Features:
- Type 4942 1/2" Prepolarized Diffuse-field Microphone
- Connects to DeltaTron input
- Sensitivity: 50 mV/Pa
- Frequency: 6.3 − 16000 Hz
- Dynamic Range: 14.6 − 146 dB
- Temperature: −40 to +150°C (−40 to +302°F)
- Polarization: 0V
Applications:
- Diffuse-field measurements
- In-cabin measurements
Type 4942 is optimised for general, random-incidence measurements and for noise measurements in accordance with ANSI standards. Being prepolarized, it can be used with both DeltaTron and classical preamplifiers.
Diffuse-field microphones, also called random-incidence microphones, are designed to have a flat response to signals arriving simultaneously from all directions. They should be used in all situations where the sound field is diffuse, including measurements in reverberation chambers and where several sources contribute to the sound pressure at the measurement position. Applications include indoor measurements, where the sound is reflected by walls, ceilings and objects in the room. Another important application area is in cabin measurements.
Manufacturing and Stability
The use of a press-fitted stainless steel diaphragm ensures superior long-term stability and mechanical robustness. In fact, Type 4942 will withstand the 1m drop test specified in IEC60068-2-32.
All Brüel&Kjær measuring microphones are assembled in a clean room. This ensures that the microphones maintain their inherent low noise and high stability, even when used in environments with a combination of high humidity and high temperature.
Polarization Voltage
Being prepolarized, Type 4942 is especially well-suited for battery operated equipment or for operation in humid environments. Type 4942 can be used with DeltaTron as well classical type preamplifiers.
| Manufacturer | Bruel & Kjaer |
|---|---|
| Condition | Used |