G- All audiences allowed PG Contains some material R Strong for children under 17 X mature audiences only
US Naval Enlisted Rating (occupation of an enlisted sailor in the US Navy)
The Motion Picture Association of America only uses G, PG, PG-13, R, NC-17.In the British rating system, 'Universal' means Suitable For All.
PG-13 for sexual content and some strong language.
NRC - Noise Reduction Coefficients The Noise Reduction Coefficient (NRC) is a scalar representation of the amount of sound energy absorbed upon striking a particular surface. An NRC of 0 indicates...