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Sound Absorption Products are
those which reduce and absorb reverberation and reflection
off hard surfaces. The best use of absorptive products
in home theater applications are to attenuate perceived
noise and reverberation in the room where the
sound source is. These absorbing products are rated
with a comparative N.R.C. number. Typically, these N.R.C.
numbers are averaged from the broad band frequencies
tested from 250 Hz(low frequency) to 2000 Hz (high frequency).
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