Speaker Module With Divided Rear Acoustic Cavities
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Solution Overview
Problem
Conventional speaker modules with complex structures face challenges in balancing acoustic performance and fully utilizing the inner space, particularly in achieving high acoustic performance and convenience of assembly.
Innovation Solution
A speaker module design featuring a peripheral frame with sound holes and divided acoustic cavities for multiple speaker units, where each unit corresponds to a separate rear sub-cavity, enhancing acoustic performance and stereophonic effect by optimizing the use of inner space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional speaker module with only one speaker unit is used, then the structure is simple and assembly is convenient, but the acoustic performance cannot be fully optimized and the inner space is not fully utilized
Solution Approach 1:
The speaker module is segmented into multiple independent speaker units (first speaker unit and second speaker unit), each with its own dedicated acoustic cavity (first front acoustic cavity and second front acoustic cavity). This segmentation allows each speaker unit to operate independently, optimizing acoustic performance while maintaining a manageable modular structure that facilitates assembly.
Solution Approach 2:
The patent utilizes the vertical dimension by stacking speaker units and acoustic cavities in layers. The first and second speaker units are arranged at different heights, with corresponding front and rear acoustic cavities stacked vertically. This dimensional arrangement fully exploits the inner space of the peripheral frame while maintaining acoustic independence between units.
2Reliability
If multiple speaker units are provided to improve acoustic performance, then the acoustic performance and stereophonic effect are improved, but the structure becomes complex and assembly becomes difficult
Solution Approach 1:
The module is divided into identical or similar sub-assemblies (first speaker unit with its cavities, second speaker unit with its cavities). Each sub-assembly can be manufactured and tested independently, then assembled into the complete module. This segmentation reduces overall structural complexity by creating repeatable modular units.
Solution Approach 2:
The acoustic cavities are nested within the peripheral frame structure. The first front acoustic cavity and second front acoustic cavity are positioned within the boundaries of the peripheral frame, with rear acoustic cavities stacked behind them. This nesting approach consolidates multiple components into a compact integrated structure, reducing assembly complexity.
3Reliability
If multiple speaker units are provided to improve acoustic performance, then the overall acoustic performance and stereophonic effect are improved, but the inner space utilization becomes challenging
Solution Approach 1:
The patent transitions from a single-plane arrangement to a three-dimensional stacked arrangement. Speaker units and their corresponding acoustic cavities are positioned at different vertical levels, with front cavities facing outward and rear cavities stacked behind them. This dimensional approach maximizes the use of available volume within the peripheral frame.
Solution Approach 2:
Rear acoustic cavities are nested within the space behind the front acoustic cavities. The first rear acoustic cavity is positioned directly behind the first front acoustic cavity, and the second rear acoustic cavity is positioned behind the second front acoustic cavity. This nesting efficiently packs multiple cavities into the limited internal volume of the frame.
4Volume of stationary object
If speaker units are closely arranged to utilize space, then inner space is fully utilized, but acoustic interference between units increases
Solution Approach 1:
Each speaker unit is assigned its own dedicated front acoustic cavity and rear acoustic cavity, creating acoustically isolated channels. The first speaker unit communicates only with its own cavities, and the second speaker unit communicates only with its own cavities. This segmentation prevents acoustic interference between units while maintaining compact spacing.
Solution Approach 2:
The rear acoustic cavities act as intermediary spaces between the speaker units and the front acoustic cavities. Sound waves from each speaker unit are channeled through its dedicated rear cavity before reaching the front cavity, providing acoustic isolation and preventing direct interference between adjacent speaker units.
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
The design allows for improved acoustic performance and easier adjustment of acoustic characteristics, reducing interference between speaker units and enhancing the overall stereophonic effect, while effectively utilizing the inner space of the speaker module.
Implementation Method 1
the rear acoustic cavity is divided into a plurality of rear sub-cavities which are in the same number with the number of the speaker units, and each of the speaker units corresponds to one of the rear sub-cavities
Implementation Method 2
the peripheral frame is provided thereon with sound holes in communication with the outside, and a front acoustic cavity in communication with the sound holes
Implementation Method 3
the second sub-wall and the first sub-wall are bonded through ultrasonic welding
Data Source
AI summary
The present invention provides a speaker module comprising a peripheral frame and speaker units housed in the peripheral frame, and the peripheral frame is provided with sound holes in communication with the outside, a front acoustic cavity in communication with the sound holes is defined between one side of the speaker units and the peripheral frame, and a rear acoustic cavity is defined between the peripheral frame and another side of the speaker units away from the front acoustic cavity; in which the speaker units are provided in plurality, and the rear acoustic cavity is divided into the same number of rear sub-cavities as that of the speaker units, and each of the speaker units corresponds to one of the rear sub-cavities and is in communication with its corresponding rear sub-cavity. The above structure makes it easier to adjust the acoustic performance and improves the stereo effect of the product.