What does NRC measure in interior acoustics?

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Multiple Choice

What does NRC measure in interior acoustics?

Explanation:
NRC represents how much sound energy a material absorbs across common room frequencies. It’s the average of the absorption coefficients at 250, 500, 1000, and 2000 Hz, giving a single value from 0 to 1. Higher numbers mean more absorption and less sound reflected back into the room, which helps reduce overall reverberation. It’s a property of the material tested in a standard setup (usually in a reverberation chamber) and is not a measure of how much a surface reflects, a direct decibel reduction, or reverberation time itself.

NRC represents how much sound energy a material absorbs across common room frequencies. It’s the average of the absorption coefficients at 250, 500, 1000, and 2000 Hz, giving a single value from 0 to 1. Higher numbers mean more absorption and less sound reflected back into the room, which helps reduce overall reverberation. It’s a property of the material tested in a standard setup (usually in a reverberation chamber) and is not a measure of how much a surface reflects, a direct decibel reduction, or reverberation time itself.

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