Advertisements
Advertisements
Question
In an experiment, Anhad studies sound waves. He sets up a loudspeaker to produce sound as shown below :
Anhad adjusts the signal to the loudspeaker to give a sound of frequency 200 Hz.
(a) What happens to the air in-between Anhad and the loudspeaker ?
(b) Explain how Anhad receives sound in both ears.
Advertisements
Solution
(a) The air in between Anhad and speaker vibrates with the frequency of 200 Hz. Sound is a longitudinal wave, so successive compression and rarefaction is formed between Anhad and the speaker.
(b) Anhad receives sound in the right ear by the sound waves transmitted directly from the loudspeaker, and in his left ear, he receives sound from sound waves reflected from the classroom wall.
APPEARS IN
RELATED QUESTIONS
A person is listening to a tone of 500 Hz sitting at a distance of 450 m from the source of the sound. What is the time interval between successive compressions from the source?
Describe an experiment to show the production of sound having low and high pitch.
Define the term amplitude of a wave. Write its S.I. unit.
The wavelength of the vibrations produced on the surface of water is 2 cm. If the wave velocity is 16 ms-1, calculate:
- no. of waves produced in one second
- time required to produce one wave.
A sound wave of wavelength 1/3 m has a frequency 996 Hz. Keeping the medium same, if frequency changes to 1328 Hz. Calculate
- velcoity of sound
- new wavelength.
State the effect of pressure on the speed of sound in air.
How do the following factor affect the speed of sound in air?
Pressure in air.
What is echolocation? How do animals make use of this phenomenon?
Why does an empty vessel produce more sound than a filled one?
Why is the ceiling and wall behind the stage of good conference halls or concert halls made curved?
