Advertisements
Advertisements
प्रश्न
What is a soundboard ? Explain the working of a soundboard with the help of a labelled diagram.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Define the term Frequency (as applied to sound waves)
Write the approximate value of the speed of sound in water.
What is meant by echo depth sounding?
What are fishing boats?
State two factors on which the natural frequency of a body depends.
When a sound is made from a distance of 18 m, in front of a tall building, it is found to get repeated again. Which phenomenon is associated with this observation? Give a brief explanation of this phenomenon?
Draw a diagram representing a wave of amplitude 4 cm and wavelength 2 m. If the frequency of the wave is 150 Hz, calculate its velocity.
In what respect does waveforms of noise and a musical note differ. Draw diagrams to illustrate your answer.
