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प्रश्न
What is a soundboard ? Explain the working of a soundboard with the help of a labelled diagram.
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उत्तर
A soundboard is a concave board that is placed behind the speaker in large halls or auditoriums so that the speech can be easily heard even by the person sitting at a considerable distance. The soundboard works in the following manner as the speaker is placed at the focus of the concave board. The concave surface of the soundboard reflects the sound of the speaker toward the audience and hence prevents the spreading of sound in various directions. Due to this, sound is distributed uniformly throughout the hall and even the persons sitting at the back of the hall can hear the speech easily.
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संबंधित प्रश्न
The displacement distance graph of two sound waves A and B, travelling in a medium, are as shown in the diagram below.
Study the two sound waves and compare their:
- Amplitudes
- Wavelengths
Define frequency term in relation to a wave.
How do bats avoid obstacles in their way, when in flight?
What adjustments would you make for tuning a stringed instrument for it to emit a note of a desired frequency?
Name two sound absorbing materials (or objects) which can make our big room less echoey.
What do you mean by reflection of sound? State one condition for the reflection of a sound wave. Name a device in which reflection of sound wave is used.
What are infrasonic waves?
What is meant by echo depth sounding?
What is mean by the reflection of sound?
