Noise - Acceptable dBA Level
Acceptable noise - dBA - level at typical common locations.
The main advantage with dB(A) - the A weighted noise or sound measurement - is
- its adaption to how the human ear responses to sound - the human hearing, and
- the possibility to measure noise with "low cost" instruments
Maximum acceptable Equivalent Sound Level - Leq - at some locations:
|Location||Effects||Maximum Leq |
|Time of day|
|Bedroom||sleep disturbance, annoyance||30||8||night|
|Living area||annoyance, speech interference||50||16||day|
|Outdoor living area||moderate annoyance||50||16||day|
|Outdoor living area||serious annoyance||55||16||day|
|Outdoor living area||sleep disturbance, with open windows||45||8||night|
|School classroom||speech interference, communication disturbance||35||8||day|
|Hospitals patient rooms||sleep disturbance, communication interference||30 - 35||8||day and night|
Room acoustics and acoustic properties, decibel A, B and C, Noise Rating (NR) curves, sound transmission, sound pressure, sound intensity and sound attenuation.
Maximum Sound Pressure Levels in Rooms
Maximum recommended sound pressure levels in rooms like kindergartens, auditoriums, libraries, cinemas and more.
Outdoor Ambient Sound Pressure Levels
Outdoor ambient sound pressure levels (dBA) in rural and urban business and industrial environments with or without limited traffic.
Sound Intensity, Power and Pressure Levels
Introduction to decibel, sound power, intensity and pressure.
Sound power from sources like fans, jet engines, cars, humans and more.