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प्रश्न
High-frequency sounds that cannot be heard by you are called _______.
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उत्तर
High-frequency sounds that cannot be heard by you are called Ultrasonic.
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संबंधित प्रश्न
Write the audible range of frequency for the normal human ear.
On what factor does the loudness of a sound depend ?
Give two examples each of longitudinal waves and transverse waves.
A source of wave produces 40 crests and 40 troughs in 0.4 s. What is the frequency of the wave?
How is sound produced?
Match the following.
| Ultrasonics | Frequency below 20Hz |
| Speed of sound in air | Needs material medium |
| Infrasonics | 330ms-1 |
| Sound propagation | Frequency more than 20000 Hz |
If the energy in a longitudinal wave travels from south to north, the particles of the medium would be vibrating in _____.
Lightning can be seen the moment it occurs. Paheli observes lightning in her area. She hears the sound 5 s after she observed lightning. How far is she from the place where lightning occurs? (speed of sound = 330 m/s).
What happens to the speed of sound when it gases from a solid to a gaseous state?
Sound travels in the air as ______ wave.
