Loudspeaker Module Damping Member for Vibration Symmetry
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Solution Overview
Problem
Existing loudspeaker modules face issues with vibration amplitude asymmetry due to gas pressure imbalances between the front and rear chambers, which cannot be effectively improved by the fixed configuration of leakage holes and damping films.
Innovation Solution
A loudspeaker module design featuring a leakage hole with a damping member comprising a sound-permeable film and a supporting member bonded by adhesive layers, forming a buffer chamber that allows for reflection, eddy, resonance, or stationary wave phenomena to occur, thereby altering the gas flow and improving vibration amplitude symmetry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a leakage hole is provided on the housing to balance gas pressure between front and rear chambers, then gas pressure balance is improved, but vibration amplitude asymmetry deteriorates due to large leakage capacity
Solution Approach 1:
The damping member is selectively positioned at the leakage hole location on the housing, providing localized acoustic resistance only where needed. This allows the leakage hole to maintain its gas pressure balancing function while the damping member locally controls the gas flow characteristics to prevent vibration asymmetry, resolving the contradiction between pressure balance and vibration stability.
Solution Approach 2:
The invention introduces asymmetric gas flow control by adding the damping member to one side (rear chamber side) rather than symmetric treatment of both chambers. This asymmetric modification to the leakage path creates the necessary acoustic resistance to counteract the gas expansion effects and restore vibration amplitude symmetry.
2Stability of the object's composition
If a damping film is added to the leakage hole to adjust leakage capacity, then vibration amplitude symmetry is improved, but device complexity increases
Solution Approach 1:
The damping member integrates multiple functions into a single component: the damping film provides acoustic resistance, the adhesive layers provide mounting functionality, and the overall assembly provides structural support. By combining these elements into one integrated damping member assembly, the invention reduces the number of separate parts compared to alternative solutions that might use multiple discrete components.
Solution Approach 2:
The damping member acts as an intermediary element between the leakage hole and the external environment, mediating the gas flow through acoustic resistance. This intermediary component allows the system to achieve vibration amplitude symmetry without requiring complex active control systems or multiple passive components, simplifying the overall device architecture.
3Ease of manufacture
If fixed configuration of leakage hole and damping film is used, then manufacturing is simplified, but gas flow control flexibility is reduced
Solution Approach 1:
The invention enables parameter adjustment of gas flow characteristics by changing the acoustic resistance properties of the damping film material, thickness, or aperture configuration. These parameter changes allow optimization of gas flow control for different operating conditions while maintaining the simple fixed structural configuration that facilitates easy manufacturing.
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 proposed design enhances vibration amplitude symmetry by altering the gas flow through the leakage hole, potentially leading to more intensive phenomena like reflection, eddy, or resonance, thus improving the performance of the vibrating diaphragm.
Implementation Method 1
one or more of reflection, eddy, resonance and stationary wave phenomena may occur in a space for slowing down the gas flow when the gas flows to the outside via the leakage hole
Implementation Method 2
the gas flows, with eddy or stationary wave phenomenon and the like occurs, to the outside by passing through the damping film via the leakage hole
Implementation Method 3
one or more of reflection, eddy, resonance and stationary wave phenomena may occur in a space for slowing down the gas flow
Data Source
AI summary
Disclosed is a loudspeaker module comprising: a housing; a loudspeaker unit accommodated in the housing and dividing an inner chamber of the loudspeaker module into a front chamber and a rear chamber; a leakage hole formed on the housing at a position corresponding to the rear chamber; and a damping member covering the leakage hole, and being fixed on an outer surface of the housing at an area around the leakage hole, wherein the damping member comprises a sound-permeable damping film and a supporting member bonded together by a first adhesive layer, wherein the supporting member has a first inner hole and is provided on an outer area of the damping film in an annular shape, wherein the first adhesive layer has a second inner hole and is provided on an outer area of the supporting member in an annular shape.