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प्रश्न
The safe limit of loudness of audible sound is
विकल्प
0 to 80 dB
above 80 dB
120 dB
above 120 dB
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उत्तर
0 to 80 dB
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संबंधित प्रश्न
Shrillness of a sound is determined by the ______ of vibration.
Name one property of waves that do not change when the wave passes from one medium to another.
A person is standing at the seashore. An observer on the ship which is anchored in between a vertical cliff and the person on the shore fires a gun. The person on the shore hears two sounds, 2 seconds and 3 seconds after seeing the smoke of the fired gun. If the speed of sound in the air is 320 ms-1 then calculate:
1) the distance between the observer on the ship and the person on the shore.
2) the distance between the cliff and the observer on the ship.
When sound propagates in air, it does not carry energy with it.
Two musical notes of the same pitch and same loudness are played on two different instruments. Their wave patterns are as shown in figure.
How do they differ in
(a) loudness,
(b) pitch and
(c) quality
The frequencies of notes given by flute, guitar and trumpet are respectively 400 Hz, 200 Hz and 500 Hz. Which one of these has the highest pitch?
If ______ of sound is decreased, its loudness also decreases.
What does the intensity of sound depend upon?
______ is a general term for the distinguishable characteristic of a wave.
Give scientific reason.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
