3.30 describe an experiment using an oscilloscope to determine the frequency of a sound wave
Experiment: To determine the frequency of a sound wave
- Sound is produced by a loudspeaker.
- The microphone catches the sound and transmits it into electrical signal.
- The electrical signal is feed to the oscilloscope.
- The oscilloscope displays the electrical signal as wave pattern.
- The time base knob is adjusted for value 5 ms per division.
- Now count the number of division occupied by one cycle of the wave.
- Calculate the time for one cycle (T).
- Now, frequency, f=1/T