SUGGESTED LIMITS FOR ROOM LOUDNESSAUDITORIUMS and music halls OFFICES

1 to 3 Concert and opera halls 2 to 6 Executive1.5 5 Legitimate theaters 3 9 Supervisor2 6 Movie theaters 4 12 General open offices2 6 Semi-outdoor amphitheater 6 18 Tabulation and computaition2 6 Lecture halls 4 12 Drafting1.5 5 Multi-purpose 3 9 Professional offices3 9 Courtrooms 1.7 5 Confernce rooms4 12 Auditorium lobbies 1 3 Board of Directors2 6 TV audience studios 5 15 Halls and corridors

CHURCHES and schools PUBLIC buildings

1.7 to 5 Sanctuaries 3 to 9 Museums2.5 8 Schools and classrooms 2 6 Planetariums4 12 Recreation halls 4 12 Post offices6 18 Kitchens 4 12 Courthouses2 6 Libraries 2 6 Public libraries4 12 Laboratories 4 12 Banks (general banking areas)5 15 Corridors and halls 4 12 Lobbies and corridors

HOSPITALS and clinics RESIDENCES

1.7 to 5 Private rooms 3 to 9 Two and three family units2.5 8 Wards 3 9 Apartment houses4 12 Laboratories 3 9 Private homes (urban)2.5 8 Operating rooms 1.3 4 Private homes (rural & suburban)4 12 Lobbies and waiting rooms4 12 Halls and corridors RESTAURANTS, cafeterias, lounges

HOTELS 4 to 12 Restaurants6 18 Cafeterias

4 to 12 Lobbies 5 15 Cocktail lounges8 24 Banquet rooms 3 9 Social clubs3 9 Ball rooms 4 12 Night clubs2 6 Individual rooms or suties 8 24 Banquet room7 21 Kitchens and laundries4 12 Hall and corridors RETAIL stories6 18 Garages

7 to 21 SupermarketINDOOR sports activities 6 18 Department stores(main floor)

4 12 Department stores(upper floor)4 to 12 Gymnasiums 6 18 Small retail stores3 9 Coliseums 4 12 Clothing stores7 21 Swimming pools4 12 Bowling alleys TRANSPORTATION (rail, bus, plane)4 12 Gambling casinos

5 to 15 Waiting roomsMANUFACTURING areas 4 12 Ticket sales offices

6 12 Control rooms and towers25 to 60 Heavy Machinery 5 15 Lounges20 60 Foundries 6 18 Retail shops12 36 Assembly line15 50 Machine shops MISCELLANEOUS20 50 Plating shops50 60 Punch press 3 to 9 Reception rooms 7 21 Tool maintenance 5 15 Washrooms and toilets 5 15 Foreman's office 1 3 Studios for sound reproduction10 30 General storage 4 12 Other studios

Note: Values shown above are room loudness in sones and are not fan sone ratings.