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Hearing range describes the frequency range that can be heard by humans or other animals, though it can also refer to the range of levels. The human range is commonly given as 20 to 20,000 Hz, although there is considerable variation between individuals, especially at high frequencies, and a gradual loss of sensitivity to higher frequencies ...
The SI unit of frequency is the hertz (Hz). It is the property of sound that most determines pitch. [1] The generally accepted standard hearing range for humans is 20 to 20,000 Hz. [2] [3] [4] In air at atmospheric pressure, these represent sound waves with wavelengths of 17 metres (56 ft) to 1.7 centimetres (0.67 in).
Hearing thresholds of humans and other mammals can be found with behavioural hearing tests or physiological tests used in audiometry. For adults, a behavioural hearing test involves a tester who presents tones at specific frequencies and intensities . When the testee hears the sound he or she responds (e.g., by raising a hand or pressing a button.
The hearing of older adults is shown to be significantly less sensitive than that of younger adults at frequencies of 4000 and 8000 Hz, corresponding approximately to the piano keys and tones of b′′′′ (B7) and b′′′′′ (B8), respectively. B8 is near the high end of the piano frequency range.
The frequency range of dog hearing is approximately 40 Hz to 60,000 Hz, which means that dogs can detect sounds far beyond the upper limit of the human auditory spectrum. [3] n/a may be up to 100 million times greater than a human. n/a n/a n/a n/a n/a Human: red~650 nm to violet ~400 nm (or) VIBGYOR: 20 Hz to 20,000 Hz (or) Audio: n/a n/a n/a n ...
The range is typically considered to be between 20 Hz and 20,000 Hz. [16] Frequencies higher than audio are referred to as ultrasonic , while frequencies below audio are referred to as infrasonic . Some bats use ultrasound for echolocation while in flight.
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There is also high frequency Pure Tone Audiometry covering the frequency range above 8000 Hz to 16,000 Hz. Threshold equalizing noise (TEN) test; Masking level difference (MLD) test; Psychoacoustic (or psychophysical) tuning curve test; Speech audiometry is a diagnostic hearing test designed to test word or speech recognition. It has become a ...