Microphone power supply
4 channel | Type 2829 Bruel and Kjaer

4-channel Microphone Power Supply Type 2829 is designed for acoustical systems where robustness and reliability are important. It is a simple power supply that introduces negligible noise into the measurement system. The functionality of the connected microphones and preamplifiers can be checked by the Charge Injection Calibration method. The test signal is applied to all the connected microphone and preamplifier combinations by means of the mini-jack socket on the rear panel.
Note that Brüel & Kjær Preamplifiers Types 2669, 2670 and 2671 are all delivered with the TEDS capability. There are over 40 microphone/preamplifier combinations available as calibrated units where the combined sensitivity is already written into TEDS.

Applications include the production, testing and quality control of loudspeakers and telephones. The elegant design enables several Type 2829 units to be stacked on top of one another, if necessary.

If the connected microphone/preamplifier combinations contain TEDS (Transducer Electronic Data Sheets), they can be interrogated by connecting a TEDS Editor via the four pole RJ 11 socket labelled IEEE 1451.4. Type 2829 can supply both 0 V and 200 V polarization voltage for the microphones.