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46BL-1 1/4" CCP Pressure Standard Microphone Set, High Sensitivity
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46BL-1 1/4" CCP Pressure Standard Microphone Set, High Sensitivity
GRAS 46BL-1 is a high-sensitivity, low-noise ¼″ CCP condenser microphone set with rear-venting.
GRAS 46BL-1 is an updated version of GRAS 46BL. Concerning the physical considerations of incorporating or replacing GRAS 46BL in existing setups, 46BL-1 is a one-to-one match regarding performance, dimensions, and price; however, 46BL-1 has a slightly lower noise floor and a 180° phase shift.
For our users, data safety translates directly into requests for easier microphone selection, simple system configuration, and reduction of measurement errors. To meet these requirements, we invented the microphone set concept. It is simple, reliable, and robust and consists of a microphone cartridge and preamplifier combination, which is calibrated as one unit. This eliminates errors because there is only one sensitivity value to account for and the risk of contaminating the interface is eliminated. Combine this with our unique and proven design and you have the most reliable measurement microphone sets available in the industry today.
Key Specifications
| Polarization/Connection | 0 V / CCP |
| Frequency range (±1 dB) | 10 Hz to 10 kHz |
| Frequency range (±2 dB) | 4 Hz to 20 kHz |
| Dynamic range lower limit with GRAS preamplifier | 24 dB(A) |
| Dynamic range upper limit | 146 dB |
| Set sensitivity @ 250 Hz (±2 dB) | 20 mV/Pa |
| Set sensitivity @ 250 Hz (±2 dB) | -34 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. | 3.5 to 10 mA |
| DC bias voltage, typ. | 14 V |
| Microphone venting | Rear |
| IEC 61094-4 Designation | WS3P |
| 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 | -0.02 dB/°C / -0.012 dB/°F |
| Static pressure coefficient @250 Hz | –0.01 (typical value) dB/kPa |
| Humidity range non condensing | 0 to 90 % RH |
| Influence of axial vibration @1 m/s² | 60 (typical value) dB re 20 µPa |
| TEDS (IEEE 1451.4) | 27 v. 1.0 |
| Connector type | Microdot 10/32 |
| Weight | 8 g / 0.282 oz |
Specifications from the official GRAS product sheet. Please refer to the attached datasheet for full details.
