Special Microphones

GRAS Sound and Vibration produce a whole range of special microphones to meet most of your sound measurement requirements.

GRAS 40HL
Low Noise

Connects directly into your Sound Level Meter for extremely low sound level measurements

GRAS 40PH/PL
Array Microphone

The Array Microphone Types 40PH and 40PL are low-cost microphones for general-purpose measurements in arrays. They have a wide frequency range and provide you with a large dynamic range to 134 dB.

GRAS 40SPS
Surface Microphone

The Surface Microphone Type 40PS is a low-cost microphone for general purpose measurements on planar and curved surfaces. It has a wide frequency range to 20 kHz and a large dynamic range, up to around 136 dB.

GRAS 40SA/SC
Probe Microphone

The Probe Microphones are specially designed for your more difficult measurement situations, for example in high temperatures or airflow. Its right-angle design makes the probe microphone particularly well suited for measurements on exhaust systems and other machinery in general.

GRAS 41AN
Window Microphone

It is attached (using double-sided adhesive tape) to the outer surface of a window pane, or leant up against it supported by a pole, for monitoring the noise exposure on the outer surface of the window.