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46AO 1/2" CCP Pressure Standard Microphone Set
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46AO 1/2" CCP Pressure Standard Microphone Set
The 46AO is a 1/2" CCP microphone set for wide-frequency pressure measurements. Its LEMO equivalent is 46AG.
The 46AO is a high-precision microphone suitable for laboratory work.
Regarding temperature range, see the Specifications. Should higher temperature limits be required, we recommend considering the GRAS probe microphones where the microphone and preamplifier can be isolated from the hot source.
Key Specifications
| Polarization/Connection | 0 V / CCP |
| Frequency range (±1 dB) | 5 Hz to 12.5 kHz |
| Frequency range (±2 dB) | 3.15 Hz to 20 kHz |
| Dynamic range lower limit with GRAS preamplifier | 25 dB(A) |
| Dynamic range upper limit with GRAS preamplifier | 150 dB |
| Set sensitivity @ 250 Hz (±3 dB) | 12 mV/Pa |
| Set sensitivity @ 250 Hz (±3 dB) | -38.5 dB re 1V/Pa |
| Output impedance | <50 Ω |
| Output Voltage Swing, min. @ 24-28 V CCP voltage supply | 8 Vp |
| Power supply min. to max. | 2 to 20 mA |
| Power supply min. to max. (single/balanced) | N/A V |
| DC bias voltage, typ. | 12 V |
| Microphone venting | Rear (Front on request) |
| IEC 61094-4 Designation | WS2P |
| Temperature range, operation | -30 to 85 °C / -22 to 185 °F |
| Temperature range, storage | -40 to 85 °C / -40 to 185 °F |
| Temperature coefficient @250 Hz | -0.01 dB/°C / -0.006 dB/°F |
| Static pressure coefficient @250 Hz | -0.007 dB/kPa |
| Humidity range non condensing | 0 to 90 % RH |
| Humidity coefficient @250 Hz | -0.001 dB/% RH |
| Influence of axial vibration @1 m/s² | 66 dB re 20 µPa |
| TEDS (IEEE 1451.4) | 27 v. 1.0 |
| Connector type | BNC |
| Weight | 33 g / 1.164 oz |
Specifications from the official GRAS product sheet. Please refer to the attached datasheet for full details.
