PCB-378A21

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

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