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Frequency

As an auditory definition, frequency is defined as the phenomena of sound energy created by vibration. It is related to but distinct from pitch. Frequency is the measurement of vibrations and is often described as part of a range of frequencies that humans can hear.

Typical range of human hearing:

<20 Hz
20-20kHz
>20kHz
sub-audio rate
audio rate
ultrasonic

 

 

 

Examples:
  • Animals, like our dogs, can hear a different range of frequencies. So something designed for your pet might play a noise at an imperceptible frequency to get their attention but not disrupt their owners.

 


  1. “What is frequency?” Indiana University
  2. [Image source] Spectrum Analyzer – Real Time Sound Frequency Analyzer
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