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 |
PCB-378B20
