Sound Science - Sound

What type of waves are generated by SONAR device fixed to a fishing ship?

1. Water waves.
2. Radio waves.
3. Sound waves.
4. Infrared waves.

One of the following can hear infrasound. This one is:

1. Dog.
2. Bat.
3. Rhinoceros.
4. Humans.

The speed of highly penetrating ultrasonic waves is:

1. Lower than those of audible sound waves.
2. Higher than those of audible sound waves.
3. Much higher than those of audible sound waves.
4. Same as those of audible sound waves.

When we change a feeble sound to a loud sound, we increase its:

1. Frequency.
2. Amplitude.
3. Velocity.
4. Wave length.

Which of the following device does not work on the multiple reflections of sound waves?

1. Stethoscope.
2. Hydrophone.
3. Soundboard.
4. Megaphone.

Sound is caused by _____.

Loudness of sound depends on _____.

Sound cannot travel through _____.

An echo is simply a ______ Sound.

Echoes are caused by the ______ of sound.

Sound produced by a vibrating body travels to our ears by the actual movement of air.

Name the three characteristic of sound.

Which of the following is the speed of sound in copper and which in aluminium?

1. 5100m/s
2. 1500m/s
3. 3750m/s

Name the characteristic of sound which depends on (a) amplitude (b) frequency, and (c) waveform.

Can sound travel through (a) iron, and (b) water?

A stone is dropped on the surface of water in a pond. Name the type of waves produced.

A wave is moving in air with a velocity of 34m/s. Calculate the wavelength if its frequency is 512 vibrations/sec.

Draw a labelled diagram to show the multiple reflections of sound in apart of the stethoscope tube.

Draw labelled diagrams to represent sound of (a) low pitch, and (b) high pitch, of the same loudness.

What is the difference between infrasonic waves and ultrasonic waves?

How is sound produced? Explain with the help of an example.

A device called oscillator is used to send waves along a stretched string. The string is 20cm long, and four complete waves fit along its length when the oscillator vibrates 30 times per second. For the waves on the string:

1. What is their wavelength?
2. What is their frequency?
3. What is their speed?

Which object is vibrating when the following sounds are produced?

1. The sound of a sitar.
2. The sound of table.
3. The sound of a tuning fork.
4. The buzzing of a bee or mosquito.
5. The sound of a flute.

Why do we hear more clearly in a room with curtains then a room withour curtains?

Explain the terms 'crests' and 'troughs' of a wave? What type mof waves consist of crests and troughs?

What is ultrasound? What is the difference between ordinary sound and ultrasound?

How does sound from a sound producing body travel through air to reach our ears? Illustrate your answer with the help of a labelled diagram.

Explain the terms 'compression' and 'rarefactions' of a wave. What type of waves consist of compressions and rarefactions?

How can reverberations in a big hall or auditotium be reduced?`

What is the difference between a compression and a rarefaction in a sound wave? Illustrate your answer with a sketch.

What is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in: (a) a city (b) a village (c) a bare room (d) a furnished room.