Maximum Sound Pressure Levels in Rooms
Maximum recommended sound pressure levels in rooms with activities like kindergartens, auditoriums, libraries, cinemas and more ...
Sound pressure level is the pressure of sound related to a fixed reference. The reference is the threshold of hearing 2 10-5 Pa, or in the logarithmic decibel scale the value 0 dB.
The table below can be used as a guide to maximum acceptable sound pressure levels in rooms with different types of activities.
Activity and Type of Area | Noise Rating NR value | Lp (dBA) |
---|---|---|
Kindergartens | 30 | 35 |
Auditorium | 25 | 30 |
Library | 30 | 35 |
Cinema | 30 | 35 |
Concert hall | 20 | 25 |
Court room | 25 | 30 |
Theater | 25 | 30 |
Store, retail | 35 | 40 |
Supermarkets | 40 | 45 |
Hospital, corridor | 30 | 35 |
Hospital, operating theater | 25 | 30 |
Hospital, private room | 20 | 25 |
Hotel, lobby | 35 | 40 |
Hotel, restaurant | 40 | 45 |
Hotel, ballroom | 30 | 35 |
Church | 25 | 30 |
Office | 30 | 35 |
School, lecture room | 25 | 30 |
School, corridor | 30 | 35 |
School, gymnasium | 30 | 35 |
Swimming pool | 35 | 40 |
Studio, record | 20 | 25 |
Studio, radio | 15 | 20 |
Studio, television with audience | 25 | 30 |
Studio, television without audience | 20 | 25 |