Sound and Doppler Effect - sound Intensity, Loudness, Pitch, Quality and timbre, Reverberation time, reverberation of hall, Sabine’s formula : Link1
Sound and Doppler Effect MCQ & Answers
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Q.1. Which one of the following statement is false.
A. Sound of mosquito produces high pitch than the sound of a lion.
B. Sensitivity increases with a decrease in intensity.
C. The normal hearing range is between 20 Hz and 80,000 Hz.
D. Reverberation time is independent of the shape of the room.
Q.2.A Sounds of frequency higher than 20,000 Hz which are inaudible to normal human ear are called ------.
A. noise
B. frequency
C. ultrasonic m D. amplitude
Q.3. The loudness and amplitude of sound varies -------.
A. directly
B. inversely
C. not related
D. proportionally
Q.4. The scale to measure the intensity level of sound is called ------.
A. vector scale
B. measuring ruler
C. bel scale
D. decibel scale
Q.5. The pitch of sound depends on -------.
A. frequency
B. amplitude
C. frequency and amplitude
D. none of the above
Q.6. What is the quantity that helps us distinguish a particular voice of a singer from the voice of many singers?
A. Pitch
B. Timbre
C. Intensity
D. Music
Q.7. The hearing range of human ear is ------.
A. 20 Hz to 25,000 Hz
B. less than 20 Hz
C. more than 20,000 Hz
D. 20 Hz to 20,000 Hz
Q.8. What happens if the reverberation time is too larger?
A. The sound becomes inaudible
B. Echoes are produced
C. Frequency becomes high
D. The sound becomes infrasonic
Q.9. What happen when window panel sections of the wooden portions are thrown into vibrations to produce new sounds?
A. vibrations are produced
B. resonance occurs
C. echoes are produced
D. absorption occurs
Q.10. Which one of the following statement is false.
A. Red shift describes the effect of the Doppler shift on the appearance of stars moving towards earth.
B. Doppler effect phenomena can be applied to estimate the velocity of star with respect to earth.
C. The Doppler effect is a change in frequency due to the relative motion of a source of sound.
D. Doppler effect increase the intensity of wave when its source approach the observer.