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Maximum recommended sound pressure levels in rooms 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.
Sound Pressure - Maximum Levels in Rooms
|Activity and Type of Area||Noise Rating|
|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 |
- Room acoustics and acoustic properties, decibel A, B and C, Noise Rating (NR) curves, sound transmission, sound pressure, sound intensity and sound attenuation.
- Noise is usually defined as unwanted sound - noise, noise generation, silencers and attenuation in HVAC systems.
- Human physiology, air quality and comfort temperatures, activity and metabolic rates, health effects of carbon monoxide and more.
- Logarithmic unit used to describe ratios of signal levels - like power or intensity - to a reference level.
- Sound pressure filters that compensates for the hearing sensed by the human ear.
- Acceptable noise - dBA - level at typical common locations.
- In a room the sound or noise will reach the receiver as direct and reverberant sound.
- An introduction to the nature of sound with frequencies, wave-lengths and octaves.
- Shift in hearing threshold for men and women vs. age.
- Room sound absorption and absorption coefficients for common materials like plaster walls, brickwork, plywood panels and more.
- Acoustic power of sound per unit area.
- Introduction to decibel, sound power, intensity and pressure.
- Sound power from sources like fans, jet engines, cars, humans and more.
- Sound Pressure is the force of sound on a surface perpendicular to the propagation of sound.
- OSHA maximum A-weighted sound pressure levels allowed per day.
- Calculate the speed of sound (the sonic velocity) in gases, fluids or solids.
- Change in sound pressure level and the subjective human perception.
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