[Assimilation Alex] Acoustics & Lighting (101-164)
Terms in this set (15)
A type of resonator made from empty clay vessels of different sizes. Their absorption ranges from 100-400 hertz.
Threshold of hearing
The rustling of leaves in breeze is said to be within the ____.
That sound travels in a vacuum
The following statements are true with regards to sound except
a. That sound is an aural sensation
b. That sound is caused by oscillation in an elastic medium
c. That sound travels in a vacuum
d. That sound is caused by the vibration of particles which move in
an infinitesimal amount causing particles to impart motion and
energy to them
All of the above
The velocity of sound is affected by _____.
b. Kind of medium
c. Material density
d. All of the above
Transondent facings are those transparent facings with holes. Which facing will reflect more sound?
Cafeteria with people in it
Which of the following sources of sound produces the highest sound pressure level (SPL)?
A luminous intensity of light expressed in candela; Unit of luminous intensity
Unit of luminance equal to 1 candela per square meter
Resistance in AC system
A type of HID (High-Intensity Discharge) lamp
Higher than 20,000 Hertz
AVOIDING ZONES OF DIRECT SOUND
First defense method from external noise by site selection and site planning for quiet internal acoustic environment
INSTALL ABSORBENT MATERIALS WITHIN THE WALL OF THE ENCLOSURE
The effective method can be employed to reduce direct noise, which is transmitted airborne, for noise reduction within a space
Perceptual characteristic of sound which is the average rate of flow of energy per unit area perpendicular to the direction of propagation
7,380 fps (foot per second)
Sound with a wavelength of 1.50 m at Frequency 1,500 Hz