Speech interference level
Speech Interference Level (SIL) is an acoustical parameter calculated from sound pressure levels measured in octave bands. It is used to characterize a noise signal in the frequency range where the human ear has its highest sensitivity.
The Speech Interference Level is calculated as the arithmetic mean of unweighted sound pressure levels in three or four octave bands in the 500 Hz - 4 kHz frequency range
Several variants of the Speech Interference Level are in use:
- PSIL: Arithmetic mean of 500 Hz, 1 kHz and 2 kHz octave bands
- SIL3: Arithmetic mean of 1 kHz, 2 kHz and 4 kHz octave bands
- SIL4: Arithmetic mean of 500 Hz, 1 kHz, 2 kHz and 4 kHz octave bands
References
External links
This article is issued from Wikipedia - version of the 3/21/2013. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.