NC Range, dB
Typical Application
Sound Reproduction
Studios, Private Home
25-30
Legitimate Theaters,
Board Rooms, Conference
Rooms
30-35
Private Office,
Ball-Rooms, Banquet
Rooms, Hospital Rooms,
Movie Theaters, School
Classrooms, Libraries,
Lecture Hall
30-35
Prisoner
Housing/Brig
35-40
Public Libraries,
Building Lobbies, School
Laboratories,
Restaurants, General
Offices, Gymnasium
40-45
Halls and Corridors,
Cafeterias, Retail Store
40-60
Computer Room
45-50
Supermarkets and
Department Stores (Main
Floor), Restaurant
Kitchens, Commissary
45-75
Manufacturing Area,
Light
55-75
Manufacturing Area,
Heavy
**************************************************************************
Manufacturer certified sound pressure level rating of inlets and outlets.
Conform with the following permissible room sound pressure levels:
NC Range, dB
Typical Application
[_____]
[_____]
2.7.3
Throw
The distance from the diffuser, register, or grille to the point which the
air velocity falls below [0.25] [0.50] [0.64] [1.00] meter per second [50]
[100] [125] [200] feet per minute [_____] shall not exceed [1.5] [_____]
times the outlet mounting height.
2.7.4
Drop
Maximum drop of air stream shall not be within [1.50] [1.83] meters [5] [6]
SECTION 15810N
Page 18
Previous Page
