Acoustical wall panels with a 85 noise reduction coefficient are capable of absorbing what percentage of the sound waves that hit them?

Acoustical wall panels are designed to absorb sound, and the noise reduction coefficient (NRC) quantifies their sound-absorbing effectiveness. An NRC of 85 indicates that the panels can absorb 85% of the sound waves that strike them. This means that when sound waves hit the surface of these panels, they can significantly reduce the amount of sound that bounces back into the room, effectively contributing to a quieter environment.

Understanding how NRC values correspond to sound absorption is crucial in interior design and acoustics, particularly in spaces where noise control is essential, such as hotels, conference rooms, or any public areas. Thus, an NRC of 85 directly translates to an 85% sound absorption capability, making the selected answer correct.