The 40DD is an IEC 61094 1/8" prepolarized pressure microphone with rear-venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements. Its tiny size allows it to be used for measuring very high frequency sounds without disturbing the sound field. It can measure sound pressure levels up to 174 dB in the range of 6 Hz to 140 kHz.
G.R.A.S. 40BI 1/4 Ext. Polarized Intensity Microphone Set - G.R.A.S. Sound & Vibration - PDF Catalogs, Technical Documentation
GRAS 40DD 1/8 Prepolarized Pressure Microphone
G.R.A.S. 40AK 1/2 Ext. Polarized Intensity Microphone Set - G.R.A.S. Sound & Vibration - PDF Catalogs, Technical Documentation
GRAS 46DE 1/8'' CCP Pressure Standard Microphone Set
Array Microphone Type 40PH - G.R.A.S. Sound & Vibration - PDF Catalogs, Technical Documentation
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GRAS 46DD-FV 1/8'' CCP Pressure Standard Microphone Set, Front Vented
Array Microphone Type 40PH - G.R.A.S. Sound & Vibration - PDF Catalogs, Technical Documentation
1/8 CCP Pressure Standard Microphone Set - 46DE
1/8 CCP Pressure Standard Microphone Set - 46DE
½ Free-Field Microphone, Infra-Sound Type 40AZ - G.R.A.S. Sound & Vibration - PDF Catalogs, Technical Documentation
