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 diameter | 1/2 " | ||
| application | diffuse field | ||
| sensitivity | 12.6 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 noise | 26 dB relative to 20 uPA | ||
| inherent noise | 22 dB (A), based on 20 uPA | [2] | |
| dynamic range | > 147 dB relative to 20 uPA | ||
| TEDS chip | By default, integrated | [1] | |
| Operating conditions | |||
| The temperature range (operation) | -40 ... 176 ° F | -40 ... 80 ° C | |
| Temperature coefficient of sensitivity | 0.003 dB / ° F | 0.006 dB / ° C | [3] [2] |
| Influence of static pressure | -0.007 dB / kPa | [3] [2] | |
| Humidity coefficient of sensitivity | 0.002 dB /% RH | [3] [2] | |
| Influence by axial vibration | 67 dB relative to 20 uPA | [2] | |
| Technical characteristics | |||
| polarization voltage | 0 V | [4] | |
| supply voltage | 20 ... 30 V DC | ||
| Constant current supply | 2 ... 20 mA | ||
| Bias voltage | 10 ... 14 V DC | ||
| Maximum output range | ± 7 V pk | ||
| output impedance | <50 ? | ||
| physical properties | |||
| housing material | Stainless Alloy | ||
| pressure equalization | behind | [5] | |
| electrical connection | BNC connector | ||
| Mounting thread (preamp) | 0.5 to 60 US | ||
| Size - diameter (with cap) | 0.52 in | 13.2 mm | |
| Size - Diameter | 0.50 in | 12.7 mm | |
| Size - Height (with cap) | 3.47 in | 88.3 mm | |
| Size - Height (without cap) | 3.46 in | 87.8 mm | |
| Dimensions | 1.59 oz | 45 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-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-378A21
