G.R.A.S. 67TS Turbulence Screen Kit

Turb. att.: Up to 25 dB*
Turb. speed: Up to Mach 0.2
Freq. range (turbulence) 500 Hz - 10 kHz*
Acoustic att.: Less than 3 dB
Directivity: ± 60 Deg
*Depending on flow-speed

Introduction

The G.R.A.S. 67TS 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 kit does not include a microphone set. The G.R.A.S. 67TS-CL-1 includes a G.R.A.S. 47BX 1/4" Flush-mount microphone set.

A G.R.A.S. 1/4" CCP Flush-mount Microphone Set can be attached to the turbulence screen assembly either with a “rubber band” (O-ring) or a holder plate of POM-material. The parts necessary for both methods are part of the G.R.A.S. RA0295 Turbulence Screen Accessories for Flush-mount Microphones. This kit must be ordered separately.

A G.R.A.S. 1/4" standard microphone set can be attached to the turbulence screen assembly with a straight or an angled holder plate. These are part of the G.R.A.S. RA0296 Turbulence Screen Accessories for standard microphone/preamplifier. This kit must be ordered separately.

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 holes with diameter 3.1 mm. You are always welcome to contact G.R.A.S. for advice or regarding customization.

Included items

G.R.A.S. 67TS

Turbulence Screen Kit

 

Accessories

G.R.A.S. RA0295

Turbulence Screen Kit Accessories for Flush-mount Microphone

G.R.A.S. RA0296

Turbulence Screen Kit Accessories for for standard microphone/preamplifier

G.R.A.S. Sound & Vibration reserves the right to change specifications and accessories without notice.