Available Answers

1. 1.

   Why is the voice of a woman shrill as compared to that of a man?

2. 2.

   What is the audible frequency range for a human ear? What is the sound in this range called?

3. 3.

   What is the speed of sound in air? Name the atmospheric conditions due to which the speed of sound in air varies.

4. 4.

   List the factors on which the loudness of sound depends.

5. 5.

   What is reflection of sound? Name its application.

6. 6.

   Write three usage of ultrasonic sounds.