PCB-378B20
- 1/2 "-ICP® precision microphone for diffuse field applications,
- Combination of microphone capsule PCB-377 B 20 and preamp PCB-426E01,
- Sensitivity 50 mV / PA,
- Dynamic range > 135 dB,
- Frequency range 3.75 … 12,500 Hz,
- BNC connector,
- As system calibrated,
- No longer available (replacement: PCB-378C20)
basic data | |||
Nominal microphone diameter | 1/2 " | ||
application | diffuse field | ||
Sensitivity in open circuit | 50 mV / Pa | [3] | |
Sensitivity in the open circuit (± 1.5 dB) | -26 dB relative to 1 V / Pa | [3] | |
Frequency range (± 1 dB) | 7 ... 6300 Hz | ||
Frequency range (± 2 dB) | 3.75 ... 12,500 Hz | ||
Lower limit frequency | 1.0 ... 3.0 Hz | ||
Self-noise (linear) | <20 dB relative to 20 uPA | ||
inherent noise | <16.5 dB (A) relative to 20 uPA | ||
Dynamic range (for distortion ?3%) | > 135 dB in relation to 20 uPA | ||
Dynamic range (maximum without taxes) | 138 dB relative to 20 uPA | [1] [2] | |
TEDS chip | By default, integrated | [4] | |
Operating conditions | |||
The temperature range (operation) | -40 ... 176 ° F | -40 ... 80 ° C | |
Temperature coefficient of sensitivity (-10 ... 70 ° C) | 0.004 dB / ° F | 0.009 dB / ° C | [1] [3] |
Influence of static pressure | -0.013 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 relative to 20 uPA | [1] | |
Technical characteristics | |||
polarization voltage | 0 V | [5] | |
supply voltage | 20 ... 30 V DC | ||
Constant current supply | 2 ... 20 mA | ||
Bias voltage | 10 ... 14 V DC | ||
output impedance | <50 ? | ||
Maximum output range | ± 7 V pk | ||
physical properties | |||
housing material | Stainless Alloy | ||
pressure equalization | behind | [6] | |
electrical connection | BNC connector | ||
Mounting thread (cap) | 0.5 to 60 US | ||
Size - diameter (with cap) | 0.52 in | 13.2 mm | |
Size - diameter (without cover) | 0.50 in | 12.7 mm | |
Size - Height (with cap) | 3.62 in | 91.9 mm | |
Size - Height (without cap) | 3.58 in | 90.9 mm | |
Dimensions | 1.63 oz | 45.8 grams | [1] |
Hints | |||
[1] | typically, | ||
[2] | peak | ||
[3] | Relative to 250 Hz | ||
[4] | TEDS memory IEEE PP1451.4 | ||
[5] | prepolarised | ||
[6] | Pressure equalization by the preamplifier | ||
[7] | Details: see PCB Declaration of Conformance PS064 | ||
included supply | |||
ACS-42 | Calibration of a microphone with preamplifier | -1 | |
(TLD) TEDS memory according to IEEE P1451.4 | |||
included supply | |||
ACS-63 | Calibration of a microphone with preamplifier | -1 |