1-inch Pressure Microphone Type 40EN

Product catalog summary

Product Overview: The G.R.A.S. 1-inch Pressure Microphone Type 40EN is designed for precision acoustic measurements, particularly in couplers like the G.R.A.S. RA0075 NBS 9A 6 cm³ Coupler, and can be flush-mounted for boundary measurements. It is suitable for laboratory-standard applications and complies with IEC 1094 specifications.

Specifications:

Frequency Response: 2.6 Hz - 8 kHz (± 2.0 dB)
Nominal Sensitivity: 50 mV/Pa
Polarization Voltage: 200 V
Upper Limit (3% Distortion): 146 dB re. 20 µPa
Microphone Thermal Noise: 9.6 dBA re. 20 µPa
Nominal Capacitance: 56 pF
Temperature Range: -40 °C to +150 °C
Dimensions: Length with grid: 19.0 mm, without grid: 17.1 mm; Diameter: 23.77 mm
Weight: 32 g

Venting Options: The microphone can be front, rear, or non-vented using specific O-rings and a provided tool (GR0603).

Environmental and Durability Features: Made from non-corrosive stainless materials, the microphone is designed to withstand rough handling and corrosive environments. It is guaranteed for 5 years and comes with an individual calibration chart.

Additional Features: Adapters are available for use with G.R.A.S. 1/2-inch preamplifiers. The microphone's design minimizes disturbances in sound fields, with corrections available for higher frequency reflections and diffractions.

Included Accessories: O-ring (OR5003) and a key for changing O-rings (GR0603).