型号 | 377B01 378C01 | 377B02 378B02 | 377B10 378C10 | 377B11 378B11 | 377B20 378C20 | 377B40 | 377B41 | 377C01 378C01 | 377C10 378C10 |
直径 | 1/4” | 1/2” | 1/4” | 1/2” | 1/2” | 1/2” | 1/2” | 1/4” | 1/4” |
响应类型 | 自由场 | 自由场 | 压力场 | 压力场 | 任意场 | 自由场 | 自由场 | 自由场 | 压力场 |
开路灵敏度（250Hz） | 3.16mV/Pa | 50mV/Pa | 1mV/Pa | 50mV/Pa | 50mV/Pa | 12.5mV/Pa | 50mV/Pa | 2.0mV/Pa | 1.0mV/Pa |
频率响应 （±2dB） | 4Hz~80KHz | 3.15Hz~ 20KHz | 4Hz~70KHz | 3.15Hz~10KHz | 3.15Hz~12.5KHz | 4Hz~ 40KHz | 3.15Hz~20KHz | 3Hz~100KHz | 4Hz ~70KHz |
极化电压（V） | 0 | 0 | 0 | 0 | 0 | 0 | 200 | 0 | 0 |
动态范围 （-3%） | 165dB | 146dB | 170dB | 146dB | 146dB | 160dB | 146dB | 44-165dB | 44-165dB |
动态范围 （热噪音） | 28dB | 15dB | 30dB | 15dB | 15dB | 20dB | 15dB | 40-170dB | 41-165dB |
前置放大器 连接 | 5.7mm - 60UNS | 11.7mm - 60UNS | 5.7mm - 60UNS | 11.7mm - 60UNS | 11.7mm - 60UNS | 11.7mm - 60UNS | 11.7mm - 60UNS | 5.7mm - 60UNS | 5.7mm - 60UNS |
工作温度（℃） | -40 ~ +120 | -40 ~ +120 | -40 ~ +120 | -40 ~ +120 | -40 ~ +120 | -40 ~ +150 | -40 ~ +150 | -40 ~ +120 | -40 ~ +120 |
传声器管径（包括格栅） | 7.0mm | 13.2mm | 7.0mm | 13.2mm | 13.2mm | 13.2mm | 13.2mm | 7.0mm | 7.0mm |
传声器管高（包括格栅） | 10.5mm | 16.2mm | 10.4mm | 16.2mm | 16.2mm | 12.7mm | 16.3mm | 10.5mm | 10.5mm |
| English: | SI: | ||
|---|---|---|---|
| Performance | |||
| Nominal Microphone Diameter | 1/4" | 1/4" | |
| Frequency Response Characteristic | Pressure | Pressure | |
| Sensitivity | 1.0 mV/Pa | 1.0 mV/Pa | [4] |
| Sensitivity (±3 dB) | -60 dB re 1 V/Pa | -60 dB re 1 V/Pa | [4] |
| Frequency Range (±2 dB) | 4.0 to 70000 Hz | 4.0 to 70000 Hz | |
| Lower Limiting Frequency (-3 dB) | 0.75 to 4.0 Hz | 0.75 to 4.0 Hz | |
| Inherent Noise | 50 dB(A) re 20 µPa | 50 dB(A) re 20 µPa | [3][1] |
| Dynamic Range (3% Distortion Limit) | 173 dB re 20 µPa | 173 dB re 20 µPa | [1] |
| TEDS Compliant | Yes | Yes | [2] |
| Environmental | |||
| Temperature Range (Operating) | -40 to +158 °F | -40 to +70 °C | |
| Temperature Coefficient of Sensitivity (+14 to +158°F (-10 to +70°C)) | 0.004 dB/°F | 0.007 dB/°C | [4][1] |
| Static Pressure Coefficient | -0.003 dB/kPa | -0.003 dB/kPa | [4][1] |
| Humidity Coefficient of Sensitivity (0 to , non-condensing) | ±0.0014 | ±0.0014 | [4] |
| Influence of Axial Vibration (0.1g (1 m/s²)) | 66 dB re 20 µPa | 66 dB re 20 µPa | [1] |
| Electrical | |||
| Polarization Voltage | 0 V | 0 V | [5] |
| Excitation Voltage | 20 to 32 VDC | 20 to 32 VDC | |
| Constant Current Excitation | 2 to 20 mA | 2 to 20 mA | |
| Output Bias Voltage | 10 to 14 VDC | 10 to 14 VDC | |
| Maximum Output Voltage | ±8 Vpk | ±8 Vpk | |
| Output Impedance | <50 Ohm | <50 Ohm | |
| Physical | |||
| Housing Material | Stainless Alloy | Stainless Alloy | |
| Venting | Side | Side | |
| Electrical Connector | 10-32 Jack | 10-32 Jack | |
| Mounting Thread (Preamplifier) | 0.25 - 60 UNS | 0.25 - 60 UNS | |
| Size - Diameter (with grid) | 0.28 in | 7.1 mm | |
| Size - Diameter (without grid) | 0.25 | 6.35 mm | |
| Size - Height (with grid) | 2.07 in | 52.6 mm | |
| Size - Height (without grid) | 2.02 in | 51.3 mm | |
| Weight | 0.27 oz | 7.8 gm | [ |
