I needed an inconspicuous way to make stereo field recordings in environments with people. An old camera bag was converted to house my basic recording kit and EM172 microphones. A stereo buffer is provided by a converted yoga block. Inconspicuous windscreens for the mics are included in the design.
Acquiring a stereo image requires the acoustic separation of two microphones. Many strategies for omni-directional mics employ a physical boundary along with some geometric and spatial separation or conditions. I’ve adapted one in particular for its simplicity and flexibility. Photos are audio samples are included in the post.
The EM172 is a small and highly cost-effective electret capsule that has high sensitivity, low self-noise, and can be built into various form factors, including those for stereo field recording. Internet references are provided for a simple circuit that allows it to run on phantom power. A Neutrik XLR connector can house the mic and related components. This configuration should adapt well to various strategies for acoustic separation in field recording.