| 1. |
Conversion of acoustic energy to heat energy or another form of energy within the medium of sound-absorbing materials is called ________________. |
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Absorption |
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Adsorption |
| 2. |
The most frequently encountered noise sources in a ducted air distribution system designed to deliver a constant volume of air are fans, control dampers, and air outlets such as diffusers, grilles, and registers. |
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True |
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False |
| 3. |
What does SIL stand for? |
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Speech Interference Levels |
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Speed Interactive Level |
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Speech Interference Load |
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None of the above |
| 4. |
Rain, mist, fog, hail, sleet, and snow are the various forms of _______________. |
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Precipitation |
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Temperature |
| 5. |
Felt strips or pads are effective for reducing structure borne sound transmission in the mounting of piping and vibrating conduit. |
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|
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True |
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False |
| 6. |
What does VAV stand for? |
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Variable Air Valves |
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Variety Air Valves |
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Variable Agency Valves |
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None of the above |
| 7. |
Ten times the common logarithm to the base 10 of the ratio of the mean square sound pressure to the square of a reference pressure is called Sound Power Level. |
|
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True |
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False |
| 8. |
________________ is defined as the number of cycles occurring per second. |
|
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Frequency |
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Wavelength |
| 9. |
The arithmetic average of several related sound levels (or SPL in a specified frequency band) measured at different positions or different times, or both are called Average Sound levels. |
|
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True |
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False |
| 10. |
What does ASHRAE stand for? |
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American Society of Heating, Refrigerating, and Air-Conditioning Engineers |
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American Standard of Heating, Refining, and Air-Conditioning Engineers |
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American Standard of Heating, Refrigerating, and Air-Conditioning Engineers |
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None of the above |
| 11. |
__________ is defined as a unit for expressing the relative power level difference between acoustical or electrical signals. |
|
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Decibel |
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Power |
| 12. |
Field Sound Transmission is the ratio of the airborne sound power incident on the partition to the sound power transmitted by the partition. |
|
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True |
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False |
| 13. |
What does ASTM stand for? |
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American Society for Testing and Materials |
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American Society for Transportation and Materials |
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American Standard for Testing and Materials |
|
|
None of the above |
| 14. |
________________ is the ratio of sound energy absorbed by the acoustical material to that absorbed by a perfect absorptive material. |
|
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Absorption coefficient |
|
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Noise coefficient |
| 15. |
What does FSTC stand for? |
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Field Sound Transmission Class |
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Field Standard Transmission Class |
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Field Sound Testing Class |
|
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None of the above |
| 16. |
A range of frequencies whose upper band limit frequency is nominally twice the lower band limit frequency is called _______________. |
|
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Octave Band |
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|
Noise Frequency |
| 17. |
What does HVAC stand for? |
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Heating, Ventilation and Air Conditioning |
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Heating, Variety and Air Conditioning |
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Heavy, Ventilation and Air Conditioning |
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None of the above |
| 18. |
Sound Transmission Loss is a measure of sound insulation provided by a structural configuration. |
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True |
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False |
| 19. |
A __________ is a solid structure that intercepts the direct sound path from a source to a receiver. |
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Barrier |
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Diffraction |
| 20. |
What does figure 5-9 illustrate about?
(Refer Pg 5-12) |
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Edge Effects at End of Barrier |
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Approximate Noise Reduction of Typical Exterior Wall Constructions |
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|
Sound Transmission |
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None of the above |
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