Sponsored Links
Background noise interferes with telephone conversations, and
- conditions are satisfactory at levels less than 65 SIL (dB) (approx. 72 dBA)
- conditions are difficult at levels in the range 65 - 80 SIL (dB) (approx. 72 - 87 dBA)
- conditions are impossible at levels above 80 SIL (dB) (approx. 87 dBA)
SIL - Speech Interference Levels
Sponsored Links
Related Topics
Room acoustics and acoustic properties, decibel A, B and C, Noise Rating (NR) curves, sound transmission, sound pressure, sound intensity and sound attenuation.
Related Documents
Logarithmic unit used to describe ratios of signal levels - like power or intensity - to a reference level.
Comparing Noise Criterion (NC, NCB, RNC) to Noise Rating (NR) and dB(A).
Background noise frequencies that interferes with speech.
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.
Sponsored Links
Search Engineering ToolBox
- the most efficient way to navigate the Engineering ToolBox!
About Engineering ToolBox!
We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.
Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.
Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected.
AddThis use cookies for handling links to social media. Please read AddThis Privacy for more information.