Acoustic Device Back Volume Partitioning
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Solution Overview
Problem
The existing speaker boxes often have a smaller back volume, which negatively impacts the low-frequency sound quality due to the imbalance in the front and back volumes, leading to suboptimal audio performance in consumer electronics.
Innovation Solution
The design of the speaker box includes an enlarged back volume by utilizing a barrier to separate the space behind the sound radiation surface into an extra volume that communicates with the back volume, effectively increasing the back volume and improving low-frequency sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the front volume is made larger to improve sound radiation, then the back volume becomes relatively smaller, but this worsens the low-frequency sound quality
Solution Approach 1:
The patent divides the internal space into distinct front volume and back volume regions using a partition structure. This segmentation allows independent optimization of each volume - the front volume can be enlarged for better sound radiation while the back volume is separately enhanced with a bass reflex port to maintain low-frequency quality, resolving the contradiction between the two volume requirements
2Volume of stationary object
If the back volume is enlarged to improve low-frequency sound quality, then the overall device size increases, but this conflicts with compact device requirements
Solution Approach 1:
The patent implements a nested configuration where the bass reflex port is integrated within the back volume region, and the partition structure is nested within the housing cavity. This nesting approach allows the back volume to be enlarged for improved low-frequency performance while maintaining a compact overall device footprint, as the additional volume is efficiently utilized within the existing device envelope
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 enlarged back volume enhances the low-frequency sound quality by redistributing space from the sound channel, resulting in improved audio performance in consumer electronics devices.
Implementation Method 1
a sound radiation surface is provided for generating sound. Generally, the sound radiation surface is a membrane or a diaphragm which is activated by an electrified voice coil. While activated, the sound radiation surface vibrates and produces audible sounds
Data Source
AI summary
One embodiment of the invention discloses an acoustic device having a housing and a speaker unit accommodated in the housing. The speaker unit forms a front volume and a back volume together with the housing. The housing includes an extra volume communicating with the back volume and a sound channel communicated with the front volume. The extra volume is isolated from the sound channel. The invention provides an acoustic device with enlarged back volume for improving low frequency sound quality.