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-The *SpHEAR (Spherical Harmonics Ear) Project is a collection of 3D models and ssociated code for building, testing and calibrating full surround Ambisonics microphones. All 3D models are written in Openscad with the code licensed under the GPL 3+ license (GNU Public License version 3 or higher), and the 3D models licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International license.
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+The *SpHEAR (Spherical Harmonics Ear) Project is a collection of 3D models and associated code for building, testing and calibrating full surround Ambisonics microphones. All 3D models are written in Openscad with the code licensed under the GPL 3+ license (GNU Public License version 3 or higher), and the 3D models licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International license.
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The 3D models are almost completely parametric and are designed to be able to be printed on low cost widely available 3D printers (at CCRMA we use an Ultimaker 2 Extended Plus printer, using PLA material). The design is modular and tries to avoid using overhangs and support structures. That is why each microphone assembly is made of a number of independently printed capsule holders interconnected by legs that interlock and hold the structure together. The capsule holders and the mount are glued together to create a 3D structure that securely holds all microphone capsules. A mount that can be clipped into a standard microphone stand is part of the design.
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The 3D models are almost completely parametric and are designed to be able to be printed on low cost widely available 3D printers (at CCRMA we use an Ultimaker 2 Extended Plus printer, using PLA material). The design is modular and tries to avoid using overhangs and support structures. That is why each microphone assembly is made of a number of independently printed capsule holders interconnected by legs that interlock and hold the structure together. The capsule holders and the mount are glued together to create a 3D structure that securely holds all microphone capsules. A mount that can be clipped into a standard microphone stand is part of the design.
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Fernando Pablo Lopez-Lezcano