What is the speed of sound in air at 20°C?
a) 300 m/s
b) 343 m/s
c) 1500 m/s
d) 1200 m/s
Which property of sound waves determines the pitch of the sound?
a) Amplitude
b) Frequency
c) Wavelength
d) Speed
What is the unit of sound intensity?
a) Decibel (dB)
b) Hertz (Hz)
c) Watt (W)
d) Newton (N)
Which of the following is a longitudinal wave?
a) Light wave
b) Water wave
c) Sound wave
d) Electromagnetic wave
What is the term used for the bending of sound waves around obstacles?
a) Reflection
b) Refraction
c) Diffraction
d) Absorption
Which factor affects the speed of sound?
a) Frequency of sound
b) Temperature of the medium
c) Amplitude of sound
d) Color of the medium
What is the phenomenon called when two sound waves of different frequencies interfere with each other to produce a fluctuating sound intensity?
a) Reverberation
b) Doppler effect
c) Beats
d) Diffraction
The frequency range of human hearing is typically between
a) 10 Hz and 1000 Hz
b) 20 Hz and 20,000 Hz
c) 100 Hz and 10,000 Hz
d) 1 Hz and 100,000 Hz
Which of the following materials is the best conductor of sound?
a) Air
b) Water
c) Wood
d) Steel
What causes the Doppler effect?
a) Change in amplitude
b) Change in wavelength due to relative motion
c) Change in speed
d) Change in temperature
What is the reflection of sound waves called?
a) Absorption
b) Reverberation
c) Refraction
d) Diffraction
The wavelength of a sound wave is inversely proportional to
a) Its frequency
b) Its amplitude
c) Its velocity
d) Its energy
Which of the following is an example of a sound that is above the human hearing range?
a) Subsonic sound
b) Ultrasound
c) Infrasound
d) Audible sound
Which of the following is responsible for the echo?
a) Reflection of sound waves
b) Refraction of sound waves
c) Diffraction of sound waves
d) Absorption of sound waves
The speed of sound increases with
a) Decrease in temperature
b) Increase in temperature
c) Increase in frequency
d) Decrease in air pressure
What is the effect called when the frequency of a sound wave changes as the source or observer moves?
a) Resonance
b) Doppler effect
c) Beats
d) Refraction
Which part of the ear helps in detecting sound waves?
a) Cochlea
b) Ear drum
c) Eustachian tube
d) Auditory nerve
The intensity of sound is inversely proportional to the square of the
a) Distance from the source
b) Wavelength
c) Frequency
d) Amplitude
Which of the following is a property of sound waves?
a) Can travel through vacuum
b) Can travel through liquids, solids, and gases
c) Cannot be reflected
d) Cannot be refracted
In acoustics, what does the term ‘resonance’ refer to?
a) When sound waves are absorbed by a material
b) When sound waves are reflected back towards the source
c) When the natural frequency of a system matches the frequency of an external sound wave
d) When sound waves change direction
Which of the following best describes a sound wave in a musical instrument?
a) It is always a transverse wave
b) It is always a longitudinal wave
c) It can be both transverse and longitudinal
d) It is a mixture of sound and light waves
A sound wave with a higher frequency will have
a) A lower pitch
b) A higher pitch
c) A longer wavelength
d) A shorter amplitude
The human ear is most sensitive to sounds in the frequency range of
a) 10 Hz to 100 Hz
b) 20 Hz to 20,000 Hz
c) 100 Hz to 1000 Hz
d) 500 Hz to 5000 Hz
What is the unit of frequency?
a) Hertz (Hz)
b) Decibel (dB)
c) Meter (m)
d) Joule (J)
What is the range of sound frequencies that are referred to as infrasound?
a) Below 20 Hz
b) Between 20 Hz and 20,000 Hz
c) Above 20,000 Hz
d) Between 20 Hz and 1000 Hz
Which of the following phenomena occurs when two sound waves of different frequencies interfere with each other?
a) Refraction
b) Diffraction
c) Beats
d) Echo
When a sound wave travels from air to water, its speed
a) Decreases
b) Increases
c) Remains the same
d) Depends on frequency
Which of the following does not affect the loudness of sound?
a) Amplitude
b) Frequency
c) Distance from the source
d) Medium through which sound travels
Which of the following is used to measure sound intensity?
a) Microphone
b) Oscilloscope
c) Sound level meter
d) Thermometer
What happens to the wavelength of a sound wave as its frequency increases?
a) The wavelength decreases
b) The wavelength increases
c) The wavelength remains constant
d) The frequency does not affect wavelength
