Sound Physics and Wave Properties
Physics quiz covering sound wave characteristics, frequency, amplitude, Doppler effect, hearing ranges, noise pollution, echoes, reflection, and ultrasonic waves
Questions
Which of the following is/are the measure(s) to control noise pollution?
- Plantation of trees along the roads and around buildings
- Minimising the use of automobile horns
- Installation of silencing devices in aircraft engines and transport vehicles
- All of the above
Which of the following statements is/are true?
(a) Noise pollution can cause partial hearing impairment.
(b) Air conditioners do not contribute to noise pollution.
(c) Presence of excessive sound in environment is termed as noise pollution.
- Only (a)
- Both (a) and (c)
- Both (b) and (c)
- Only (b)
If a sound is high-pitched and feeble, the sound wave has
- high frequency and high amplitude
- high frequency and low amplitude
- low frequency and high amplitude
- low frequency and low amplitude
In Doppler effect, when the sound source moves away from the receiver at rest, the frequency of sound that is heard
- increases
- decreases
- remains the same
- None of these
Doppler effect is applicable to
- light waves only
- sound waves only
- both sound and light waves
- neither light nor sound waves
A group of sound waves of high pitch is known as
- resonance
- beats
- bass
- treble
The normal frequency range of hearing in a bat is
- 20 – 20,000 Hz
- 40 – 120,000 Hz
- 60 – 65,000 Hz
- 15 – 50,000 Hz
- None of these
Which of the following health problems cannot be caused on exposure to excessive noise in our surroundings?
- Hypertension
- Anxiety
- Skin cancer
- Lack of sleep
Which of the following wave characteristics determines the pitch of sound?
- Amplitude
- Frequency
- Speed
- Loudness
Echoes are heard due to
(a) successive reflections
(b) multiple refractions
(c) multiple sources
- Only (a)
- Both (b) and (c)
- Both (a) and (b)
- Only (c)
Which of the following is/are induced in a medium of propagation of sound when a sound wave is travelling through it?
- Echo
- Vibrations
- Reverberations
- All of the above
In which of the following phases of his mission to Moon could Neil Armstrong not hear any sound except for the sound produced by his headset?
- When he was training for weightless conditions submerged below the water surface in a water tank
- When he was training for the mission in high altitude test flights in very rarified atmosphere
- When he was actually travelling in the Saturn V rocket in space
- When he was walking on the surface of Moon
Which of the following do(es) not employ the phenomenon of reflection of sound?
- Megaphone
- Stethoscope
- Two persons talking in a small room
- A theatre with curved ceiling
What is the frequency range of an ultrasonic wave?
- 0 – 20 Hz
- 20 – 20,000 Hz
- Beyond 20,000 Hz
- 0 – 20,000 Hz
Why are ultrasonic waves preferred for industrial application?
a. Because of their high frequency
b. Because of their tendency of travelling in a straight line
c. Because of their high penetrating power
- Both a and b
- Both b and c
- Both a and c
- Only a