GRAS RA0090 Pistonphone Coupler
A larger-volume coupler for enabling GRAS 42AA/AP Pistonphone to produce a sound pressure level of 94 dB instead of 114 dB re. 20 μPa. Essential when calibrating highly sensitive, GRAS low noise measuring systems.
This pistonphone coupler is designed exclusively for calibrating low-noise microphones, such as the GRAS 40HF, 40HH, 40HL, 40HT, and 47HC. It is not suitable for use with low-noise ear simulators, including the GRAS 43BB product family. Alternatively, the GRAS 42AG sound calibrator set at 94 dB can be used to calibrate both low-noise ear simulators and microphones.
Technology
Introduction
The GRAS RA0090 is a larger-volume coupler for enabling GRAS 42AA/AP Pistonphone to produce a sound pressure level of 94 dB instead of 114 dB re. 20 μPa. Essential when calibrating highly sensitive, GRAS low noise measuring systems.
1" diameter microphones fit directly. 1/2" microphones fit via an included adapter.
Quality & Warranty
GRAS accessories are made of stainless steel, alloys and high-quality composites. These items are covered by a 2 year warranty respecting their intended use.
On consumables like batteries, cables and windscreen we offer a 6 month warranty.
