| Subject: | 1. Re: Initial SASS test shows bands of harmonics |
|---|---|
| From: | "Scott Fraser" scottbfraser |
| Date: | Fri Mar 16, 2012 7:34 am ((PDT)) |
<< The interference was a single frequency, but it was a square wave, and s= quare waves can be created with a series of different frequencies of sine w= aves, hence the regular bands shown on the spectrogram, which I assume thin= ks everything is constructed from sine waves. Correct?>> Every sound, other than sine waves, consist of multiple frequencies, which,= in the case of musical tones, are mathematically related, or in the case o= f what is considered noise, are unrelated. What you see with a square wave = is a fundamental frequency & its overtones, all occurring at precise multip= les of the fundamental frequency. Sine waves are devoid of any harmonics. Scott Fraser |
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