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प्रश्न
How is it possible to recognize a person by his voice without seeing him?
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उत्तर १
It is because the vibrations produced by the vocal chord of each person have a characteristic waveform which is different for different persons.
उत्तर २
It is possible to recognize a person by his voice without seeing him because the vibrations produced by the vocal chord of each person have a characteristic waveform which is different for different persons.
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संबंधित प्रश्न
Write true or false for a given statement.
A ticking clock sound is heard late when heard through a metal.
| 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 |
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State the relation between the wavelength and the frequency.
he sound of an explosion on the surface of a lake is heard by a boatman 120 m away and by a diver 120 m below the point of explosion. Out of the two persons, who would hear the sound first? Why?
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Give scientific reason.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
