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Graphically differentiate between high pitch sound and low pitch sound.

Important Questions on Sound

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Physics>Waves and Oscillations>Sound>Qualities of Sound

The sound of same pitch and loudness are distinguished from one another by their

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Physics>Waves and Oscillations>Sound>Qualities of Sound

The linear distance between a consecutive compression and rarefaction in longitudinal wave is

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Physics>Waves and Oscillations>Sound>Qualities of Sound
The speed of sound in air at NTP is 332 m/s. If air pressure becomes four times the normal then the speed of sound waves will
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Physics>Waves and Oscillations>Sound>Qualities of Sound
Consider the following statements :
(A) The velocity of sound in air increases due to presence of moisture in it.
(R) The presence of moisture in air lowers the density of air.
In the above statements:
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Physics>Waves and Oscillations>Sound>Qualities of Sound
Which characteristic of sound, makes it possible to recognize a person by his voice without seeing him?
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Physics>Waves and Oscillations>Sound>Qualities of Sound
The velocity of sound wave in a given medium is V when its frequency is ν. The velocity, when the frequency changes to 5ν is :
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Physics>Waves and Oscillations>Sound>Qualities of Sound

For the wave shown in figure, calculate the frequency and wave length of the wave if its speed is 320 ms–1.

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Physics>Waves and Oscillations>Sound>Qualities of Sound
If the speed of wave is 350 m/s and its wavelength is 100 cm then the frequency of the wave will be
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Physics>Waves and Oscillations>Sound>Qualities of Sound
The intensity of a sound appears to an observer to be periodic. Which of the following can be the cause of it?
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Physics>Waves and Oscillations>Sound>Qualities of Sound
Bass control in stereo system increases the power of
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Physics>Waves and Oscillations>Sound>Qualities of Sound
Waves inside a gas are
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Physics>Waves and Oscillations>Sound>Qualities of Sound
The intensity of sound during the festival season increased by, 100 times. This could imply a decibel level rise from-
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Physics>Waves and Oscillations>Sound>Qualities of Sound
If the speed of wave is 250 m/s and its wavelength is 50 cm then the frequency will be:
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Physics>Waves and Oscillations>Sound>Qualities of Sound
Consider the following statements and select the correct alternative: Statement (A): The frequency of the sound wave whose wave length is 1.5 cm with speed 339 m/s is 22600 Hz. Statement (B): The given sound is audible to human beings.
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Physics>Waves and Oscillations>Sound>Qualities of Sound
When sound is refracted from air to water, which of the following will remain unchanged?
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Physics>Waves and Oscillations>Sound>Qualities of Sound
The wave having compression and rarefaction is known as
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Physics>Waves and Oscillations>Sound>Qualities of Sound

The given graph shows the displacement versus time relation for a disturbance travelling with velocity 1500 m/s. The wavelength of the disturbance will be

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Physics>Waves and Oscillations>Sound>Qualities of Sound
Two different instruments (say, guitar and harmonium), playing the same music, their sound appears different though they play same frequency, because:
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Physics>Waves and Oscillations>Sound>Qualities of Sound
A small speaker delivers 2 W of audio output. At what distance from the speaker will one detect 120  dB intensity sound? [Given reference intensity of sound as 10-12 W/m2 ]
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Physics>Waves and Oscillations>Sound>Qualities of Sound
A hearing test is conducted on an aged person. It is found that her threshold of hearing is 20 dB at 1 kHz, and it rises linearly with frequency to, 60 dB at, 9 kHz. The minimum intensity of sound that the person can hear at, 5 kHz is,