Symmetrical Dual Speaker Module Vibration Cancellation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing speaker modules generate unnecessary vibration when emitting sound, leading to noise and interference with the sound effect.
Innovation Solution
A speaker module design featuring a casing with a sound outlet and a speaker unit comprising a bearing base, two symmetrical speaker assemblies, and sound cavities that are symmetrical and of equal size, ensuring stable operation without Z-axis vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional single speaker assembly is used, then the device structure is simple, but the speaker generates unnecessary vibration and noise when emitting sound
Solution Approach 1:
The speaker module is divided into two separate speaker assemblies (first and second speaker assemblies) positioned on opposite sides of the bearing base. Each speaker assembly operates independently within its own sound cavity, allowing the harmful vibrations from each speaker to be separated and counterbalanced rather than combined, thereby reducing overall vibration and noise while maintaining structural simplicity.
2Object-generated harmful factors
If symmetrical dual speaker assemblies are used, then vibration is eliminated, but the device complexity increases
Solution Approach 1:
While the overall layout is symmetrical, the bearing base introduces an asymmetric reference point that allows the two speaker assemblies to be positioned at different locations relative to the center. This asymmetric positioning on a symmetric platform enables vibration cancellation while maintaining manufacturing simplicity and structural balance.
Solution Approach 2:
The two speaker assemblies are positioned symmetrically on opposite sides of the bearing base, creating a counterbalance effect where the vibrations generated by one speaker are offset by the equal and opposite vibrations from the other speaker. This anti-weight principle eliminates net vibration while adding minimal structural complexity through the use of a simple bearing base.
3Ease of manufacture
If speaker assemblies are positioned asymmetrically, then manufacturing is easier, but vibration cannot be eliminated
Solution Approach 1:
The bearing base creates an equipotential reference plane that allows both speaker assemblies to be positioned at equal distances from the center, ensuring symmetric vibration characteristics. This equipotential positioning simplifies manufacturing by providing a clear reference for assembly while simultaneously achieving vibration elimination through balanced symmetry.
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 speaker module remains stable and free from Z-axis vibration, preventing noise interference and maintaining effective sound output when installed on electronic devices.
Implementation Method 1
The first speaker assembly and the second speaker assembly are disposed on the bearing base. The first speaker assembly, the bearing base and the second speaker assembly are arranged in sequence along a longitudinal axis, and the first speaker assembly and the second speaker assembly are symmetrical relative to the bearing base. A first sound cavity is formed between the casing and the first speaker assembly, a second sound cavity is formed between the casing and the second speaker assembly, the first sound cavity and the second sound cavity are communicated with the sound outlet
Data Source
AI summary
A speaker module includes a casing and a speaker unit. The casing has a sound outlet. The speaker unit is arranged in the casing, the speaker unit and the sound outlet are arranged along a transverse axis, and the speaker unit includes a bearing base, a first speaker assembly, and a second speaker assembly. The first and second speaker assemblies are disposed on the bearing base. The first speaker assembly and the second speaker assembly are symmetrical relative to the bearing base. A first sound cavity is formed between the casing and the first speaker assembly, a second sound cavity is formed between the casing and the second speaker assembly, the first sound cavity and the second sound cavity are communicated with the sound outlet, and the first sound cavity and the second sound cavity have the same size and are symmetrical relative to the bearing base.