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Acoustics Design Practicum MCQ

What is wavelength?

The sum of two different positions in the cycle or wave.

The distance between two different positions in the cycle or wave.

The sum of two identical positions in the cycle or wave.

The distance between two identical positions in the cycle or wave.

Answer

Correct Answer: The distance between two identical positions in the cycle or wave.

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What influences reverberation time?

Height

Volume

Length

Width

Answer

Correct Answer: Volume

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What is a vibration isolator?

A resilient support that tends to isolate a mechanical system from steady state excitation.

A device that amplifies vibrations

A device that cancels out vibrations

A device that measures vibrations

Answer

Correct Answer: A resilient support that tends to isolate a mechanical system from steady state excitation.

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What is the number of oscillations which occurs in one second called?

Minutes

Seconds

Hours

Hertz (Hz)

Answer

Correct Answer: Hertz (Hz)

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What does the amplitude of a vibration represent?

The number of times the force oscillates

The time period

The direction of the force

The magnitude or distance of travel of the force

Answer

Correct Answer: The magnitude or distance of travel of the force

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What is the name of the frequency region that contains Ultrasounds?

Audible region

Infrasonic region

Hypersonic region

Ultrasonic region

Answer

Correct Answer: Ultrasonic region

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How long does a constant sound level have to last in order to be equal to the TWA?

16 hours

4 hours

2 hours

8 hours

Answer

Correct Answer: 8 hours

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What does TWA stand for?

Twice Worked Average

Total Work Average

Time Worked Average

Time Weighted Average

Answer

Correct Answer: Time Weighted Average

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What does the SMOKE DEVELOPED INDEX classification relate to?

The speed at which smoke from a fire will travel.

A comparison of smoke development of a particular material compared to concrete panels and red oak.

A measure of the density of smoke produced by a burning material.

A measure of the toxicity of the smoke produced by a burning material.

Answer

Correct Answer: A comparison of smoke development of a particular material compared to concrete panels and red oak.

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What is the sound level at the listener's ear of a speaker above the background noise level?

15 to 20 dB

Signal to Noise Ratio

Inverse square law

Answer

Correct Answer: Signal to Noise Ratio

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What is a SEPTUM?

A device that helps you hear better

A thin layer of material between 2 layers of absorptive material

A sound-proof room

The membrane that separates the nasal cavity

Answer

Correct Answer: A thin layer of material between 2 layers of absorptive material

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What is the purpose of a Septum?

To create sound waves

To prevent sound waves from piercing through absorptive material.

To allow sound waves to pass through absorbent material

To absorb sound waves

Answer

Correct Answer: To prevent sound waves from piercing through absorptive material.

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What unit is the Sabine Formula stated in?

Absorption

Seconds

Square footage

Cubic feet

Answer

Correct Answer: Seconds

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What is the Sabine formula?

A formula for calculating the volume of a room

A formula for calculating reverberation time in a room

A formula for calculating the size of a room

A formula for calculating the amount of absorption needed in a room

Answer

Correct Answer: A formula for calculating reverberation time in a room

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What unit is SABIN?

Unit of loudness

Unit of pitch

Measure of sound pressure

Unit of sound absorption

Answer

Correct Answer: Unit of sound absorption

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What unit of sound absorption is a Sabin?

One square foot of material

The amount of material used and its absorption coefficients

One cubic foot of material

The standard range of frequencies 125-4000 Hz

Answer

Correct Answer: One square foot of material

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What is the term for when sound continues to reflect off surfaces after the sound has ended at the source?

Diffraction

Refraction

Reverberation

Interference

Answer

Correct Answer: Reverberation

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What is the basic acoustical property of a room which depends only on its dimensions and the absorptive properties of its surfaces and contents?

Sound reflection

Echo

Reverberation time

Reverberation

Answer

Correct Answer: Reverberation time

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Reverberation time is the basic acoustical property of a room which depends only on its:

Sound frequency

Reverberation level

Dimensions and the absorptive properties of its surfaces and contents

Time of day

Answer

Correct Answer: Dimensions and the absorptive properties of its surfaces and contents

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What is RESONANCE?

A range of frequencies

The pitch of a sound

The loudness of a sound

The emphasis of sound at a particular frequency.

Answer

Correct Answer: The emphasis of sound at a particular frequency.

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What is the definition of REFLECTION?

The amount of sound wave energy (sound) that is reflected off a surface

A sound wave with a short wavelength

The amount of sound wave energy (sound) that is absorbed by a surface

The amount of sound wave energy (sound) that is transmitted through a surface

Answer

Correct Answer: The amount of sound wave energy (sound) that is reflected off a surface

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What is the definition of reflection in relation to sound waves?

The amount of sound wave energy (sound) that is transmitted through a surface.

The amount of sound wave energy (sound) that is refracted by a surface.

The amount of sound wave energy (sound) that is absorbed by a surface.

The amount of sound wave energy (sound) that is reflected off a surface.

Answer

Correct Answer: The amount of sound wave energy (sound) that is reflected off a surface.

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What is the loss of hearing due primarily to the aging process called?

Otopyorrhea

Otitis

Audiodynia

Presbycusis

Answer

Correct Answer: Presbycusis

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What is Presbycusis?

The loss of hearing due primarily to the aging process.

The loss of hearing due to a loud noise

The loss hearing due to earwax buildup

The loss of hearing due to a cold

Answer

Correct Answer: The loss of hearing due primarily to the aging process.

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What is PITCH?

The wavelength of sound waves

The loudness of sound waves

Perceived auditory sensation of sounds expressed in terms of high or low frequency stimulus of the sound.

The speed of sound waves

Answer

Correct Answer: Perceived auditory sensation of sounds expressed in terms of high or low frequency stimulus of the sound.

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What does pitch refer to?

The perceived auditory sensation of sounds expressed in terms of high or low frequency stimulus of the sound.

The loudness of a sound

The rate of vibration of a sound-producing body

The highness or lowness of a tone

Answer

Correct Answer: The perceived auditory sensation of sounds expressed in terms of high or low frequency stimulus of the sound.

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What is the unit of PHON?

Sone

Answer

Correct Answer: DB

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What is PHON?

Loudness contours. A subjective impression of equal loudness by listeners as a function of frequency and sound level (dB).

The study of the physical characteristics of the atmosphere

The study of the production, perception, and properties of speech

The study of the behavior and interactions of particles that make up matter

Answer

Correct Answer: Loudness contours. A subjective impression of equal loudness by listeners as a function of frequency and sound level (dB).

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What is the meaning of the word "OTOLARYNGOLOGIST"?

A device used to clean the ear

A doctor specializing in disorders and treatment of the ear nose and throat disorders.

A doctor who treats diseases of the eye

A disease of the ear

Answer

Correct Answer: A doctor specializing in disorders and treatment of the ear nose and throat disorders.

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What does an Otolaryngologist treat?

Skin disorders.

Ear, nose and throat disorders.

Brain disorders.

Heart disorders.

Answer

Correct Answer: Ear, nose and throat disorders.

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What is the full form of ENT?

Ear, Nose and Throat

Every Needle Thoroughly

Equal Noises Today

Over the Line

Answer

Correct Answer: Ear, Nose and Throat

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What is the study of the ear called?

Orthopedics

Otology

Ophthalmology

Optometry

Answer

Correct Answer: Otology

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What is the center frequency for the 10th octave band?

4000 Hz

63 Hz

125 Hz

31.5 Hz

Answer

Correct Answer: 4000 Hz

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What is the center frequency of the third octave band?

250

125

31.5

Answer

Correct Answer: 125

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How is the level of sound reduced when introducing sound absorbing materials?

Logarithmic basis

Geometric basis

Not at all

Arithmetic basis

Answer

Correct Answer: Logarithmic basis

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What is the level of sound reduced on a logarithmic basis?

Minutes

Hours

Seconds

Decibels

Answer

Correct Answer: Decibels

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What does NNIC stand for?

Noise New Ireland Class

Normalized Noise Isolation Class

Normalized Noise Reduction Class

Noise Noise Isolation Class

Answer

Correct Answer: Normalized Noise Isolation Class

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Which of the following rating methods has replaced NIC?

Articulation Index (AI) rating method

Noise Reduction Coefficient (NRC) rating method

Noise Isolation Coefficient (NIC) rating method

Articulation Class (AC) rating method

Answer

Correct Answer: Articulation Class (AC) rating method

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What do noise criteria curves do?

Evaluate existing listening conditions at ear level by measuring sound levels at loudest locations in a room.

Measure the intensity of a noise

Tell you how far away a noise is

Predict how loud a noise will be

Answer

Correct Answer: Evaluate existing listening conditions at ear level by measuring sound levels at loudest locations in a room.

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What is the reference unit for Noise Criteria?

DBA

Sone

Answer

Correct Answer: DBA

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What is noise?

Vibrations in the air

A series of sounds

Sound that only occurs in certain places

Unwanted sound that is annoying or interferes with listening.

Answer

Correct Answer: Unwanted sound that is annoying or interferes with listening.

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What does MOUNTING represent?

The ability to produce air space

The way a specimen is attached to the test room surface

A way to test the strength of a material

Standards established by ASTM to represent typical installation for the purpose of testing materials

Answer

Correct Answer: Standards established by ASTM to represent typical installation for the purpose of testing materials

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What is the MASS of a material?

The length of time required for sound waves to travel through a material.

The fundamental property of a material relevant to sound transmission loss through that material.

The amount of sound a material can absorb.

The amount of sound pressure required to cause a material to fracture.

Answer

Correct Answer: The fundamental property of a material relevant to sound transmission loss through that material.

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What is the term for the process by which the threshold of hearing of one sound is raised due to the presence of another?

Oligosaccharide

Lipopolysaccharide

Masking

Mesosaccharide

Answer

Correct Answer: Masking

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What is masking?

The process by which the threshold of hearing of one sound is raised due to the presence of another.

The process by which the threshold of hearing of one sound is not affected by the presence of another.

The process by which the threshold of hearing of one sound is amplified by the presence of another.

The process by which the threshold of hearing of one sound is lowered due to the presence of another.

Answer

Correct Answer: The process by which the threshold of hearing of one sound is raised due to the presence of another.

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What is an acoustical treatment plan for rooms called LIVE END/ DEAD END?

One end is highly absorbent and the other end is diffusive.

One end is highly absorbent and the other end is reflective.

One end is highly absorbent and the other end is reflective and diffusive.

Both ends are highly absorbent.

Answer

Correct Answer: One end is highly absorbent and the other end is reflective and diffusive.

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What is the other end in LIVE END/ DEAD END rooms?

End

Live

Dead

Reflective and diffusive

Answer

Correct Answer: Reflective and diffusive

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What is the INVERSE SQUARE LAW?

Sound level drops off 12 dB from source point for every doubling of distance.

Sound level drops off 3 dB from source point for every doubling of distance.

Sound level drops off 6 dB from source point for every doubling of distance.

Sound level rises off 6 dB from source point for every doubling of distance.

Answer

Correct Answer: Sound level drops off 6 dB from source point for every doubling of distance.

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How many dB does the sound level drop off for every doubling of distance?

3 dB

9 dB

6 dB

12 dB

Answer

Correct Answer: 6 dB

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What does INTENSITY represent?

The root square of the mean level over a given period of time

The average level over a given period of time

The instantaneous level over a given period of time

The mean root square of the instantaneous level over a given period of time

Answer

Correct Answer: The mean root square of the instantaneous level over a given period of time

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What is the formula for INTENSITY?

The mean square of the instantaneous level over a given period of time.

The root mean square of the instantaneous level over a given period of time.

The mean root square of the level over a given period of time.

The mean root square of the instantaneous level over a given period of time.

Answer

Correct Answer: The mean root square of the instantaneous level over a given period of time.

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What is the sound produced by the collision of two solid objects called?

IMPACT SOUND

INTERSECTION SOUND

ASYMPTOTE SOUND

HARDWARE SOUND

Answer

Correct Answer: IMPACT SOUND

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What is the typical source of impact sound?

Animals

Footsteps, dropped objects, etc., on an interior surface of a building.

Weather

Exterior surfaces

Answer

Correct Answer: Footsteps, dropped objects, etc., on an interior surface of a building.

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The sound pressure levels generated by the "Standard Tapping Machine" are measured by what?

An automated device

A computer

A manual operator

An electrically operated mechanism

Answer

Correct Answer: An electrically operated mechanism

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The sound pressure levels generated by the Standard Tapping Machine are normalized according to what?

The frequency of the impacts

The size of the Standard Tapping Machine

The weight of the hammers

The room directly below the floor/ceiling assembly undergoing testing

Answer

Correct Answer: The room directly below the floor/ceiling assembly undergoing testing

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The methods to measure the degree of impact noise isolation in laboratory conditions are described in which standards?

ASTM E 492 or ISO 140/6

ASTM E 1007 or ISO 140/7

ASTM E 492

ISO 140/6

Answer

Correct Answer: ASTM E 492 or ISO 140/6

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Which standard describes the methods to measure the degree of impact noise isolation provided by a floor/ceiling assembly in laboratory conditions?

ASTM E 1007

ISO 140/6

ASTM E 492

ISO 140/7

Answer

Correct Answer: ASTM E 492

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What does HERTZ measure?

The pitch of sound

Frequency of sound expressed by cycles per second

The loudness of sound

The duration of sound

Answer

Correct Answer: Frequency of sound expressed by cycles per second

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What does HERTZ express?

The duration of one complete cycle of a waveform as measured from a fixed point.

The rate of oscillation of the electrons in an atom.

Frequency of sound expressed by cycles per second.

The number of sound waves produced in one second.

Answer

Correct Answer: Frequency of sound expressed by cycles per second.

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What is hearing impairment?

Deafness

A hearing loss of a slight degree

A hearing loss of a mild, moderate, or severe degree

A hearing loss of a profound degree

Answer

Correct Answer: A hearing loss of a mild, moderate, or severe degree

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How many people in the USA are affected by hearing loss?

5-25 million

2.5 million

250 million

25-50 million

Answer

Correct Answer: 25-50 million

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Which unit is used to measure acoustical frequency?

Hertz

Hours

Seconds

Minutes

Answer

Correct Answer: Hertz

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What is a free field?

A sound source indoors with no obstructions

A sound source indoors with obstructions

A sound source outdoors with obstructions

A sound source outdoors with no obstructions

Answer

Correct Answer: A sound source outdoors with no obstructions

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What is FOOTFALL?

The act of stepping on someone's foot

A type of fabric

A measure of the number of times a foot hits the ground while walking

A form of impact noise that occurs when feet come into contact with a floor.

Answer

Correct Answer: A form of impact noise that occurs when feet come into contact with a floor.

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FLOORIMPACT is another name for what?

Floor Protection

Floor Damage

Footfall

Flooring

Answer

Correct Answer: Footfall

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Which of the following is not a difference between field conditions and laboratory conditions that affects the FSTC rating?

Modal distribution

Flanking paths

Size of the room

Absorption

Answer

Correct Answer: Modal distribution

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What is the term for a professional with an engineering degree who is experienced in providing advice on acoustical requirements and noise control?

Industrial Designer

Environmental Consultant

Architectural Designer

Acoustical Consultant

Answer

Correct Answer: Acoustical Consultant

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What are the two most common types of accelerometers?

The traditional force type and the integrated electronic capacitive type.

The traditional charge type and the integrated electronic capacitive type.

The traditional force type and the integrated electronic piezoelectric type.

The traditional charge type and the integrated electronic piezoelectric type.

Answer

Correct Answer: The traditional charge type and the integrated electronic piezoelectric type.

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What does the term "acoustics" mean?

The study of light

The study of color

The study of sound

The study of motion

Answer

Correct Answer: The study of sound

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What is audio terminology?

The study of vibration and wave motion in gases, liquids, and solids

The study of hearing

Common phrases found in the science of sound, acoustics.

The art of producing beautiful music

Answer

Correct Answer: Common phrases found in the science of sound, acoustics.

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What is the definition of sound?

A particular quality of a musical note, noise, or voice

Vibrations of air, water, or other medium that are transmitted to the ear and produce the sensation of hearing.

The action or process of producing a musical note or other sound.

Sound waves are pressure waves that travel throughout the Earth's atmosphere.

Answer

Correct Answer: Sound waves are pressure waves that travel throughout the Earth's atmosphere.

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What is the best way to learn about acoustics?

By playing video games

By reading a glossary of terms

By listening to music

By watching movies

Answer

Correct Answer: By reading a glossary of terms

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What is the FLAME SPREAD?

Propagation of flame across a sample compared to flame propagation across concrete panels and red oak

The speed at which a fire spreads

The rate at which a fire burns

A measure of heat conduction

Answer

Correct Answer: Propagation of flame across a sample compared to flame propagation across concrete panels and red oak

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What is FLAME SPREAD?

A device used to extinguish fires

Classification indicating propagation of flame across a sample compared to flame propagation across concrete panels and red oak.

The process of combustion

The rate at which a fire burns

Answer

Correct Answer: Classification indicating propagation of flame across a sample compared to flame propagation across concrete panels and red oak.

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What is the effective level?

The root mean square of the instantaneous level over a given period of time.

The highest value in a cycle.

The mean square of the signal values.

The square root of the signal power.

Answer

Correct Answer: The root mean square of the instantaneous level over a given period of time.

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What sound do flutter echoes produce after the original sound signal has ceased?

A long echo

No sound

A clicking, ringing, or hissing sound

A faint echo

Answer

Correct Answer: A clicking, ringing, or hissing sound

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What is the definition of an echo?

A decibel level over 85 of sustained noise

The repetition of a sound by reflection

Reflected sound producing a distinct repetition of the original sound

A surge of electrical activity in the brain

Answer

Correct Answer: Reflected sound producing a distinct repetition of the original sound

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What is a good indicator of speech clarity?

A short EDT

A short RT60

A long EDT

A long RT60

Answer

Correct Answer: A short EDT

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What does EAR stand for?

Electronic Amplifying Receiver

Equalizing Amplifying Receiver

Edison Amplifying Receiver

Ear, Nose, and Throat

Answer

Correct Answer: Ear, Nose, and Throat

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What consists of outer, middle and inner ear segments that cause sound pressures to be picked up by the ear?

Mouth

Nose

Throat

EAR

Answer

Correct Answer: EAR

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What is the definition of DIFFUSION?

The process of making a sound louder

The quality of a sound

The ability to hear sounds

The scattering or random reflection of a sound wave from a surface.

Answer

Correct Answer: The scattering or random reflection of a sound wave from a surface.

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What does DEAF stand for?

Loss of auditory sensation

Loss of hearing

Assistive Listening Device

Hearing Impaired

Answer

Correct Answer: Loss of auditory sensation

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What is the full form of DEAF?

Deafness Education, Advocacy, and Support Foundation

Developmentally Exceptional and Able-bodied Future

Delta Epsilon Alpha Fraternity

Dual Enrollment and Accelerated Framework

Answer

Correct Answer: Deafness Education, Advocacy, and Support Foundation

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What is the definition of "deflection"?

A change in speed

A change in direction

The distance an elastic body or spring moves when subjected to a static or dynamic force.

A change in momentum

Answer

Correct Answer: The distance an elastic body or spring moves when subjected to a static or dynamic force.

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What is the dissipation of vibratory energy in solid media and structures with time or distance called?

Vibration

Damping

Sound

Wave motion

Answer

Correct Answer: Damping

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What is the definition of "damping"?

The movement of water molecules in a liquid

The dissipation of vibratory energy in solid media and structures with time or distance.

The movement of air molecules in a gas

The bouncing of a ball on a solid surface

Answer

Correct Answer: The dissipation of vibratory energy in solid media and structures with time or distance.

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How many oscillations occur in one second?

Three

One

Two

The number of oscillations that occur in the time frame of one second.

Answer

Correct Answer: The number of oscillations that occur in the time frame of one second.

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What is the complete oscillation of pressure above and below the atmospheric static pressure called?

Amplitude

Sine wave

Cycle

Hertz

Answer

Correct Answer: Cycle

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What is the cycle in acoustics?

The maximum value in an oscillation

The complete oscillation of pressure above and below the atmospheric static pressure.

The loudness of a noise

The average of sound pressure levels over a given time interval

Answer

Correct Answer: The complete oscillation of pressure above and below the atmospheric static pressure.

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What is the basilar membrane?

A membrane in the inner ear that vibrates to aid in frequency recognition.

A membrane in the ear that helps to produce sound.

A membrane in the eye that helps to protect it.

A membrane in the nose that helps to filter air.

Answer

Correct Answer: A membrane in the inner ear that vibrates to aid in frequency recognition.

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The cocktail party effect is the name for:

A party where cocktails are served

A sound that decreases in intensity as it travels

Sound in a noisy crowded room generated mostly by conversation

The ringing in your ears after a loud concert

Answer

Correct Answer: Sound in a noisy crowded room generated mostly by conversation

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What is the meaning of CLOUD in acoustical industry terms?

A group of interconnected computers

A large white mass of very small water droplets in the atmosphere

An acoustical panel suspended in a horizontal position from the ceiling/roof structure.

To make something obscure or covered

Answer

Correct Answer: An acoustical panel suspended in a horizontal position from the ceiling/roof structure.

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What is the difference between a cloud and a baffle?

A cloud is a horizontal acoustical panel while a baffle is vertical.

There is no difference between a cloud and a baffle.

A cloud is a soundproofing material while a baffle is an acoustical panel.

A cloud is an acoustical panel while a baffle is a soundproofing material.

Answer

Correct Answer: A cloud is a horizontal acoustical panel while a baffle is vertical.

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What is BOOMINESS?

An uncontrolled amount of bass in the sound reproduced by a loudspeaker.

The quality of being fun or enjoyable.

A small explosion

The boolean AND operation between two logical values

Answer

Correct Answer: An uncontrolled amount of bass in the sound reproduced by a loudspeaker.

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What does BEL stand for?

Bell Estates Limited

British Empire League

Beast of the East Lake

A measurement of sound intensity named in honor of Alexander Graham Bell

Answer

Correct Answer: A measurement of sound intensity named in honor of Alexander Graham Bell

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For what was the measurement of sound intensity BEL named?

Alexander Graham Bell

British Experimental Land design project

Belgravia

French unit of measurement

Answer

Correct Answer: Alexander Graham Bell

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What does the acronym "BARRIER" stand for?

British Association for Removal of difficulties in Relating to Elocution and Reading

Best Acoustics for Royalty in England and Russia

Anything physical or an environment that interferes with communication or listening.

Bureau of Accurate Records Regarding International Events and Newspapers.

Answer

Correct Answer: Anything physical or an environment that interferes with communication or listening.

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What does "BAFFLE" stand for?

Free-hanging acoustical unit

A free-hanging acoustical sound absorbing unit

Sound unit

Acoustical sound unit

Answer

Correct Answer: A free-hanging acoustical sound absorbing unit

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What doesBACKGROUND NOISE represent?

Good listening

Speech intelligibility

Hearing-impaired persons

The sum total of all noise generated from all direct and reflected sound sources in a space

Answer

Correct Answer: The sum total of all noise generated from all direct and reflected sound sources in a space

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What is an acoustic calibrator?

A device used to measure the amplitude of sound waves.

An instrument providing a reference noise source used to calibrate the performance of sound level meters.

A device used to measure the wavelength of sound waves.

A device used to measure the frequency of sound waves.

Answer

Correct Answer: An instrument providing a reference noise source used to calibrate the performance of sound level meters.

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What does the word "acoustical" mean?

The study of acoustics

The study of sound

The properties of a material to absorb or reflect sound

The study of music

Answer

Correct Answer: The properties of a material to absorb or reflect sound

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What is the name of the organization that publishes standards and information related to the study and applications of acoustics?

American Institute of Physics (AIP)

Optical Society of America (OSA)

ACOUSTICAL SOCIETY OF AMERICA (ASA)

American Physical Society (APS)

Answer

Correct Answer: ACOUSTICAL SOCIETY OF AMERICA (ASA)

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What is the Acoustical Society of America?

A method of soundproofing

An organization that publishes standards and information related to the study and applications of acoustics.

A device that amplifies sound

A recording studio

Answer

Correct Answer: An organization that publishes standards and information related to the study and applications of acoustics.

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What does an accelerometer measure?

Vibration

Distance

Speed

Time

Answer

Correct Answer: Vibration

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What is the branch of physics that studies the production, transmission, control, and effects of sound?

Neurology

Acoustics

Cardiology

Radiology

Answer

Correct Answer: Acoustics

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More Acoustical Engineering Subjects

Architectural Acoustics

Noise & Vibration Control

Sound Insulation

Environmental Acoustics

Measurement of Noise

Ear Anatomy

Basic Audiology

Microphones

Acoustic modelling software

Acoustical Modeling

Noise Control

Audio Visual System Design

Acoustical and Audio Measurements

Electroacoustics

Psychoacoustics

Musical Acoustics

More Resources

Acoustical Engineering Skill Assessment

Acoustical Engineering PDF

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