speech interference level (SIL)

For the evaluation of the sound behaviour of rooms, there is a room criterion ( RC), which consists of two values, a numerical value and one that evaluates the spectral quality to be expected. The numerical value is the SpeechInterferenceLevel (SIL). It corresponds to the arithmetic mean value of the sound pressure in the 500 Hz, 1 kHz and 2 kHz octave bands.