Acoustical and Audio Measurements MCQs
Acoustical and Audio Measurements MCQs
Answer these Acoustical and Audio Measurements MCQs and assess your grip on the subject of Acoustical and Audio Measurements.
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1: What is the unit of measurement for sound absorption?
A. Pascal
B. Sabin
C. Hertz
D. Decibel
2: What portion of energy is absorbed when a sound wave strikes a material?
A. The material the sound wave is hitting
B. The sound wave itself
C. The absorption coefficient of the material
D. The frequency of the sound wave
3: What is acoustical tile most absorptive of?
A. High frequencies
B. All frequencies
C. Low frequencies
D. Medium frequencies
4: What is the science of the production, control, transmission, reception and effects of sound and the phenomenon of hearing?
A. The study of human hearing
B. Acoustics
C. The study of music
D. The study of human speech
5: What is Ambience?
A. The study of ancient languages.
B. The act of ringing a church bell.
C. A city in Texas.
D. The residual "room sound" of a listening environment.
6: What is ambient noise?
A. All pervasive noise associated with a given environment.
B. The right kind of noise to fall asleep to
C. A type of white noise
D. A measure of the loudness of sounds
7: What does the word "Analog" mean?
A. A device used to measure electrical signals
B. Process of changing sound into digital form
C. Digital
D. Analog representations of sound replicate its waveform, while transferring it through different media.
8: What does the word "Anechoic" mean?
A. "Loud"
B. "Without echo"
C. "Soft"
D. "Echoing"
9: What does diffraction of sound energy around perimeters cause?
A. Exposed edges
B. Gaps in acoustical materials
C. Anechoic wedge
D. Spaced apart acoustical materials
10: What is the primary reason for spacing acoustical materials apart?
A. To allow for diffusion of sound energy
B. To reduce sound energy
C. To increase the total surface area
D. To create an area of effect for greater absorption
11: What is the ambient noise level above which signals must be presented or noise sources measured?
A. Background noise
B. Weighting filter
C. Signal-to-noise ratio
D. Threshold noise
12: What does background noise refer to?
A. The amount of noise that a particular device or system makes
B. The ambient noise level above which signals must be presented or noise sources measured.
C. The lowest noise level that can be detected by the human ear
D. The level of noise that is considered acceptable in a given environment
13: What is the primary purpose of a baffle?
A. To reduce reverberation time.
B. To produce sound waves.
C. To increase reverberation time.
D. To absorb sound waves.
14: What is a barrier?
A. A structure built to keep animals in a particular area
B. A place where two roads meet
C. A device used to control water
D. Heavy, dense and massive material used to block sound.
15: What is the main purpose of a bass trap?
A. To absorb low frequency waves
B. To cancel low frequency waves
C. To project low frequency waves
D. To reflect low frequency waves
16: What does Block mean?
A. None of the above.
B. To create a barrier against sound.
C. To increase airborne sound transmission.
D. To reduce airborne sound transmission.
17: What does the term "boomy" usually refer to?
A. No frequency energy
B. High frequency (treble) energy
C. An excessive amount of low frequency (bass) energy
D. Moderate frequency energy
18: What is destructive interference?
A. The constructive interference of two or more sound waves.
B. The reinforcement of two or more sound waves.
C. The attenuation of two or more sound waves.
D. The destructive interference of two or more sound waves.
19: What is the destructive interference of two or more sound waves called?
A. Diffraction
B. Cancellation
C. Reflection
D. Addition
20: What is the acronym for Ceiling Attenuation Class?
A. CLAC
B. CC
C. CAC
D. CSTC
21: What is a Ceiling Cloud?
A. A type of acoustic guitar
B. A cloud that forms on the ceiling
C. An acoustical panel suspended in a horizontal position from ceiling or roof structure.
D. A sound-proofing method for ceilings
22: What is the result of combining an acoustical signal with a delayed replica of itself?
A. Offset in time
B. Smooth curve
C. Constructive and destructive interference
D. Teeth linear frequency scale
23: What does a comb filter do to an acoustical signal?
A. Produces distortion
B. Equalizes the sound
C. Makes the signal louder
D. Clear the noise
24: The ability to focus on a single talker in a cocktail party is due to the Brain's ____________
A. Unintelligible evidence
B. Discrimination of unwanted sound
C. Inability to focus
D. Lip reading
25: The Cocktail Party Effect is the ability to focus on one talker among a mixture of crowd conversations and background noise.
A. False
B. True
26: What is the "D" in "D-Ring" refer to?
A. The letter in the alphabet that comes before "E"
B. The shape of the ring
C. The first letter in the alphabet
D. The letter in the alphabet that comes after "C"
27: What is Damping?
A. The sudden stop of a vibration system
B. A measure of the stiffness of a spring
C. The loss of energy in a vibration system, usually through friction.
D. The gain of energy in a vibration system
28: What is the loss of energy in a vibration system called?
A. Authentication
B. Diffusion
C. Refraction
D. Damping
29: What is dead?
A. The end of life
B. An acoustical condition in which reverberation is absent
C. A state of being unconscious
D. A lack of movement or energy
30: What is the decay time of a room at a specific frequency?
A. The time necessary for a sound of that frequency to decay 90 dB.
B. The time necessary for a sound of that frequency to decay 30 dB.
C. The time necessary for a sound of that frequency to decay 60 dB.
D. The length of time taken for a signal to drop in strength to its initial value.
31: What is the measuring unit of sound pressure?
A. Newton (N)
B. Pascal (Pa)
C. Decibel (dB)
D. Joule (J)
32: What is the decibel?
A. The measuring unit of distance
B. The measuring unit of speed
C. The measuring unit of sound pressure
D. The measuring unit of frequency
33: What is the term for reflected energy that occurs in close proximity to the source?
A. Late reflection
B. Reverberation
C. Echo
D. Early reflection
34: What is the quarter-inch bevel also known as?
A. Beveled
B. Chamfered
C. Eased
D. Edge-Lit
35: What is an eased edge?
A. A method of printing that uses a curved plate to transfer an image to paper.
B. An Old English verb meaning “to make (something) free from entanglements or difficulties.”
C. An acoustical panel edge detail also known as a quarter-inch (¼") bevel.
36: What is the definition of an "echo"?
A. A distinctly discernible reflection, or repetition of a source signal.
B. Indistinguishable reflections
C. Densely spaced reflections
D. Reverberation
37: Which of the following best describes Equal Loudness Contours?
A. The average of two sound frequencies
B. A set of curves of equivalent loudness, which model the ear’s frequency response throughout the audible spectrum.
C. The difference in loudness between two sounds
D. The loudness of two identical sounds
38: Which of the following is not a simple form of equalization?
A. Equalizing
B. Tone controls
C. Boosting
D. Attenuating
39: Equalization is the adjustment of what?
A. Volume
B. Tone
C. Tempo
D. Timbre
40: What is the main difference between near field and far field?
A. Amount of acoustic energy
B. Direction of the energy
C. Linear dimensions of the source
D. Distance from the source
41: What is the Flame Spread Index of red oak?
A. 25
B. 50
C. 75
D. 100
42: Flanking occurs when a free standing partition size is ____ than the wavelength of sound to be blocked.
A. Less
B. None of the above
C. Greater
D. Equal
43: What is the term used to describe an even frequency response in which no frequency is accentuated?
A. Diffuse
B. Flat
C. Frequency
D. Rich
44: What does the term "flat" describe in relation to frequency response?
A. A frequency response with a lot of treble
B. An even frequency response in which no frequency is accentuated.
C. A uneven frequency response
D. A frequency response with a lot of bass
45: What are the Fletcher-Munson curves?
A. The range of human hearing in hertz.
B. The decibel scale for rating the loudness of sounds.
C. The range of human hearing in decibels.
D. The equal loudness contours plotted by the researchers Fletcher and Munson.
46: What is the use of a Gobo?
A. To add echo
B. Prevent microphone leakage between two instruments
C. To boost sound
D. To clean up recordings
47: What is the principle used to achieve diffraction of acoustical waves?
A. Diffraction
B. Reflection
C. Refraction
D. Grating
48: What does an acoustical diffraction grating do?
A. Produce diffusion of sound
B. Transmit sound
C. Produce reflection of sound
D. Absorb sound
49: What is an acoustical diffraction grating?
A. A device to produce diffraction of sound
B. A device to produce diffusion of sound
C. A device to produce refraction of sound
D. A device to produce reflection of sound
50: What is the Grazing Effect?
A. The way in which sound is echoed by the audience
B. The way in which sound is amplified by the audience
C. The way in which light is absorbed by the audience
D. The way in which sound is absorbed by the audience
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Acoustical and Audio Measurements MCQs
