Electroacoustic Transducer Side Venting Collar Adsorber Distribution
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Solution Overview
Problem
Prior art micro speakers face issues with uneven or incomplete filling of adsorber material in the back volume, leading to decreased sound quality due to the use of small fill holes and the resulting contact between adsorber material and critical components like magnets, coil, and membrane.
Innovation Solution
The design incorporates side openings in the collar for side venting, allowing direct filling of the adsorber material within the enclosure, eliminating the need for a typical frame and back vents, and ensuring even distribution of the adsorber material, thus preventing contact with the speaker's components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a small fill hole is used to fill the enclosure with adsorber material, then the enclosure can be filled with adsorber, but the filling becomes uneven or incomplete, resulting in decreased sound quality
Solution Approach 1:
The single fill hole is segmented into multiple side openings distributed around the collar perimeter. This segmentation allows adsorber material to enter from multiple locations simultaneously, ensuring even and complete distribution throughout the enclosure while maintaining ease of manufacture through a simple filling process.
Solution Approach 2:
The filling approach transitions from a single-point (vertical) filling method to a multi-point (lateral) filling method. By distributing openings around the collar perimeter, the adsorber material can be introduced from multiple spatial dimensions, achieving uniform distribution without complex filling procedures.
2Reliability
If the back volume is filled with adsorber material to lower resonant frequency, then the resonant frequency can be reduced to achievable values, but the adsorber may contact and damage critical components like magnets, coil, and membrane
Solution Approach 1:
The collar with side openings acts as an intermediary structure between the adsorber material and the speaker components. The side openings serve as controlled access points that allow adsorber to fill the back volume while preventing direct contact with magnets, coil, and membrane, thus mediating the interaction between these elements.
Solution Approach 2:
The collar provides localized protection around critical components by positioning side openings at specific locations. This creates zones of controlled adsorber access that maintain necessary acoustic properties while protecting sensitive areas from adsorber contact through strategically placed openings with maximum dimensions smaller than adsorber particles.
3Ease of manufacture
If a typical frame and back vents are used in the speaker design, then the speaker can be assembled with standard components, but the speaker size increases, which is not suitable for mobile devices
Solution Approach 1:
The collar combines multiple functions into a single component: it serves as both the mounting structure for the speaker assembly and the venting mechanism. By integrating the venting function directly into the collar structure with built-in side openings, the design eliminates the need for separate frame and back vent components, reducing overall speaker size while maintaining ease of assembly.
Solution Approach 2:
The collar is designed as a multi-functional element that provides structural support, positioning, and acoustic venting simultaneously. The side openings in the collar perform the venting function that would otherwise require separate components, making the collar a universal component that handles multiple tasks and reduces the overall component count and speaker footprint.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances sound quality by ensuring complete and even distribution of the adsorber material, reducing the risk of adsorber material contact with critical components and improving acoustic performance.
Implementation Method 1
the back volume is filled with an adsorber material which leads to an apparent virtual enlargement of the back volume. The adsorber serves to lower the resonant frequency of the speaker
Data Source
AI summary
A new audio transducer for mobile devices having a collar with side openings that provide side venting to a back volume within an enclosure. The side openings eliminate the need for a typical frame and back vents thereon, which leads to a smaller size speaker. Each of the side openings have a maximum size less than the size of an adsorber material, which prevents the adsorber material coming into contact with the magnets, coil, and membrane of the speaker. The side openings and the size thereof also permit the enclosure to be directly filled with an adsorber material. The direct filling of the adsorber leads to more even and complete distribution of the adsorber within the back volume, which, in turn, improves sound quality of the speaker.