Loudspeaker Module Sound Channel Inner Width Optimization
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Solution Overview
Problem
Conventional loudspeaker modules suffer from high frequency distortion due to narrow sound channels, which impede smooth sound transmission and degrade acoustic performance.
Innovation Solution
A loudspeaker module design featuring a square loudspeaker unit with a sound channel where the inner end width is longer than three-fifths of the loudspeaker unit's side length, ensuring smooth sound transmission and reducing high frequency distortion, along with additional features like a dust screen, damping hole, and flexible circuit board for improved acoustic quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the sound channel is made narrow to reduce module size, then the module becomes more compact, but the high frequency distortion increases and sound quality deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the width of the sound channel at different positions. The inner end width is specifically set to be no less than 3/5 of the loudspeaker unit side length, while other parts of the sound channel can be narrower. This localized widening at the critical inner end position reduces high frequency distortion without requiring the entire module to be large, thus resolving the contradiction between compact size and sound quality.
2Object-generated harmful factors
If the inner sound hole width is increased to improve sound quality, then high frequency distortion is reduced, but the module size increases
Solution Approach 1:
The patent applies parameter changes by establishing a specific quantitative relationship for the inner end width parameter - it should be no less than 3/5 of the side length of the loudspeaker unit. This parameter optimization ensures sufficient sound channel width for high frequency transmission while controlling the overall module dimensions, thus resolving the contradiction between reducing distortion and maintaining compact size.
Data Source
AI summary
A loudspeaker module comprises a housing and a loudspeaker unit. A cavity for accommodating and fixing the loudspeaker unit is provided in the housing. The loudspeaker unit divides the cavity into a front and rear sound cavity. A sound hole is provided on the housing, which is connected to the front sound cavity by a sound channel, and the loudspeaker unit has a square structure. The sound channel comprises an inner end close to the loudspeaker unit and an outer end communicated with the sound hole. The width of the inner end is longer than three fifths of the length of a side, corresponding to the inner end, of the loudspeaker unit. The loudspeaker module of the present invention has the advantage of good acoustic performance.