PCB-378A21
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      PCB-378A21

      • 1/2 "-ICP® precision microphone for diffuse field applications,
      • Combination of microphone capsule PCB 377A21 and preamp PCB-426E01,
      • Sensitivity 12.6 mV / PA,
      • Dynamic range > 147 dB,
      • Frequency range 4 … 25,000 Hz,
      • BNC connector,
      • As system calibrated
      basic data
      Nominal microphone diameter1/2 "
      applicationdiffuse field
      sensitivity12.6 mV / Pa[3]
      Sensitivity (± 2 dB)-38 dB relative to 1 V / Pa[3]
      Frequency range (± 2 dB)4 ... 25,000 Hz
      Lower limit frequency (3 dB)1.0 ... 2.4 Hz
      inherent noise26 dB relative to 20 uPA
      inherent noise22 dB (A), based on 20 uPA[2]
      dynamic range> 147 dB relative to 20 uPA
      TEDS chipBy default, integrated[1]
      Operating conditions
      The temperature range (operation)-40 ... 176 ° F-40 ... 80 ° C
      Temperature coefficient of sensitivity0.003 dB / ° F0.006 dB / ° C[3] [2]
      Influence of static pressure-0.007 dB / kPa[3] [2]
      Humidity coefficient of sensitivity0.002 dB /% RH[3] [2]
      Influence by axial vibration67 dB relative to 20 uPA[2]
      Technical characteristics
      polarization voltage0 V[4]
      supply voltage20 ... 30 V DC
      Constant current supply2 ... 20 mA
      Bias voltage10 ... 14 V DC
      Maximum output range± 7 V pk
      output impedance<50 ?
      physical properties
      housing materialStainless Alloy
      pressure equalizationbehind[5]
      electrical connectionBNC connector
      Mounting thread (preamp)0.5 to 60 US
      Size - diameter (with cap)0.52 in13.2 mm
      Size - Diameter0.50 in12.7 mm
      Size - Height (with cap)3.47 in88.3 mm
      Size - Height (without cap)3.46 in87.8 mm
      Dimensions1.59 oz45 grams[2]
      Hints
      [1]TEDS memory IEEE PP1451.4
      [2]typically,
      [3]Relative to 250 Hz
      [4]prepolarised
      [5]Pressure equalization by the preamplifier
      included supply
      ACS-42Calibration of a microphone with preamplifier-1
      (TLD) TEDS memory according to IEEE P1451.4
      included supply
      ACS-63Calibration of a microphone with preamplifier-1
      PCB-378A21

      Specific References

      Download

      378A21_drawing.PDF

      Technical drawing

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      378A21_manual.PDF

      Operating instructions

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      378A21_specs.PDF

      Technical data sheet

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