Twinsburg, Ohio – G.R.A.S. Sound & Vibration, a manufacturer of high-quality measurement microphones and related acoustic equipment introduces the 46DE microphone set where no parts are larger than 1/8".
The 46DE is a constant current power (CCP) pressure microphone set with a nominal sensitivity of 0.8 mV/Pa. It is compatible with modern analyzer systems that support IEPE and ICP.
Because of its small size and low sensitivity, the 46DE microphone can measure high frequencies and high sound pressure levels and can be used where you previously could not get access including small-scale models or where several microphones must be mounted close to each other for higher resolution.
The preamplifier consists of a very small input section, 1/8" in diameter, attached to the microphone, with the larger (1/4") output section at the other end of the specially designed cable, so the section of the preamplifier close to the microphone is kept small while space-demanding electronics in the output stage are located at the other end of a 40" cable. Customized lengths are available.
In collaboration with the Delft University of Technology, G.R.A.S. is testing how the 46DE microphone set can contribute to the analysis of trailing noise reduction measures such as serrated edges and meshes. The 46DE’s small size will allow for analysis of pressure fluctuations at trailing edges of geometries around 1/16", as well in fully porous configurations.