3C20.10 - Range of Hearing
Demonstrate the approximate frequency range of human hearing.
InstructionsA function generator an amplifier are hooked up to a speaker. Sweep the frequency of the signal from 20 to 20,000 Hz while students listen to determine where their cutoff for hearing exists. Have the students raise their hand when they are no longer able to hear the signal. Use of an oscilloscope can prove to the students that even though they can't hear it, the signal is still being emitted.