This set of Audio Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Nature of Sound – 1”.
1. What is the dimension of sound waves in the real world?
a) One-dimensional
b) Two-dimensional
c) Three-dimensional
d) Four-dimensional
View Answer
Explanation: Sound waves are three-dimensional. They start and end at distinct times, they gradually get softer as they travel outwards, and we are able to hear where they are coming from, because the sound changes when moving the small distance between our two ears.
2. As sound requires a medium, it cannot travel through which of the following?
a) Glass
b) Air
c) Vacuum
d) Water
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Explanation: Sound always has to have something to travel through, such as air, water, glass, or metal. They cannot travel through empty space or vacuum, where there are no atoms or molecules to vibrate.
3. What does black dots represent in the below figure?
a) Vacuum
b) Air molecules
c) Electrical signals
d) Frequency
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Explanation: As shown in the figure the sound is coming from a loudspeaker. Here black dots represent air molecules. When the loudspeaker paper diaphragm vibrates due to the applied electrical signal at its voice coils, it causes the surrounding molecules to vibrate in a particular pattern which can be represented by a waveform.
4. What is the effect called in which each single molecule only moves a small distance as it vibrates, and it causes the nearby molecules to vibrate all the way to the ear?
a) Spectral effect
b) Dynamic effect
c) Domino effect
d) Modulation effect
View Answer
Explanation: The domino effect is the effect called in which each single molecule only moves a small distance as it vibrates, and it causes the nearby molecules to vibrate all the way to the ear. A domino effect is the total effect produced when one event sets off a chain of similar events. It is similar to a falling row of dominoes.
5. Which of the following has all the characteristics of a wave like amplitude, frequency, wavelength, phase and velocity?
a) Sound
b) Intensity
c) Air
d) Energy
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Explanation: Sound is a wave motion consisting of train of compressions and rarefactions travelling in a medium. As sound is a wave motion, it has all the characteristics of a wave like amplitude, frequency, wavelength, phase and velocity. Sound wave motion pattern can be represented by a waveform.
6. What is the sound motion curves called?
a) Frequency
b) Cycle
c) Overtone
d) Waveform
View Answer
Explanation: The sound wave motion pattern can be represented by a waveform. The sound motion curve is called “waveform” which means one having the form of the wave. Generally a waveform graph shows a wave travelling along a path from left to right.
7. How do sound waves travel from the point of source?
a) Spherical waves
b) Oval waves
c) Sinewaves
d) Cos waves
View Answer
Explanation: Sound is an analog quantity, that is it varies continuously with time. Sound waves travel like spherical waves from the point source. The 2-dimensional model is enough to understand how sound travel from one place to another.
Sanfoundry Global Education & Learning Series – Audio Engineering.
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