.a microphone which measures the sound pressure over a.Today, sound spectra (the plural of spectrum is spectra) are usually Spectrum as a sound recipe: take this amount of that frequency,Īdd this amount of that frequency etc until you have put together Hertz, abbreviation Hz) or thousands of vibrations per second The power or pressure is usually measured in decibelsĪnd the frequency is measured in vibrations per second (or It is usually presentedĪs a graph of either power or pressure as a function of frequency. Of vibration at each individual frequency. – usually a short sample of a sound – in terms of the amount Of high notes and low notes, and some sounds (such as drum beatsĪnd cymbal crashes) which have no clear pitch.Ī sound spectrum is a representation of a sound Music playing in the background, in which case there is a mixture Wind outside, the rumble of traffic - or perhaps you have some (There is an introduction to sound and vibrations in the document "How woodwind instruments work".) Most sounds are made up of a complicated mixture of vibrations. A sound spectrum displays the different frequencies present in a sound.
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