Q:

# What is the range of the human voice in decibels?

A:

The human voice ranges from a whisper, 20 decibels, to the loudest shout ever recorded at 121 decibels, which is equivalent to the volume of noise produced by a chainsaw or leaf blower. This record was set by a teacher, Annalisa Flanagan in 2010.

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A normal speaking voice is approximately 70 decibels and an average shout about 88 decibels. Any sound over 120 decibels is painful for humans, and sounds over 150 can cause the eardrum to rupture. To determine the potential for hearing damage, the loudness, in decibels, is weighed against the time of exposure. For instance, the sound of a lawn mower doesn't present a risk of hearing loss unless someone were continuously exposed to the sound for over eight hours.

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## Related Questions

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The infrared portion of the electromagnetic spectrum can be divided into three regions of infrared waves, all of which have different lengths. Far-infrared waves measure from 300 gigahertz to 30 terahertz, while mid-infrared waves range from 30 terahertz to 120 terahertz. Near-infrared waves range from 120 to 400 terahertz.

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Humans can generally hear frequencies from 20 to 20,000 hertz. However, under ideal laboratory conditions, humans have been able to hear frequencies as low as 12 hertz. As humans get older or are exposed to loud sounds that damage their hearing, the highest frequency they can hear decreases.

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The human perception of sound intensity is known as the pitch of the sound. The pitch of the sound is created by the frequency of the sound waves that enter the ear. Human ears have the ability to hear sound frequencies between 20 hertz to 20,000 hertz.