Asymmetrical Waveguide Loudspeaker for Occupant-Focused Audio
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Solution Overview
Problem
Existing loudspeaker assemblies in automotive applications lack effective directivity control and efficiency, particularly in shaping sound fields to focus audio towards vehicle occupants while minimizing sound transmission to unnecessary areas.
Innovation Solution
A loudspeaker assembly incorporating an asymmetrical waveguide with a creased flare and continuous blend geometry that controls audio directivity, optimizing sound transmission towards vehicle occupants and reducing unwanted sound dispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a waveguide is used to shape sound field and control directivity, then audio transmission towards vehicle occupants is improved, but sound transmission to unnecessary areas increases
Solution Approach 1:
The waveguide employs an asymmetrical geometry design where the front opening dimensions differ from the diaphragm dimensions, creating unequal expansion in horizontal and vertical directions. This asymmetry enables selective direction of sound waves toward vehicle occupants while blocking transmission to unnecessary areas, resolving the contradiction between directivity control and unwanted sound dispersion.
2Manufacturing precision
If the waveguide geometry is optimized for specific vehicle trim shapes, then audio performance is improved, but adaptability to various vehicle trim shapes decreases
Solution Approach 1:
The waveguide is designed with universal adaptability through its asymmetrical geometry that can be configured for different vehicle trim shapes (door panels, pillars, dashboards) while maintaining optimized audio performance. The design allows the same waveguide structure to serve multiple vehicle interior locations and trim configurations, achieving both performance optimization and versatility.
Data Source
AI summary
In at least one embodiment, a loudspeaker assembly is provided. The loudspeaker assembly includes a loudspeaker and a waveguide. The loudspeaker includes a diaphragm to transmit an audio output. The waveguide being asymmetrical and at least partially surrounding the diaphragm. The waveguide being configured to control a directivity of the audio output.