speech interference level


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speech interference level

[′spēch ‚in·tər¦fir·əns ‚lev·əl]
(acoustics)
The average sound pressure, in decibels above 0.0002 microbar, in the frequency range from 600 to 4800 hertz. Abbreviated SIL.
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Maximum speech interference levels in dB (A), which permit satisfactory hearing (after Kudesia and Tiwari, 2007) Maximum speech interference levels in dB (A) Types of voice distance from speaker 1 m 2 m 3 m Normal voice 55 49 43 Raised voice 61 55 49 Very loud voice 67 61 55 Shouting 73 67 61
To further assess potential speech intelligibility problems, the Preferred Speech Interference Levels (PSIL) of the noise environment in 'quiet' and in 'normal' operations were also calculated.

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