Which of the following best describes the meaning of the rating called NIC (Noise Isolation Class) ?
A) The measurement of surfaces in which sound transmits off of.
B) A measures the effectiveness of panels in reducing speech intelligibility.
C) The measurement of placement of elements that block direct line-of-sight travel paths for sound waves.
D) An interzonal rating that evaluates panels in terms of both absorption and transmission of sound.
Correct Answer:
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