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