XB Freightliner

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Interior Noise Test Data Form

Test Condition 1: 80 dB(A) Stationary White Noise

Date 1999-05-26
Personnel B.L. and S.C.
Temperature (°F) 64
Humidity (%) 48
Wind Direction NW
Wind Speed (MPH) 5
Barometric Pressure (in.Hg) 29.97
Initial Sound Level Meter Calibration checked by B.L.
Interior Ambient Noise Level dB(A) 39.6
Exterior Ambient Noise Level dB(A) 56.8
Microphone Height During Testing(in) 45
Measurement Location Measured Sound Level dB(A)
Driver's Seat 53.5
Front Passenger Seats 53.8
In Line with Front Speaker 53.8
In Line with Middle Speaker 54.5
In Line with Rear Speaker 53.5
Rear Passenger Seats 53.9
Final Sound Level Meter Calibration checked by B.L.
Comments
All readings taken in the center aisle.