GRAS 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

Technology

Introduction

The GRAS 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 GRAS 67TS-CL-1 includes a GRAS 47BX 1/4" Flush-mount microphone set.

A GRAS 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 GRAS RA0295 Turbulence Screen Accessories for Flush-mount Microphones. This kit must be ordered separately.

A GRAS 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 GRAS 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 GRAS for advice or regarding customization.

Specifications

Coupler volume
mm³
0.4 ccm
Specification Conditions

Ordering info

Included items

GRAS 67TS

Turbulence Screen Kit

 

Accessories

GRAS RA0295

Turbulence Screen Kit Accessories for Flush-mount Microphone

GRAS RA0296

Turbulence Screen Kit Accessories for for standard microphone/preamplifier

GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.

Get Quote