Model : 2520 | Precision Condenser Microphone

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1/4 in free-field, condenser microphone, typical sensitivity = 3.7 mV/Pa. 200 VDC polarization

Externally polarized 1/4 inch free field microphone, 4 mV/Pa, 80 kHz.

  • Nominal Microphone Diameter: 1/4"
  • Frequency Response Characteristic: Free-Field
  • Frequency Range: (±1dB)6 to 16000 Hz
  • Dynamic Range: >164 dB re 20 µPa

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English: SI:
Performance
Nominal Microphone Diameter 1/4" 1/4"
Frequency Response Characteristic (at 0° incidence) Free-Field Free-Field
Open Circuit Sensitivity (±2.4 dB) -48 dB re 1 V/Pa -48 dB re 1 V/Pa [2]
Open Circuit Sensitivity 4 mV/Pa 4 mV/Pa [2]
Frequency Range (±1 dB) 6 to 16000 Hz 6 to 16000 Hz
Frequency Range (±2 dB) 4 to 80000 Hz 4 to 80000 Hz
Lower Limiting Frequency (-3 dB) 0.5 to 3.0 Hz 0.5 to 3.0 Hz
Resonant Frequency (90° Phase Shift) 90000 Hz 90000 Hz [1]
Inherent Noise <30 dB(A) re 20 µPa <30 dB(A) re 20 µPa
Dynamic Range (3% Distortion Limit) >164 dB re 20 µPa >164 dB re 20 µPa
Standards Designation (IEC 61094-4) WS3F WS3F
Environmental
Temperature Range (Operating) -40 to 302 °F -40 to 150 °C
Temperature Coefficient of Sensitivity (+14 to +122°F (-10 to +50°C)) 0.004 dB/°F 0.01 dB/°C [1]
Static Pressure Coefficient -0.0073 dB/kPa -0.0073 dB/kPa [1]
Humidity Coefficient of Sensitivity (0 to 95%, non-condensing) ±0.001 dB/%RH ±0.001 dB/%RH
Influence of Axial Vibration (0.1g (1 m/s²)) 60 dB re 20 µPa 60 dB re 20 µPa [1]
Electrical
Capacitance (Polarized) 6.8 pF 6.8 pF [1]
Polarization Voltage 200 V 200 V
Physical
Housing Material Stainless Alloy Stainless Alloy
Venting Rear Rear
Mounting Thread (Preamplifier) 0.2244 - 60 UNS 5.7 mm - 60 UNS
Mounting Thread (Grid) 0.25 - 60 UNS 6.35 mm - 60 UNS
Size - Diameter (with grid) 0.276 in 7 mm
Size - Diameter (without grid) 0.250 in 6.35 mm
Size - Height (with grid) 0.406 in 10.3 mm
Size - Height (without grid) 0.361 in 9.2 mm
Weight 0.06 oz 1.7 gm [1]
* All specifications are at room temperature unless otherwise specified
.


Specification Notes


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


Accessories


Supplied
ACS-20 Calibration of precision condenser microphones 1


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