Range of |
Range of NC curves |
||
dB A |
NC |
||
Large buildings |
Radio and TV studios.......................................... | 25-30 |
20-25 |
Concert and opera halls....................................... | 25-35 |
20-30 |
|
Churches.......................................................... | 25-35 |
20-30 |
|
Theaters, Multipurpose halls................................. | 25-35 |
20-30 |
|
Libraries, Museums............................................. | 25-35 |
20-30 |
|
Schools, Classrooms............................................ | 30-40 |
25-35 |
|
Cinema............................................................. | 35-45 |
30-40 |
|
Banquet halls..................................................... | 40-50 |
35-45 |
|
Hospitals |
Private rooms..................................................... | 30-40 |
25-35 |
Operation Theaters............................................. | 35-45 |
30-40 |
|
Halls, Laboratories.............................................. | 35-45 |
30-40 |
|
Waiting rooms.................................................... | 40-50 |
35-45 |
|
Offices |
Board rooms...................................................... | 25-35 |
20-30 |
Conference rooms.............................................. | 30-40 |
25-35 |
|
Executive Offices............................................... | 35-45 |
30-40 |
|
General open offices........................................... | 35-45 |
30-40 |
|
Typing pools...................................................... | 40-50 |
35-45 |
|
Computer rooms................................................. | 45-65 |
40-55 |
|
Hotels, Restaurants |
Rooms.............................................................. | 30-40 |
25-35 |
and stores |
Restaurants....................................................... | 35-45 |
30-40 |
Halls, Lobbies..................................................... | 35-45 |
30-40 |
|
Stores.............................................................. | 40-50 |
35-45 |
|
Supermarkets..................................................... | 45-55 |
40-50 |
|
Residential |
Single Family homes (rural and suburban)................ | 25-35 |
20-30 |
Buildings |
Single Family homes (urban)................................. | 30-40 |
25-35 |
Apartment buildings............................................. | 35-45 |
30-40 |
|
Factories |
Light machinery, assembly lines............................. | 50-70 |
45-65 |
foundries, heavy machinery.................................. | 60-80 |
55-75 |
|
Damage risk criteria |
90 |
85 |