Sound & Acoustics MCQs with Answers

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Sound is a form of mechanical energy that travels through a medium as vibrations or waves.

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Acoustic signals can be both easy and difficult to detect depending on factors like frequency, distance, medium, and background noise.

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The distance between two successive crests or troughs of a wave is called wavelength.

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The speed of sound in blood at 37°C is 1570 m/s.

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The pitch of a sound wave depends on its frequency — higher frequency produces a higher pitch and lower frequency produces a lower pitch.

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The unit for measuring the intensity of noise (sound intensity level) is the Decibel (dB).

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Shrill sound can be differentiated from a grave sound by pitch of sound.

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Sound travels at medium speed through liquids, faster than in gases but slower than in solids.

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Sound travels faster through solids than through both liquids and gases because particles are more closely packed in solids, allowing vibrations to transfer more quickly.

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The distance between a node and an adjacent antinode in a stationary wave is λ/4 (one-quarter of the wavelength).