Outer Ear Module Structure for Low-Cost Binaural Recording
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Solution Overview
Problem
Existing binaural recording systems face high manufacturing costs due to the complexity of replicating the human ear's auricle structure using silicone, which is necessary for accurate acoustic characteristics.
Innovation Solution
A simplified outer ear structure and module design featuring a base, first and second components, with specific through holes, recessed areas, and inwardly curved sidewalls, mimicking the human ear's anatomy to achieve acoustic characteristics while reducing complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silicone material is used for molding to closely replicate the real tactile sensation and auricle structure, then acoustic characteristics similar to real human ears are achieved, but manufacturing costs increase
Solution Approach 1:
The patent uses a simplified geometric model that copies only the essential acoustic functions of the human ear (auricle, concha, ear canal) rather than replicating the complete complex structure. This allows achieving similar acoustic characteristics with a manufacturable design that doesn't require expensive silicone molding processes
Solution Approach 2:
The patent modifies key geometric parameters (curvature radii, lengths, cross-sectional areas) of the simplified structure to match the acoustic properties of the human ear. By optimizing these parameters, the design achieves comparable sound pressure level curves without needing complex materials
2Reliability
If the auricle structure of the real human ear is retained to achieve similar acoustic characteristics, then acoustic performance is improved, but device complexity increases
Solution Approach 1:
The patent divides the outer ear structure into three distinct functional components: auricle (for sound collection), concha (for sound focusing), and ear canal (for sound transmission). This segmentation allows each part to be simplified independently while maintaining overall acoustic functionality
Solution Approach 2:
The patent extracts only the essential acoustic functions from the complex human ear structure, removing unnecessary anatomical details. The simplified model retains only the critical geometric features needed for acoustic performance, significantly reducing structural complexity
Data Source
AI summary
An outer ear structure of recording system includes a base, a first component and a second component. The base includes a first through hole extending along a first axis. The first component is disposed on the base and includes a second through hole corresponding to the first through hole and a recessed area surrounding the second through hole. The second component is disposed on the first component and is offset from the second through hole. An area of the second component is smaller than an area of the first component. The second component includes an inwardly curved side wall facing the first axis.