PCB-HT378B20

PCB-HT378B20

  • 1/2 "-ICP® precision microphone for diffuse field applications,
  • Combination of microphone capsule 377 B 20 and pre HT426E01,
  • Operating temperature up to 120 ° C,
  • Sensitivity 50 mV / PA,
  • Dynamic range > 137 dB,
  • Frequency range 3.5 … 12,500 Hz,
  • BNC connector,
  • As system calibrated,
  • No longer available (replacement: PCB-HT378C20)
  • basic data
    Nominal diameter of microphone1/2 "
    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)6 … 6,300 Hz
    (±2 dB) frequency range3.5 … 12,500 Hz
    lower limiting frequency (-3 dB)1.0 … 2.75 Hz
    Noise (linear)< 32 dB in relation to 20 µPa
    noise< 17 dB(A) in relation to 20 µPa
    Dynamic range (for THD ≤ 3%)> 137 dB in relation to 20 µPa
    dynamic range (maximum without clipping)140 dB in relation to 20 µPa[1 ] [2]
    TEDS Chipintegrated by default[4]
    conditions
    temperatureh (operating)-40 … 248 ° F-40 … 120 ° C
    Temperature coefficient of sensitivity (-10 … 70 ° C)0,004 dB/°F0.009 dB / ° C[1] [3]
    Influence of static pressure0.013 dB/kPa[1]
    influence by humidity (0 … 100%, non-condensing)-0.01 … 0.01 dB/% RH[3]
    influence by axial vibration (0.1 g, 1 m/s²)66 dB in relation to 20 µPa[1]
    technical characteristics
    polarization voltage0 V[5]
    supply20 … 32 V DC
    constant power supply2 … 20 mA
    Bias voltage10 … 14 V DC
    output impedance< 55 Ω
    Maximum output range±7 V pk
    physical properties
    Housing materialstainless alloy
    pressureback[6]
    electrical connectionBNC-Plug
    Mounting thread (cap)0,5 - 60 UNS
    size - diameter (with cap)0.52 in13.2 mm
    Size - diameter (without protection cap)0.50 in12.7 mm
    size - height (with cap)3.88 in98.6 mm
    Size - height (without protection cap)3.84 in97.5 mm
    mass1.74 oz49.2 grams[1]
    notes
    [1]typically
    [2]peak
    [3]based on 250 Hz
    [4]TEDS memory in accordance with IEEE PP1451. 4
    [5]Prepolarized
    [6]pressure compensation by the pre
    [7]details: see PCBs Declaration of conformance PS065
    Accessories
    ACS-42Calibration of a microphone with pre-amplifier-1
    (TLD) TEDS memory in accordance with IEEE P1451. 4
    Accessories
    ACS-63calibration of a microphone with Vorverstä stronger-1

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