The *SpHEAR Project
TinySpHEAR with Zapnspark interfaces
The TinySpHEAR microphone is a traditional 4 capsule tetrahedral first order Ambisonics microphone. This improved design adds four printed circuit boards with Zapnspark phantom power interfaces housed in the microphone body. A trailing cable ends in four XLR connectors. The picture shows the full design as previewed in OpenSCAD and a picture of the second prototype (built with Primo EM182 10mm capsules, 9.6mm microphone radius).
The 3D models also include a shock mount that clips into a standard microphone stand mount. The two main model files are tuned for EM182 (10mm) and EM200 (14mm) capsules. Uncomment the different "render_" lines to render different parts or the complete microphone assembly.
A few more pictures detailing the assembly process:
Wiring the capsules:
Connecting the capsules with the printed circuit boards:
Sliding the printed circuit boards into the slots in the body:
Connecting to the 4 conductor cable:
Ready to test:
The full microphone including the shock mount: