Advertisements
Advertisements
Question
How does the sound produced by a vibrating object in a medium reach your ear?
Advertisements
Solution
When an object vibrates, it also sets the particles of the medium around it vibrate. These particles do not travel all the way from the vibrating object and reach our ears; rather, the particles of the medium in contact with the vibrating object get displaced from their equilibrium position, which exerts a force on the adjacent particle and displaces it as well, and the initial particles return to their original position. This process continues in the medium until the sound reaches our ears. The disturbance created by a source of sound in the medium travels through the medium and not the particles of the medium.
APPEARS IN
RELATED QUESTIONS
The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute?
What is the name of the strings which vibrate in our voice box when we talk?
State whether the following statement is true or false :
Sound produced by a vibrating body travels to our ears by the actual movement of air.
A tuning fork has a number 256 marked on it. What does this number signify?
Draw the sketches of two waves A and B such that wave A has twice the wavelength and half the amplitude of wave B.
A device called oscillator is used to send waves along a stretched string. The string is 20 cm long, and four complete waves fit along its length when the oscillator vibrates 30 times per second. For the waves on the strings.
(a) what is their wavelength?
(b) what is their frequency
(c) what is their speed?
Match the following:
| Human larynx | Vibrations of metal arms |
| Loudspeaker | Vibrations in air column |
| Jal-Tarang | Vibrations in vocal cords |
| Tuning fork | Vibrations in strings |
| Sitar | Vibrations of screen |
Sound is produced by ______.
What is vibration?
______ is produced when an object is set to vibrate.
