Available Answers

1. 1.

   Fill in the blanks.

   1. The time taken by a wave to complete one oscillation is called its ______________________.
   2. Loudness of a sound decreases with ______________________________ in its amplitude.
   3. A shrill voice has ___________________________ frequency.
   4. The __________________________ distinguishes the sounds of a guitar and a bongo with the same pitch and loudness.
2. 2.

   Name three factors on which loudness of a sound depend.

3. 3.

   Which of the two will have a higher pitch - the sound of a whistle or that of a drum?

4. 4.

   How is pitch different from the frequency?

5. 5.

   What do you understand by quality of sound or timbre?

6. 6.

   Tick the most appropriate answer.

   1. Loudness of a sound depends on the

   1. the wavelength of sound.
   2. volume of air around the vibrating body.
   3. time.
   4. none of these.

   2. The pitch of a sound increases with increase in its

   1. frequency.
   2. loudness.
   3. amplitude.
   4. time period.

   3. The pitch of a flute can be increased by

   1. increase the length of its vibrating air column.
   2. decreasing the length of its vibrating air column.
   3. increase the length of its vibrating string.
   4. decreasing the length of its vibrating string.

   4. A sound produced by guitar and violin with the same pitch and loudness is distinguished by its

   1. frequency.
   2. amplitude.
   3. timbre.
   4. time period.

   5. Which of the following properties of sound is responsible for its loudness?

   1. frequency
   2. pitch
   3. amplitude
   4. quality

   6. Musical sounds are caused due to

   1. regular vibrations.
   2. irregular vibrations.
   3. damped vibrations.
   4. none of these

   7. The sound that never changes in pitch, volume, speed or timbre is known as

   1. monologue.
   2. monolingual.
   3. monophony.
   4. monotone.