Sound and Noise Pollution Quiz

Which of the following produces sound by the vibration of a stretched membrane?

• Flute

• Guitar

• Tabla

• Both B and C

What is the approximate speed of sound in water?

• 343 m/s

• 1,480 m/s

• 5,960 m/s

• 1,100 m/s

Which part of the human ear acts as a funnel to collect sound waves?

• Ear Canal

• Outer Ear

• Eardrum

• Inner Ear

What is the frequency range of audible sound for humans?

• 20 Hz to 20,000 Hz

• 2 Hz to 2,000 Hz

• 200 Hz to 2,000 Hz

• 20 Hz to 2,000 Hz

What is the unit used to measure loudness of sound?

• Hertz (Hz)

• Decibels (dB)

• Newton (N)

• Joules (J)

Which of the following is a method to minimize noise pollution?

• Planting trees

• Increasing vehicle horns

• Constructing factories in residential areas

• Using loudspeakers

What determines the pitch of a sound?

• Amplitude

• Frequency

• Loudness

• Time Period

Which statement about infrasound is correct?

• It has a frequency above 20,000 Hz.

• It is inaudible to humans.

• It is used in medical imaging.

• It can be detected by bats.

Why does sound travel fastest in solids?

• Because they are hard.

• Because particles are tightly packed.

• Because they are elastic.

• Because they have low density.

What causes sound to propagate in air?

• Light waves

• Vibrations of air particles

• Reflection of waves

• Compression and rarefaction of water molecules