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G.R.A.S. Releases the Turbulence Mesh Screen- for Near-Field Aeroacoustic Measurements


June 2016, MARIETTA, GA ~ The G.R.A.S. 67TS-1-CL Turbulence Screen Kit is designed for aeroacoustic testing in solid-walled wind tunnels. By attenuating the hydrodynamic component of turbulence up to as much as 25 dB, the acoustic signals of interest can be identified and diagnosed with a much more reliable resolution. The flush-mount turbulence screen integrates the flush-mount and recessed mounting techniques with a special wire mesh into a single unit, and allows for adaptation of several mounting options.

The included G.R.A.S. 47BX-CL 1/4" CCP Flush-mount Microphone Set can be attached to the assembly either with a “rubber band” (O-ring) or a holder plate of POM-material. The parts necessary for both methods are included. The microphone set has an integrated, customized length cable terminated with a Microdot connector. An adapter to BNC is included. When ordering, please specify the required length in cm.

As “default” the complete assembly will fit in a flat wall with 4 mm thickness. A hole with diameter 44 mm must be provided. It is possible to attach the assembly using glue. For mounting with screws, the 67TS is provided with 4 unthreaded holes with diameter 3.1 mm.

Features:

  • Very high flow noise reduction

  • Very low acoustic attenuation

  • Low installation height

  • Front or rear mounting options

  • 1/4” Flush-mount and standard microphone accommodation