Expandable Acoustic Reinforcement for Quiet, Stable Speaker Cavities
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing acoustic enhancing materials in speakers face issues such as particle fragmentation, powder shedding, collision noise, and poor heat dissipation, leading to inconsistent acoustic performance and reduced service life, especially in low-temperature environments.
Innovation Solution
An expandable acoustic enhancer comprising expandable acoustic enhancing particles, sheets, or coatings that increase in apparent volume under expansion triggering conditions, providing homogeneous filling and improved heat dissipation, reducing collisions, and enhancing acoustic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If granular acoustic enhancing material particles are used to lower F0 and enhance low frequency performance, then acoustic performance is improved, but particle fragmentation and powder shedding occur due to particle collisions
Solution Approach 1:
The patent combines acoustic enhancing material particles with expandable microspheres to form a composite structure. The expandable microspheres act as a cushioning matrix that prevents direct collisions between acoustic enhancing particles, thereby reducing fragmentation and powder shedding while maintaining the acoustic performance benefits of the particles.
Solution Approach 2:
The expandable microspheres are pre-positioned within the speaker cavity before the acoustic enhancing particles are introduced. These microspheres expand to occupy space and provide a cushioning effect, preventing the acoustic particles from colliding with each other and the cavity walls, thus eliminating the harmful fragmentation effect before it can occur.
2Power
If speaker operating temperature increases to improve sound amplitude, then acoustic output is enhanced, but heat dissipation becomes insufficient due to low thermal conductivity of acoustic enhancing material
Solution Approach 1:
The composite structure combines acoustic enhancing particles with expandable microspheres that have better thermal conductivity properties. The expandable microspheres form a thermal conduction network within the speaker cavity, facilitating heat dissipation from the diaphragm and acoustic particles during high-power operation, thus preventing overheating while maintaining sound amplitude.
3Volume of stationary object
If acoustic enhancing material particles are filled to maximize cavity utilization, then space efficiency is improved, but particle collisions increase causing fragmentation and noise
Solution Approach 1:
The composite of acoustic enhancing particles and expandable microspheres allows for maximum cavity utilization while preventing particle collisions. The expandable microspheres act as spacing elements and cushioning agents, enabling particles to be packed densely without direct contact, thus eliminating collision murmur even at high filling densities.
Solution Approach 2:
The expandable microspheres serve as intermediary elements between the acoustic enhancing particles and the cavity walls. They provide a buffer zone that prevents direct collisions between particles and the cavity structure, eliminating the source of collision murmur while still allowing efficient space utilization.
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 expandable acoustic enhancer achieves consistent acoustic performance, reduces noise, and improves heat dissipation, extending the service life of speakers by ensuring full cavity filling and efficient gas adsorption.
Implementation Method 1
arranging acoustic enhancing materials with gas adsorption and desorption capabilities, such as zeolite and activated carbon, in the speaker cavity
Implementation Method 2
the existing acoustic enhancing material particles usually have low thermal conductivity, which is not conducive to heat dissipation in the speaker
Data Source
AI summary
An expandable acoustic reinforcement member and a manufacturing method therefor and the use thereof. When one or more expansion trigger conditions are applied, an apparent volume of the member is increased, and an internal pore volume is increased. The member is applied to a loudspeaker, and an expansion trigger treatment is performed on the member, so that the apparent volume of the member is increased, and the internal pore volume is increased, such that the acoustic performance of the loudspeaker assembled with the member is improved; meanwhile, pressing is performed between the members, and between the member and a cavity wall of a specific space of the loudspeaker, so that the member is fixed, thereby achieving the effects of eliminating noise in the use process of the loudspeaker and preventing collisions and crushing of the member to generate falling powder, and prolonging the service life of the member.