MCQ For Acoustics Glass Architecture [PDF]

Zitiervorschau

MCQ for ACOUSTICS in GLASS ARCHITECTURE

1. For a sound vibration to be audible to human beings the frequency must be from a. 10 to 10,000 Hertz b. 20 to 20,000 Hz c. 100 to 10,000 Hz d. 20 to 10,000 Hz 1.

The sound attenuation of any material depends or glass on its a.. Mass b. stiffness c. damping characteristics d. all of the above

3. Critical frequency for a glass thickness is a. Every glass pane thickness has a weak frequency for which that thickness of glass is less 'noise absorbent' than for the others. b. Every glass pane thickness has a weak frequency for which that thickness of glass is maximum 'noise absorbent' than for the others. c. Every glass pane thickness has a weak frequency for which that thickness of glass is maximum 'noise absorbent' than for the others. d. . Every glass pane thickness has a weak frequency for which that thickness of glass is not 'noise absorbent' 4.

Which statement is correct

a. At high frequencies sound attenuation is inversely proportional to mass b. At high frequencies sound attenuation is directly proportional to mass c. At low frequencies sound attenuation is directly proportional to mass d. . At low frequencies sound attenuation is inversely proportional to mass5. 5. The acoustic attenuation is most superior for the following a. monolithic 6mm-thick glass b. 6-12 -6 mm glass ( 6mm glass, 12 mm gap, 6mm glass)

c. double glazed 12-6-10 mm d. 6-200-6 double glazing 6. The unit of frequency of sound is a. Hertz (Hz). b. decibels (dB) c. metre/sec d. Pascals 7.Sound attenuation is more for a. Laminated glass of 8mm thick b. solid glass of 8 mm thick c. Double glass 4 mm and 4 mm with air gap 200m d. double glass with air gap 20 mm 8. When sound travels through air, the atmospheric pressure varies periodically a. compressions and rarefactions that constitute a sound wave b. The number of pressure variations per second is called the frequency of sound c. it is measured in Hertz (Hz) which is defined as the number of cycles per second. d. all of the above 9. Which statement is correct a. The higher the frequency, the more high-pitched a sound is perceived b. the audible sound has a frequency of between 200 Hz and 20,000 Hz. c. the bass range from 1250 to 2500 Hz d. Sounds produced by drums have much higher frequencies than those produced by a whistle. 10. Which statement is correct a Thin glass tends to provide greater sound reduction even though it may actually transmit more sound at some specific frequencies b. The sound attenuation of any material depends only on its mass, c. The sound transmission loss for a single glass pane, measured over a range of frequencies, varies depending on glass thickness

d. Noise - what we want to avoid inside our buildings - is the mixture of sounds of different quality

answers 1-b,2-d,3-a,4-c,5-d,6-b,7-c,8-d,9-a,10-d