![]() Generally, these would not be useful for making measurements. The sound of rain on a metal roof, the sound of a waterfall, static between radio stations, and the “snow” on a TV screen not tuned to an active channel are all examples of random noise. With 1/24-octave analysis and 10,000 point averaging. This figure shows the lower dynamic range of the swept frequency measurement. ![]() Figure 1: Comparison of a swept frequency response (upper trace) with a pink noise response.
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