PCB-377B20

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 diameter42401
applicationdiffuse-field
Sensitivity in the open circuit50 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 range3.15... 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 651type 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 F0.009 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 voltage0 V[4]
Physical properties
Housing materialStainless steel alloy
Pressure compensationRear
Mounting thread (for preamp)0,4606" - 60 UNS11,7 mm - 60 UNS
Mounting thread (for cap) 0,5" - 60 UNS12,7 mm - 60 UNS
Size - diameter (with cap)0.52 in13.2 mm
Size - diameter (without protection cap)0.5 in12.7 mm
Size - height (with cap)0.64 in16.2 mm
Size - height (without protection cap)0.6 in15.3 mm
Mass0.28 oz7.8 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-20Calibration of a precision capacitor microphone-1

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