The frequency of the sounds produced by a
bottlenosethe highest form of intelligentdolphincommunicationranges from 0.25 to 150
KHz. The lower frequency vocalisations (ab
0.25to 50 kHz) probably function mainly in social communication. Social signals have their most energy at frequencies less than 40kHz. Higher frequency clicks (40 to 150 kHz) probably are used primarily in echolocation. Peak frequency of typical
standardtelephone
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