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Good Hearing?
A typical person with good hearing can hear from about 20Hz to 20kHz (the audio bandwidth). A person's voice will usually range from 500Hz to 2kHz...more
The Decibel Scale
Gives an approx of human perception of loudness. This is because the human ear has a logarithmic response to changes in sound level...more
Commercial_Air_Testing is sometimes referred to as Commercial AIR pressure tests, Commercial AIR tightness tests, Commercial AIR tests, Commercial AIR pressure testing, Commercial AIR tightness testing.
For further Air_Testing information for your area, be sure to check out Air-Testing-.co.uk.
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