Sound and Intensity

Unit for measuring Sound Intensity

• A. Joules

• B. Lambda (λ)

• C. Watts / Metre² or Decibel

• D. Hertz

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Which of the following will absorb sound best?

• (a) Thermocol

• (b) Steel

• (c) Paper

• (d) Glass

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Sound Intensity is also called __________

• A. Frequency

• B. Amplitude

• C. Sound Waves

• D. Acoustic Intensity

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The process of blocking sound is called

• (a) Oscillatory motion

• (b) Sound Insulation

• (c) Noise Conduction

• (d) Vibratory Motion

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What is the relation between Sound Intensity and Amplitude?

• A. They are Inversely Proportional

• B. They are Directly Proportional

• C. They are Non – Linearly Proportional

• D. None of these

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What sound is disturbing to the human ear?

• (a) Above 120 dB

• (b) Above 85 dB

• (c) Below 20 dB

• (d) Below 900 dB

Shown here is a graph depicting different levels of Amplitude. Which one of the marked points will have highest Sound Intensity, keeping values of amplitude in mind? (Note - Points are A, B and C)

• A. Point A

• B. Point B

• C. Point C

• D. All Points are equal in Sound Intensity.

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In concert halls, soft materials and carpets are used to

• (a) Increase sound waves

• (b) Absorb sound waves

• (c) Retract sound waves

• (d) Refract sound waves.

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What are the factors that influence Sound Intensity?

• A. Distance travelled by sound wave

• B. Amplitude of sound wave

• C. Both A and B

• D. Frequency of sound wave

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Sound intensity increases with

• (a) Increase in temperature

• (b) Source of sound

• (c) Decrease in temperature

• (d) Increase in distance from source of sound