Vive La Différence


If two sounds of different frequencies are played together, they can produce a “difference tone” or a sound that has a frequency that is determined by subtracting the frequency of the lower tone from the higher tone. For example, two adjacent strings on a string instrument are separated by a perfect fifth are played together. In addition to the tone of each individual string, an additional tone that is an octave below the lower tone (or difference tone), is also…

Source: Living With Insects Blog

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