Four sources, four design hypotheses and the exact limits of what they support.
Paper links are provided for source checking. We do not reproduce paper figures or assert that they prove the performance of this product. Previous local PDF copies were not available. / 提供论文原文链接供核对；不擅自复制论文插图，也不把文献结论等同于产品实测。此前四份本地 PDF 原件不可用。
Ear-space and anthropometric modeling motivates a shape informed by ear landmarks. Design inference: use a continuous spine and soft liner. Required test: multiple ear sizes and contact-pressure mapping.
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Research on bone-conduction stimulation sites and ear-canal occlusion suggests perception depends on test conditions. Design inference: compare contact positions. It does not justify a specific ±3 mm optimum.
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Around-the-ear EEG work illustrates the ear as a sensing location. It does not establish EEG or recording capability in this concept.
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OpenEarable ExG provides an ear-worn biopotential research reference. Design inference: keep electronics modular where practical. This is not a validated product feature.
View original publication ↗Evidence chain: publication → design hypothesis → concept drawing → CAD → physical prototype → validation. Only the early stages are present here. / 证据链：论文→设计假设→概念图→CAD→实体样机→验证。目前仅完成前期阶段。