CRJ700/705/900/1000-SL-21-029
Precondition: - Aircraft on ground - APU on - both packs on - Recirculation fan on - all gaspers(cockpit) on -Cockpit door closed
Sound meter settings: - switch A to "500 - 1KHz - range switch to "LO" -response switch "SLOW"
sound meter position for test
max sound level	75 dB(A) +/- 5 dB(A).