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प्रश्न
Which characteristics of the sound helps you to identify your friend by his voice while sitting with others in a dark room?
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उत्तर
Quality of sound is that characteristic which helps us identify a particular person. Sound produced by two persons may have the same pitch and loudness, but the quality of the two sounds will be different.
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संबंधित प्रश्न
Guess which sound has a higher pitch: guitar or car horn?
| Column A | Column B |
| (a) Vibrations cause | (1) absorb sound |
| (b) A shriller sound is | (2) second |
| (c) Unit of frequency | (3) sound |
| (d) Unit of time period | (4) of high pitch |
| (e) Curtains | (5) hertz |
Describe an experiment to show the production of sound having low and high pitch.
Give two examples each of longitudinal waves and transverse waves.
Fig. shows three ways in which a string of length l in an instrument can vibrate.
 |
 |
 |
| (i) | (ii) | (iii) |
- Which of the diagram shows the principle note?
- Which vibration has the frequency four times that of the first?
- Which vibration is of the longest wavelength?
- What is the ratio of the frequency of the vibration in (i) and (ii)?
What do you mean by the audible range of frequency?
What do you understand by the term sound energy?
A thin metal plate is placed against the teeth of cog wheel. Cog wheel is rotated at a speed of 120 rotations per minute and has 160 teeth. Calculate:
- frequency of node produced.
- speed of sound, if wavelength is 1.05 m.
- what will be the effect when the speed of cog wheel is doubled?
How do the following factor affect the speed of sound in air?
Temperature of air
The elastic property of medium is a factor of ______ medium.
