Model : 2540 | Precision Condenser Microphone

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1/2 in free field, condenser microphone, typical sensitivity = 14 mV/Pa. 200 VDC polarization

Externally polarized 1/2 inch free-field microphone, 14.5 mV/Pa, 40 kHz.

  • Nominal Microphone Diameter: 1/2"
  • Frequency Response Characteristic: Free-Field
  • Frequency Range: (±1dB)5 to 16000 Hz (5 to 16000 Hz)
  • Dynamic Range: >160 dB re 20 µPa

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English: SI:
Performance
Nominal Microphone Diameter 1/2" 1/2"
Frequency Response Characteristic (at 0° incidence) Free-Field Free-Field
Open Circuit Sensitivity (±1.2 dB) -36.8 dB re 1 V/Pa -36.8 dB re 1 V/Pa [2]
Open Circuit Sensitivity 14.5 mV/Pa 14.5 mV/Pa [2]
Frequency Range (±1 dB) 5 to 16000 Hz 5 to 16000 Hz
Frequency Range (±2 dB) 4 to 40000 Hz 4 to 40000 Hz
Lower Limiting Frequency (-3 dB) 1 to 3 Hz 1 to 3 Hz
Resonant Frequency (90° Phase Shift) 24000 Hz 24000 Hz [1]
Inherent Noise (Microphone) <20 dB(A) re 20 µPa <20 dB(A) re 20 µPa
Dynamic Range (3% Distortion Limit) >160 dB re 20 µPa >160 dB re 20 µPa
Environmental
Temperature Range (Operating) -40 to 302 °F -40 to 150 °C
Temperature Coefficient of Sensitivity (+14 to +122°F (-10 to +50°C)) 0.003 dB/°F 0.006 dB/°C [1] [2]
Static Pressure Coefficient -0.007 dB/kPa -0.007 dB/kPa [1] [2]
Humidity Coefficient of Sensitivity (0 to 100%, non-condensing) -.001 to +.001 dB/%RH -.001 to +.001 dB/%RH [2]
Influence of Axial Vibration (0.1g (1 m/s²)) 65 dB re 20 µPa 65 dB re 20 µPa [1]
Electrical
Capacitance (Polarized) 20 pF 20 pF [1]
Polarization Voltage 200 V 200 V
Physical
Housing Material Stainless Alloy Stainless Alloy
Venting Rear Rear
Mounting Thread (Preamplifier) 0.4606 - 60 UNS 11.7 mm - 60 UNS
Mounting Thread 0.5 - 60 UNS 12.7 mm - 60 UNS
Size - Diameter (with grid) 0.52 in 13.2 mm
Size - Diameter (without grid) 0.5 in 12.7 mm
Size - Height (with grid) 0.64 in 16.3 mm
Size - Height (without grid) 0.61 in 15.5 mm
Weight 0.23 oz 6.5 gm [1]
* All specifications are at room temperature unless otherwise specified
.


Specification Notes


[1] Typical.
[2] re 250 Hz
[1] Typical.
[2] re 250 Hz
[1] Typical.


Accessories


Supplied
ACS-20 Calibration of precision condenser microphones 1


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