Speaker Module Resonance Cavity for High-Frequency Sensitivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing speaker modules in portable electronic devices face issues with bulging or dented diaphragms and low high-frequency sensitivity due to compressed front and back cavities, affecting acoustic performance.
Innovation Solution
A speaker module design featuring a resonance cavity formed by a membrane, main magnetic unit, ring body, and lower shell, with an acoustic channel and access to enhance high-frequency sensitivity, eliminating the need for a leakage hole in the back cavity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the front and back cavities are compressed to meet miniaturization requirements, then the device size is reduced, but the diaphragm becomes prone to bulging or denting and high-frequency sensitivity decreases
Solution Approach 1:
The invention divides the back cavity into two separate cavities: a first back cavity and a second back cavity, which are air-tightly isolated from each other. This segmentation allows independent pressure control and volume optimization for each cavity, preventing diaphragm deformation while maintaining compact overall device size.
Solution Approach 2:
The invention changes the pressure parameter by introducing a pressure equalization mechanism (through hole or communication channel) that allows pressure equalization between the two back cavities. This parameter change prevents pressure differential-induced diaphragm bulging or dening while maintaining compact cavity volumes.
2Volume of moving object
If the back cavity volume is reduced for miniaturization, then device size decreases, but high-frequency sensitivity of the speaker deteriorates
Solution Approach 1:
By segmenting the back cavity into two isolated cavities, the invention creates a first back cavity with optimized volume for acoustic performance (maintaining high-frequency sensitivity) and a second back cavity that can be minimized for miniaturization. The air-tight isolation ensures each cavity functions independently for its intended purpose.
Solution Approach 2:
The invention introduces a pressure equalization mechanism (through hole or communication channel) as an intermediary between the two back cavities. This intermediary allows pressure balancing to prevent diaphragm deformation while maintaining the volume optimization benefits for both cavities.
3Reliability
If a leakage hole is added to the shell for back cavity pressure equalization, then diaphragm stability improves, but device complexity and production difficulty increase
Solution Approach 1:
The invention merges the pressure equalization function with existing structural components. The through hole is formed directly in the magnetic circuit system or the communication channel utilizes existing structural spaces, eliminating the need for separate leakage holes in the shell and reducing overall device complexity.
Solution Approach 2:
The magnetic circuit system or existing structural components serve multiple functions: they provide magnetic field generation, structural support, and pressure equalization pathways. This multi-functionality eliminates the need for dedicated leakage holes, simplifying the shell structure and reducing production complexity.
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 improves acoustic performance by enhancing high-frequency sensitivity and simplifies production by eliminating the need for a leakage hole, while maintaining consistent air pressure to prevent diaphragm bulging or denting.
Implementation Method 1
a voice coil located in the magnetic gap for driving the diaphragm for vibrating and emitting sounds
Implementation Method 2
a waterproof and air-permeable membrane. The membrane is attached on the yoke and covers a side of the through hole close to the upper shell
Implementation Method 3
The membrane, the main magnetic unit, the ring body and the lower shell together form a resonance cavity
Data Source
AI summary
A speaker module is disclosed. The speaker module includes a shell, a speaker unit and a ring body. The speaker unit includes a frame, a magnetic circuit system, a vibration system having a diaphragm in a ring shape surrounding the ring body. The magnetic circuit system includes a yoke and a main magnetic unit. A through hole penetrates through the yoke and the main magnetic unit and is covered by a waterproof and air-permeable membrane. The ring body is sandwiched between the main magnetic unit and the shell. The diaphragm is fixed between the frame and the main magnetic unit. The membrane, the main magnetic unit, the ring body and the shell together form a resonance cavity. An access of the ring body communicates the resonance cavity and a front cavity. The speaker module enhances the high-frequency sensitivity, and also saves the space and simplifies the production process.