Online Questions and Answers Topic Outline
- MCQs in Acoustics Terms and Definition
- MCQs in Frequency Range
- MCQs in Sound Pressure Level
- MCQs in Sound Intensity
- MCQs in Loudness Level
- MCQs in Pitch and Frequency
- MCQs in Internal and Octave
- MCQs in Sound Distortion
- MCQs in Room Acoustics
- MCQs in Electro-Acoustics Transducers
MCQs in Acoustics Series
Following is the list of multiple choice questions in this brand new series:
Continue Practice Exam Test Questions Part II of the Series
51. What is the dB SPL of a voice paging in an office?
- a. 90
- b. 65
- c. 55-60
- d. 80-85
52. What is the dB SPL of an auditorium with contemporary music?
- a. 80-95
- b. 85-90
- c. 95-100
- d. 100-105
53. What is the church dB SPL with speech reinforcement only?
- a. 90
- b. 80-85
- c. 85-90
- d. 90-95
54. Intensity can also be called as
- a. Volume
- b. Loudness
- c. Sharpness
- d. Strength
55. The loudness of a sound depends upon the energy of motion imparted to ________ molecules of the medium transmitting the sound.
- a. Transmitting
- b. Running
- c. Moving
- d. Vibrating
56. _________ is affected by the distance between the listener and the source of the sound and its intensity varies inversely with the square of its distance.
- a. Volume
- b. Bass
- c. Treble
- d. Loudness
57. If the distance between the listener and the source of the sound is doubled, the intensity is reduced to
- a. ½
- b. 1/3
- c. 2/3
- d. 1/4
58. If the distance between the listener and the source of the sound is decreased to ½ tye original amount, the intensity of the sound would be
- a. 2 times as great
- b. 3 times as great
- c. 4 times as great
- d. 5 times as great
59. At a sensation level of 40 dB, 1000 Hz tone is
- a. 1000 mels
- b. 500 mels
- c. 2000 mels
- d. 100 mels
60. If the sound waves are converted to electrical waves by a microphone, what is the frequency of the electric current?
- a. 3 - 30 MHz
- b. 25 – 8000 Hz
- c. 4 – 40 Hz
- d. 30 – 3000 Hz
61. For a music lover concert “A” is 440 Hz. If a musical note one octave higher were played, it would be _______ that frequency.
- a. One – half
- b. One-fourth
- c. Double
- d. Triple
62. In a 220 Hz, if a note was played one octave lower, it would be ______.
- a. 22 Hz
- b. 27.5 Hz
- c. 440 Hz
- d. 110 Hz
63. Much of music is generally referred to in
- a. Harmonics
- b. Good hearing
- c. Fidelity
- d. Octaves
64. _________ is an undesired change in wave form as the signal passes through a device.
- a. Noise
- b. Vibration
- c. Distortion
- d. Harmonics
65. Distortion enhances intelligibly when an ________ is added.
- a. Equalizer
- b. Igniter
- c. Exciter
- d. Emulsifier
66. A class of signal processors.
- a. Amplifiers
- b. Equalizers
- c. Microprocessors
- d. Exciters
67. Half construction and internal finishes affect the final sound quality ________.
- a. poorly
- b. mildly
- c. significantly
- d. badly
68. Positioning a loudspeaker near a wall can dramatically alter its frequency response in two distinct ways namely;
- a. Gump and dump
- b. Hump and notch
- c. Fade and gone
- d. Bad and worst
69. The acoustics of most auditoria are very ________ when the room is full compared to the empty condition.
- a. Different
- b. Similar
- c. Good
- d. Bad
70. A _________ converts acoustical energy.
- a. Electro-acoustic
- b. Microphone transducer
- c. Microphone
- d. Electric Microphone
71. All microphone have two basic components namely, ___________.
- a. Wired and body
- b. Ceramic and crystal
- c. Diaphragm and generating element
- d. Coil and magnet
72. The kinds of generating elements are __________.
- a. Expense and fidelity
- b. Complexity and ruggedness
- c. Longevity
- d. All of these
73. When the average absorption is greater than 0.2, __________ formula is used to compute the actual reverberation time.
- a. Sabine
- b. Stephen and Bate
- c. Norris-Eyring
- d. Notch
74. At room temperature, what is the velocity of sound in meters/seconds?
- a. 348.03 cm/s
- b. 980 cm/s
- c. 980 m/s
- d. 341.8 m/s
75. Calculate the velocity of sound in ft./sec. if the temperature is 1490C?
- a. 1530.03 ft/sec
- b. 1320 ft/sec
- c. 1357.03 ft/sec
- d. 1920.345 ft/sec
76. The wavelength of a sound of 20 kHz frequency is
- a. 16.5 m
- b. 16.5 cm
- c. 16.5 mm
- d. 16.5 um
77. The radio of frequencies is termed
- a. Octave
- b. Interval
- c. Harmonics
- d. Masking
78. What is the increase in sound pressure level in dB, if the pressure is doubled?
- a. 2 dB
- b. 3 dB
- c. 6 dB
- d. 4 dB
79. A term which is subjected but dependent mainly on frequency and also affected by intensity,
- a. Timbre
- b. Quality
- c. Frequency
- d. Pitch
80. An effect that occurs in the ear where a louder sound can reduce or even stop the nerve voltage generated by a weaker sound.
- a. Piezoelectric effect
- b. Skin effect
- c. Lasing
- d. Masking
81. For computation of ideal reverberation time, which formula is applicable?
- a. Sabine
- b. Stephen and Bate
- c. Norris-Eyring
- d. Notch
82. The __________ of the sound is a subjective effect which is a function of the ear and brain.
- a. Pitch
- b. Frequency
- c. Timbre
- d. Loudness
83. Define as the time taken from the intensity of sound energy in the room to drop to one millionth of its initial value.
- a. Reverberation time
- b. Transit time
- c. Decaying time
- d. Response time
84. __________ is the sound energy per unit area at right angles of the propagation direction, per unit time.
- a. Loudness
- b. Coherence
- c. Sound stress
- d. Sound intensity
85. One octave above 600 Hz is
- a. 601 Hz
- b. 800 Hz
- c. 1400 Hz
- d. 1200 Hz
86. A car horn outdoors produces a sound intensity level of 90 dB at 10 m away. At this distance, what is the sound power in watt?
- a. 0.63
- b. 1.26
- c. 0.315
- d. 0.56 x 10-6
87. The unit of loudness level
- a. Sone
- b. dB
- c. Mel
- d. Phon
88. Consist of a rapid succession of noticeable echoes.
- a. Rarefaction
- b. Refraction
- c. Reflection
- d. Flutter echo
89. Laid the foundations of acoustic theory of buildings.
- a. Charles H. Townes
- b. W.C Sabine
- c. A. Javin
- d. Stephen and Bate
90. An aural sensation by pressure variations in the air which are always produced by some source of vibrations.
- a. Music
- b. Sound
- c. Disturbance
- d. Speech
91. Considered to be the threshold of hearing.
- a. 10-12 W/cm2
- b. 10-16 W/m2
- c. 10-13 W/m2
- d. 10-12 W/m2
92. The average absorption for a person is
- a. 5.7 units
- b. 4.7 units
- c. 6.7 units
- d. 3.7 units
93. The number of vibration or pressure fluctuations per seconds.
- a. Frequency
- b. Timbre
- c. Quality
- d. Pitch
94. Defined as the average rate of transmission of sound energy in a given direction through a cross-sectional area of 1 m2 at right angles to the direction.
- a. Sound pressure
- b. Loudness
- c. Sound intensity
- d. Pressure variation
95. What is the sound pressure level (SPL) of a sound having a RMS pressure of 200 N/m2?
- a. 150 dB
- b. 140 dB
- c. 170 dB
- d. 160 dB
96. The minimum sound intensity that can be heard is termed
- a. Threshold of feeling
- b. Threshold of pain
- c. Threshold of sensation
- d. Threshold of hearing
97. What is the intensity of the sound whose RMS pressure is 200 N/m2?
98. The unit of pitch.
- a. sone
- b. pitch
- c. dB
- d. Mel
99. What is the increase in sound pressure level in dB, if the intensity is doubled?
- a. 2 dB
- b. 3 dB
- c. 4 dB
- d. 6 dB
100. The velocity of sound is considered to be constant at ________ for the purpose of acoustics.
- a. 300 m/s
- b. 330 mm/s
- c. 330 µm/s
- d. 330 cm/s
Post a Comment
EmoticonClick to see the code!
To insert emoticon you must added at least one space before the code.