PCB-377B20
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PCB-377B20

  • Prepolarized 1/2 "precision microphone for diffuse field applications,
  • sensitivity 50 mV / PA,
  • dynamic range > 144 dB,
  • frequency range 3.15..." 12,500 Hz,
    • no longer available (replacement: PCB-377 C 20)
Basic data
Nominal microphone diameter 42401
application diffuse-field
Sensitivity in the open circuit 50 mV / PA [3]
sensitivity in the open circuit (±1. 5 dB) -26 dB in relation to 1 V / PA [3]
Frequency range (± 1 dB) 5... 6,300 Hz
(±2 dB) frequency range 3.15... 12,500 Hz
lower limiting frequency (-3 dB) 1.0... 2.4 Hz
resonance frequency (phase shift 90°) 12,000 Hz [1]
noise < 15 dB(A) in relation to 20 µPa
Dynamic range (for THD ≤3%) > 144 dB in relation to 20 µPa
microphone type in accordance with IEC 651 type 1 [2]
Conditions of use
temperature range (operation) -40... 248 ° F -40... 120 ° C
Temperature coefficient of sensitivity (10...50°C) 0,005 dB/°F F 0.009 dB / ° C [3] [1]
Influence by static pressure -0.01 dB/kPa [3] [1]
Humidity coefficient of sensitivity (0... 100%, non-condensing) ±0,001 dB/% RH [3]
Influence by axial vibration (0.1 g, 1 m/s²) 63 dB in relation to 20 µPa [1]
Technical properties
capacity (polarized) 11 pF [1]
Polarization voltage 0 V [4]
Physical properties
Housing material Stainless steel alloy
Pressure compensation Rear
Mounting thread (for preamp) 0,4606" - 60 UNS 11,7 mm - 60 UNS
Mounting thread (for cap) 0,5" - 60 UNS 12,7 mm - 60 UNS
Size - diameter (with cap) 0.52 in 13.2 mm
Size - diameter (without protection cap) 0.5 in 12.7 mm
Size - height (with cap) 0.64 in 16.2 mm
Size - height (without protection cap) 0.6 in 15.3 mm
Mass 0.28 oz 7.8 grams [1]
Notes
[1] Typically
[2] The tolerances of the model 377B 20 between 50% and 70% the amount in accordance with this standard permissible deviations.
[3] Based on 250 Hz
[4] Before polarized
Included accessories
ACS-20 Calibration of a precision capacitor microphone -1
PCB-377B20

Specific References

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377B20_drawing.PDF

Technical drawing

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377B20_manual.PDF

Operating instructions

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377B20_specs.PDF

Technical data sheet

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