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Julian Allen——Works at the International Seabed Authority, Lives in Kingston, Jamaica.
As we've noted, frequency is measured in Hertz (Hz) or cycles per second (CPS). A person with exceptionally good hearing will be able to hear sounds from 20-20,000 Hz. Since both ends of the 20-20,000Hz range represent rather extreme limits, the more common range used for FM radio and TV is from 50 to 15,000 Hz.read more >>+119962023-04-26 23:01:01
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