Airport Noise Abatement Lab

174 Lehman Building

Contact Person: Howard Patrick

Description

This laboratory is located on the first floor of the Lehman Building. It has a total of 1008 square feet, apportioned to two rooms as shown in the floor plan to the right.

Equipment

MB10C electromagnetic shaker, with a capacity of 1200 lb force sinusoidal and 1000 lb random, for vibration testing.
B and K integrating sound level meters.
8 channel analog/digital data acquisition system, using a notebook computer which includes SpectraPRO signal processing software, good for real-time evaluation as well as recording for later evaluation.
Engine noise test facility for evaluating reciprocating engines up to 600 horsepower. It incorporates an AW dynamometer and simultaneously records engine torque and power.
Anechoic wind tunnel for testing propellers or turbines up to 18 inches in diameter. It is used for determining engine radiated noise and engine performance characteristics. The maximum flow speed is 160 knots with 0.2% turbulence intensity level.

Utilization

This laboratory is devoted to experimental studies of the sources of aircraft noise and the means of reducing the intensity of sound radiated by propellers, engine exhaust, etc. The room houses a 1200 lb force capacity shaker table (a humongous stereo speaker) for vibration tests. There is a variety of instrumentation and computer software for gathering and analyzing acoustic data. This lab operates in conjunction with the anechoic wind tunnel located in the Wind Tunnel Lab across the hall. This will be used for for testing propellers or turbines up to 18 inches in diameter and for determining engine radiated noise and engine performance characteristics. The maximum flow speed is 160 knots with 0.2% turbulence intensity level.

Propeller Vibration Test