Headphone Earbud Design Using Representative Ear Model
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Solution Overview
Problem
Conventional non-occluding earbuds lack an airtight seal, affecting acoustic performance and prioritizing design constraints over comfort, leading to a need for a methodology that balances sound quality and comfort in headphone design.
Innovation Solution
A methodology using a representative ear model is developed to determine the form of headphone parts by orienting ear models within a coordinate system, focusing on common volumes and surfaces to create a design that accommodates both acoustic performance and comfort, ensuring a consistent user experience across various ear shapes and sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional non-occluding earbuds are designed to accommodate circular driver components, then manufacturing constraints are met, but comfort and acoustic performance deteriorate due to lack of airtight seal and poor anatomical fit
Solution Approach 1:
The patent applies preliminary action by creating a representative ear model before the actual earbud design process. This model, derived from multiple oriented ear models and representing a common volume, serves as a pre-established anatomical reference that guides subsequent design decisions, ensuring both comfort and acoustic performance are optimized from the outset rather than being compromised by later manufacturing constraints
Solution Approach 2:
The patent employs parameter changes by transitioning from traditional circular driver constraints to anatomically-driven dimensional parameters. The representative ear model provides new geometric parameters (common volume boundaries, surface topography) that replace the conventional circular form factor, allowing the driver and housing to be sized and shaped according to actual ear anatomy rather than manufacturing convenience
2Device complexity
If earbud design is driven by electronic component constraints, then device complexity is reduced, but comfort level deteriorates due to poor anatomical fit
Solution Approach 1:
The representative ear model serves as a preliminary anatomical framework that simplifies the design process by providing pre-defined comfort zones and anatomical boundaries. Rather than iteratively adjusting to individual ear variations, designers can directly reference the common volume model to create universally comfortable fittings, reducing design complexity while improving comfort
Solution Approach 2:
The representative ear model provides universal applicability by representing the common anatomical features across multiple ears. A single design based on this model can be universally applied to diverse users, eliminating the need for multiple design iterations or custom fittings for different ear shapes, thus reducing overall design complexity while enhancing universal comfort
3Device complexity
If in-the-ear earbuds are designed without focusing on common ear volumes, then design process is simpler, but adaptability deteriorates due to inability to fit various ear shapes and sizes
Solution Approach 1:
The patent transforms the design parameters from fixed geometric constraints to anatomically-derived variables. The representative ear model provides dynamic parameters (common volume boundaries, surface contours) that naturally adapt to represent diverse ear anatomies, enabling the design to accommodate various ear shapes and sizes without increasing design process complexity
Solution Approach 2:
By pre-establishing the representative ear model that encapsulates common anatomical features, the patent creates a universal template that inherently provides adaptability. This preliminary anatomical framework allows designers to create one-size-fits-most solutions that adapt to individual variations, eliminating the need for complex multi-variant design processes
Data Source
AI summary
A method for determining a form for a headphone part using a representative model includes receiving data for at least one ear model. The ear model may be oriented within a coordinate system based on the data, where orienting is focused on the alignment with respect to one or more areas of the ear. A representative model is determined from a plurality of oriented ear models, where the representative model is a representation for a volume determined to be common to at least two oriented ear models. The size and/or shape for the headphone part is determined based upon the representative model.