A new compact flush mount turbulence screen microphone kit helps improve aeroacoustic testing in wind tunnels. The system available from GRAS Sound and Vibration UK, has been specially developed for accurate testing in solid walled wind tunnels in the near and far field, at low and high wind speeds. By attenuating the hydrodynamic component of turbulence up to as much as 25dB, the acoustic signals of interest can now be identified and diagnosed with a much more reliable resolution.
The turbulence screen integrates the flush and recessed mounting techniques with a special wire mesh into one single unit and enables adaptation of several mounting options. Key features and benefits include very high induced flow noise reduction, extremely low acoustic attenuation, low installation height, front or rear mounting options and flush-mount and standard microphone accommodation.
The kit comprises a state-of-the-art 47BX 0.25in flush mount microphone set, which combines high precision and reliable noise measurement with the need for fitting sensors into very confined spaces and narrow structures. With an installation height of less than 10mm, thin coax wiring and front venting, this flush-mount microphone can be integrated into any design and application.