PCB-377B20
- Prepolarized 1/2 "precision microphone for diffuse field applications,
- sensitivity 50 mV / PA,
- dynamic range > 144 dB,
- frequency range 3.15..." 12,500 Hz,
- no longer available (replacement: PCB-377 C 20)
| Basic data | |||
| Nominal microphone diameter | 42401 | ||
| application | diffuse-field | ||
| Sensitivity in the open circuit | 50 mV / PA | [3] | |
| sensitivity in the open circuit (±1. 5 dB) | -26 dB in relation to 1 V / PA | [3] | |
| Frequency range (± 1 dB) | 5... 6,300 Hz | ||
| (±2 dB) frequency range | 3.15... 12,500 Hz | ||
| lower limiting frequency (-3 dB) | 1.0... 2.4 Hz | ||
| resonance frequency (phase shift 90°) | 12,000 Hz | [1] | |
| noise | < 15 dB(A) in relation to 20 µPa | ||
| Dynamic range (for THD ≤3%) | > 144 dB in relation to 20 µPa | ||
| microphone type in accordance with IEC 651 | type 1 | [2] | |
| Conditions of use | |||
| temperature range (operation) | -40... 248 ° F | -40... 120 ° C | |
| Temperature coefficient of sensitivity (10...50°C) | 0,005 dB/°F F | 0.009 dB / ° C | [3] [1] |
| Influence by static pressure | -0.01 dB/kPa | [3] [1] | |
| Humidity coefficient of sensitivity (0... 100%, non-condensing) | ±0,001 dB/% RH | [3] | |
| Influence by axial vibration (0.1 g, 1 m/s²) | 63 dB in relation to 20 µPa | [1] | |
| Technical properties | |||
| capacity (polarized) | 11 pF | [1] | |
| Polarization voltage | 0 V | [4] | |
| Physical properties | |||
| Housing material | Stainless steel alloy | ||
| Pressure compensation | Rear | ||
| Mounting thread (for preamp) | 0,4606" - 60 UNS | 11,7 mm - 60 UNS | |
| Mounting thread (for cap) | 0,5" - 60 UNS | 12,7 mm - 60 UNS | |
| Size - diameter (with cap) | 0.52 in | 13.2 mm | |
| Size - diameter (without protection cap) | 0.5 in | 12.7 mm | |
| Size - height (with cap) | 0.64 in | 16.2 mm | |
| Size - height (without protection cap) | 0.6 in | 15.3 mm | |
| Mass | 0.28 oz | 7.8 grams | [1] |
| Notes | |||
| [1] | Typically | ||
| [2] | The tolerances of the model 377B 20 between 50% and 70% the amount in accordance with this standard permissible deviations. | ||
| [3] | Based on 250 Hz | ||
| [4] | Before polarized | ||
| Included accessories | |||
| ACS-20 | Calibration of a precision capacitor microphone | -1 |
PCB-377B20
