Sound & Acoustics MCQs with Answers

Sound travels faster in _?

• A.Air
• B.Water
• C.Iron
• D.Vacuum

By increasing the amplitude of sound waves, the loudness of sound _?

• A.Increases
• B.Decreases
• C.Remains the same
• D.First increases then decreases

Sound frequencies lower than 20 Hz are referred to as ?

• A.Ultrasonic
• B.Hypersonic
• C.Supersonic
• D.Infrasonic

A closed organ pipe is excited to produce the third overtone of the air column. Then it will have ?

• A.Three nodes and three antinodes
• B.Three nodes and four antinodes
• C.Four nodes and three antinodes
• D.Four nodes and four antinodes

The fundamental frequency of a string stretched with a weight of 4 kg is 256 Hz. The weight required to produce its octave is _?

• A.8 kg wt
• B.12 kg wt
• C.16 kg wt
• D.24 kg wt

Which of the following harmonics is two octaves higher in pitch than the fundamental?

• A.Second harmonic
• B.Third harmonic
• C.Fourth harmonic
• D.Fifth harmonic

Wavelength and time period are related to the velocity of the wave as?

• A.λ = V + T
• B.λ = V / T
• C.λ = T / V
• D.λ = V × T

Rapid back and forth movement of an object is known as?

• A.Oscillation
• B.Vibration
• C.Rotation
• D.Revolution

When sound wave travels from one place to another, what is transported?

• A.Matter
• B.Energy
• C.Both matter and energy
• D.None of these

To find the hidden secrets under the water, the ships and submarines use the _?

• A.Radar system
• B.Sonar system
• C.GPS system
• D.Laser system