36 Questions
What can be used to reduce noise impinging on a building without resorting to costly sound insulation?
Earth embankment
What type of structures act as sound absorbers and reflectors?
Hedges of trees with dense foliage
Where is it advantageous to place the speakers platform in a building?
At the end of the room adjacent to the street
What is the science of converting acoustical energy into another form of energy?
Noise reduction
Which part of a building layout has a bearing on noise control?
Location of doors and windows
What type of construction can help in noise reduction through absorption?
Cavity Walls
What aspect of hedges contributes to their effectiveness as sound absorbers and reflectors?
Thickness, height, and density of growth
What is the purpose of a sound reinforcement system?
To amplify the original sound
In an ideal sound system, what should the frequency response be like?
It should be linear to retain original sound relation
What characteristic ensures that sound appears to come from the originating source?
Directivity
When might a sound system typically be required based on the text?
In spaces larger than 50,000 cu.ft. or 550 persons
Which of the following is NOT a basic element of all sound systems?
Lighting Systems
What are examples of input devices mentioned in the text?
Microphone, Phonograph, Cassette deck
Which component is responsible for boosting the input signal in a sound system?
Amplifier(s)
What is the principal mechanism through which sound is transmitted through a rigid partition?
Forced vibrations of the wall
Why does double-wall construction offer high insulation?
Cavity between walls
What are usually considered the paths of least resistance in sound insulation of a room?
Windows and doors
How can the average transmission loss of a window be primarily improved?
Increasing the thickness of the pane
What factor contributes to the increased transmission loss of a door?
Increased weight
According to the rule for noise insulation requirements, what should be added to the difference between outside noise level and acceptable noise level?
+10 db
What is the formula for determining the noise-insulation factor required for satisfactory noise insulation?
(Outside noise level - Acceptable noise level) + 10 db
Which construction method frequently offers high insulation at moderate cost?
Double-wall construction
What is the purpose of adding 10 dB in noise insulation?
To reduce the overall noise level
What is one of the beneficial effects of installing acoustical materials in a room?
Reducing the reverberation time
In what types of spaces are absorption techniques recommended?
Spaces with hard surfaces and little absorptive content
What is a characteristic of noise localization achieved by acoustical materials?
Attenuating nearby noise sources more than distant ones
Why are absorption techniques effective in certain spaces?
To change room reverberation characteristics
What is one reason for installing acoustical materials in offices?
To reduce the overall reverberation time
What is the speed of vibration through a solid building structure compared to sound in air?
Ten times faster than sound in air
Which of the following materials is recommended to reduce impact transmission to the floor?
Cork tile on felt
What is the primary source of solid-borne noise?
Impacts or machinery vibration
What is the purpose of using heavy carpeting in sound reduction?
To reduce impact transmission to the floor
Which of the following is NOT mentioned as a measure for solid-borne sound reduction?
Plastic piping
What does the table provide ratings for in terms of floor constructions?
Comparisons between various floor materials laid on a concrete slab
How does solid-borne noise typically travel through a building structure?
Faster than vibrations in air
Which material is not recommended in the text for reducing solid-borne noise transmission?
Thin plastic sheets
Test your knowledge on sound reinforcement systems, noise control, air-borne noise reduction, solid-borne sound reduction, fundamentals of lighting, and daylighting. Explore components like input devices, amplifiers, controls, and loudspeakers.
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