New 12BA and 12BB Microphone Power Modules From GRAS

January 28 2021, 00:20
GRAS Sound and Vibration introduced two new microphone power modules: GRAS 12BA and 12BB. These power modules are designed for users who need to power CCP measurement microphones and would like seamless integration of microphone sensitivity data via TEDS. The single-channel (12BA) and four-channel (12BB) USB-powered modules provide integrated TEDS support and are competitively priced for production test applications, saving time during setup and configuration.

The 12BA and 12BB power modules can be used with any audio analyzer, with TEDS data accessed in two ways. When paired with Audio Precision’s APx audio analyzers, TEDS can be read directly via the APx500 software. For use with other analyzers, TEDS data is available through the Mic Power Module App, a command-line interface for TEDS data output. The software and app ensure the accessibility of TEDS data.

An externally polarized condenser measurement microphone cannot work on its own. It needs to be connected to hardware that can act as an interface between the raw signal output and the data acquisition unit or measurement device. The Power Module is the interface that improves the performance and reliability of the measurement chain. The 12BA and 12BB modules are suitable for the wide range of GRAS CCP-powered microphones, such as the GRAS 146AE 1/2" CCP Free-field Microphone Set or the GRAS 46BL 1/4" CCP Pressure Standard Microphone Set, High Sensitivity.

Constant current power (CCP) microphone sets use high-quality coaxial cables. Some sets have a 3m cable included and others have cables as accessories. It should be noted that longer cables will influence the upper frequency and dynamic ranges. All GRAS microphone sets are delivered as a unit and are calibrated accordingly. The sets are delivered with calibration charts including sensitivity values and frequency response curves for the complete set.
More information on power modules is available here.

Based in Denmark, GRAS develops and manufactures state-of-the-art measurement microphones to industries where acoustic measuring accuracy and repeatability is of utmost importance in R&D, QA and production. This includes applications and solutions in the fields of aerospace, automotive, audiology, and consumer electronics.

GRAS is represented through subsidiaries and distributors in more than 40 countries. Since early 2020, the company is working in close strategic partnership with Audio Precision.
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