| PARAMETER | TOLERANCE |
|---|---|
| Overall sound pressure level averaged over all control microphones, ref specified overall sound pressure level | +3 dB -1 dB |
| Overall sound pressure level at each control microphone, ref specified overall sound pressure level | +4 dB -2 dB |
| Averaged test spectrum from all control microphones at levels above -15 dB in 1/3 octave bands, ref specified 1/3 octave band sound pressure levels. | ±4 dB |
| Averaged test spectrum from all control microphones at levels below -15 dB and above -25 dB in 1/3 octave bands, ref specified 1/3 octave band sound pressure levels. | ±6 dB |
| Averaged test spectrum from all control microphones at levels -25 dB and below in 1/3 octave bands, ref specified 1/3 octave band sound pressure levels. | ±10 dB |
| Duration | ±5 % or ±1 min whichever is less |
MIL-STD-810H
METHOD 515.8