Differentiate between a high pitch sound and a low pitch sound.
Write the audible range of frequency for the normal human ear.
Describe an experiment to show the production of sound having low and high pitch.
Write true or false .
Loudness depends on frequency.
Fill in the blank.
The number of times a body vibrates in one second is called its.........................
What are ultrasonics ? Can you hear the ultrasonic sound ?
You recognize your friend by hearing his voice on a telephone. Explain.