Miniature Loudspeaker Module Vertical Cavity Design
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Solution Overview
Problem
Miniature speaker modules face challenges in fully utilizing their housing space, leading to inefficiencies in sound cavity utilization and compromised sound quality due to restrictions in width and length directions.
Innovation Solution
The miniature speaker module design includes a supporting platform and partition wall within the housing, creating a front sound cavity and a rear sound cavity, with the speaker unit mounted on the platform, and an air flow channel encapsulated with mesh cloth, optionally filled with sound-absorbing particles, to optimize space usage and enhance acoustic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the housing size is reduced to make the speaker module more compact, then the portability is improved, but the sound cavity volume decreases leading to degraded sound quality
Solution Approach 1:
The patent transitions from traditional horizontal sound cavity expansion to vertical dimension utilization. The support platform extends downward into the housing, creating sound cavities in the vertical space below the speaker diaphragm. This dimensional shift allows adequate sound cavity volume to be achieved within a compact horizontal footprint, resolving the contradiction between small housing size and sufficient sound cavity volume for good sound quality
Solution Approach 2:
The housing internal space is segmented into multiple functional zones: a front sound cavity above the support platform and a rear sound cavity below it, separated by the platform structure. This segmentation allows independent optimization of each cavity's volume and shape, maximizing the total usable sound cavity volume within the constrained housing space while maintaining compact overall dimensions
2Volume of moving object
If the housing dimensions in width and length are restricted to achieve compact size, then the portability is improved, but the sound cavity utilization becomes inefficient
Solution Approach 1:
The support platform structure utilizes the vertical dimension (height) of the housing to create sound cavities, rather than relying solely on horizontal expansion. By positioning the platform below the speaker diaphragm and extending it downward, the design converts unused vertical space into functional sound cavities, achieving high space utilization efficiency within restricted width and length dimensions
Solution Approach 2:
The support platform is strategically positioned to create localized sound cavities where needed. The front sound cavity is formed above the platform and the rear sound cavity below it, with each cavity optimized for its specific acoustic function. This localized structuring ensures efficient utilization of every portion of the housing volume, converting previously wasted space into productive acoustic chambers
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 effectively converts excess space into a larger rear sound cavity, improving acoustic performance and sound quality by maximizing space utilization and adjusting the speaker unit's position, thereby enhancing low-frequency characteristics and overall sound quality.
Implementation Method 1
an air flow channel communicating the inside and outside of the first cavity is formed between the supporting platform and the side wall
Implementation Method 2
the first cavity is filled with sound-absorbing particles
Data Source
AI summary
Disclosed is a miniature speaker module. The module includes: a module housing and a speaker unit, wherein the speaker unit divides an inner space of the module housing into a front sound cavity and a rear sound cavity. The module housing includes a side wall and a bottom wall connected to the side wall, in which side wall being provided a sound outlet hole. The module housing further includes a supporting platform arranged in a cavity enclosed by the side wall and the bottom wall, and a partition wall connected to the supporting platform, wherein the partition wall and the bottom wall are parallel and oppositely arranged one above another. The speaker unit is mounted on the supporting platform. The speaker unit, the supporting platform and the partition wall constitute the front sound cavity, wherein the front sound cavity is in communication with the sound outlet hole.