Acoustic Volume Increasing Material Packaging for Loudspeakers
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Solution Overview
Problem
Existing loudspeaker devices face challenges in efficiently increasing acoustic volume without physically enlarging the device, which affects resonance frequency, and existing methods for incorporating acoustically active materials are costly and difficult to implement, especially in miniature devices where space is limited and material insertion is complicated.
Innovation Solution
An acoustic element comprising a container with acoustic volume increasing material, where the container is designed with distinct or identical wall portions to enhance sound transmissibility and containment, allowing for flexible material distribution and easy manufacturing, thereby increasing the perceived acoustic volume without physical expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If acoustic volume increasing material is placed directly in the back volume of the loudspeaker device, then the resonance frequency is lowered and acoustic volume is increased, but the material may leak or cause device damage due to lack of containment
Solution Approach 1:
The patent employs a thin film or flexible container to enclose the acoustic volume increasing material. This thin enclosure provides containment to prevent material leakage and device damage while adding minimal structural complexity. The flexible nature of the shell allows it to conform to the available space in the back volume without requiring rigid structural modifications.
Solution Approach 2:
The patent segments the acoustic volume increasing material into a contained unit (the film or container) that can be independently handled and installed. This segmentation allows the material to be enclosed in a manageable package that prevents leakage while maintaining simplicity of installation and device structure.
2Reliability
If molded gas adsorber is formed from grains of porous material and powdery resin material, then adsorption/desorption characteristics are improved, but manufacturing becomes difficult and expensive
Solution Approach 1:
The patent employs a simple thin film or container structure that can be manufactured at low cost and easily installed. Rather than investing in complex molding processes for durable gas adsorbers, the solution uses inexpensive, easily manufactured containment structures that achieve the required functionality without requiring elaborate manufacturing procedures.
Solution Approach 2:
The patent uses flexible thin films or simple containers to enclose the acoustic material, avoiding the need for complex molded structures. This approach dramatically simplifies manufacturing while still providing the necessary containment and functional characteristics for effective acoustic volume increase.
3Object-generated harmful factors
If the container wall is made from sound-transparent material, then sound transmissibility is improved, but containment effectiveness may be reduced
Solution Approach 1:
The patent employs thin film structures that are inherently flexible and can be made from sound-transparent materials. These thin films provide adequate containment for the acoustic volume increasing material while maintaining high sound transmissibility, as the thin nature of the film minimizes acoustic impedance and allows sound waves to pass through effectively while still providing physical containment.
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 solution effectively decreases the resonance frequency of loudspeaker devices by increasing the virtual acoustic volume, simplifies the incorporation and protection of acoustically active materials, and reduces manufacturing costs while maintaining sound quality and preventing material leakage or device damage.
Implementation Method 1
an acoustic volume increasing material which virtually enlarges the back volume. Hence, by use of an acoustically active material the resonance frequency of the loudspeaker device is lowered
Implementation Method 2
the sound transmissibility of the first wall portion is higher than the sound transmissibility of the second wall portion
Data Source
AI summary
There is provided an acoustic element for placement in a sound path of a loudspeaker device, the acoustic element comprising a container and an acoustic volume increasing material located in the container. In an embodiment, the container comprises wall portions with different physical characteristics. In other embodiments, the walls of the container are made of the same material.