Speaker Box With Gas Permeable Spacer For Low Frequency
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Solution Overview
Problem
Existing speaker boxes for portable electronics have limited low-frequency acoustic performance due to restricted virtual acoustic chamber volume, which is further exacerbated by increased production costs from additional mold requirements for expanding chamber size.
Innovation Solution
The speaker box employs an ultrasonic welding process to seal the covers and a hot-melt method to fix the gas permeable spacer, allowing for a fully filled sound absorbing chamber that maximizes volume without additional mold structures, enhancing low-frequency sensitivity and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the gas permeable spacer is fixed to the blocking wall by hot-melt method in the irregular structure speaker box, then the spacer is securely attached, but the space utilization is ineffective and the virtual acoustic chamber volume is limited
Solution Approach 1:
The gas permeable spacer transitions from a two-dimensional wall-mounted component to a three-dimensional suspended structure that fills the entire auxiliary sounding chamber volume, maximizing space utilization and virtual acoustic chamber volume simultaneously
Solution Approach 2:
The spacer is divided into multiple segments connected by elastic connecting portions, allowing the structure to adapt to the irregular chamber geometry and fill otherwise unusable spaces while maintaining secure attachment
2Volume of stationary object
If a through hole is established in the upper cover and a cover plate is provided to seal it, then the virtual acoustic chamber volume is increased to some extent, but the improvement effect is small and the production cost is increased
Solution Approach 1:
The spacer structure is merged with the blocking wall through elastic connecting portions, eliminating the need for separate cover plates and additional mold structures while achieving maximum volume utilization
Solution Approach 2:
The elastic connecting portions enable the spacer to self-adjust and secure itself within the irregular chamber geometry without requiring additional sealing components or complex assembly procedures
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
This configuration significantly improves low-frequency acoustic performance by maximizing the virtual acoustic chamber volume and reducing production costs, resulting in enhanced sound pressure levels and sensitivity.
Implementation Method 1
The speaker box employs an ultrasonic welding process to seal the covers
Implementation Method 2
The speaker box employs an ultrasonic welding process to seal the covers and a hot-melt method to fix the gas permeable spacer
Implementation Method 3
A D-BASS virtual sounding chamber is formed by filling the auxiliary sounding chamber with sound absorbing particles, thereby improving the low frequency acoustic performance of the speaker box
Data Source
AI summary
The present disclosure provides a speaker box including a lower cover, an upper cover, a sounding unit, a blocking wall, a surrounding wall, a communication hole and a gas permeable spacer. The sounding unit, the lower cover and the upper cover enclose a rear chamber. The rear chamber is partitioned into a first rear chamber and a second rear chamber by the blocking wall. The sounding unit is accommodated in the first rear chamber. A sound absorbing chamber having a gas permeable spacer is formed in the first rear chamber. The blocking wall has a communication hole that communicates the sound absorbing chamber with the second rear chamber, and the second rear chamber and the sound absorbing chamber are filled with sound absorbing particles. Compared with the related art, the speaker box of the present disclosure has a simple structure and excellent audio performance, especially excellent low frequency performance.