Speaker Box Bending Channels for Low-Frequency Reproduction
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Solution Overview
Problem
Typical speaker boxes have a small matching impedance due to their open chamber design, resulting in large vibration amplitudes and weak low-frequency reproduction capabilities.
Innovation Solution
The speaker box incorporates a housing with a bending channel divided by ribs, where the speaker is placed within this channel, allowing for a sound radiation surface area that matches or is smaller than the channel's cross-sectional area, and is configured to split sound transmission into a front and back channel, optimizing impedance matching and reducing vibration amplitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the chamber is designed as an open structure, then the manufacturing is simple and the structure is easy to assemble, but the matching impedance is small resulting in weak low-frequency reproduction
Solution Approach 1:
The bending channel is segmented into multiple sections by transverse partitions, creating a series of connected chambers that increase the effective acoustic path length. This segmentation allows the channel to achieve the electrical length required for low-frequency enhancement while maintaining a compact physical structure that is easy to manufacture.
Solution Approach 2:
The bending channel extends in multiple spatial dimensions rather than a straight line, using longitudinal and transverse sections to create a folded acoustic path. This dimensional approach increases the effective length for low-frequency resonance without proportionally increasing the external dimensions of the speaker box.
2Force
If the speaker has a large vibration amplitude, then the sound radiation is strong, but the power handling capability is reduced and low-frequency reproduction is weakened
Solution Approach 1:
The bending channel changes the acoustic impedance parameters by creating a longer effective path length and multiple reflection points. This impedance transformation allows the speaker to operate at higher power levels with controlled vibration amplitudes, converting the mechanical energy more efficiently into acoustic energy at low frequencies.
3Reliability
If the bending channel length is increased to enhance low-frequency reproduction, then the low-frequency sound production is improved, but the device complexity and space requirements increase
Solution Approach 1:
The bending channel is divided into discrete longitudinal and transverse sections separated by partitions, making the complex structure modular and easier to manufacture. Each segment can be independently formed and assembled, reducing overall manufacturing complexity despite the increased effective length.
Solution Approach 2:
The bending channel is nested within the speaker box housing, with the channel walls formed by the housing structure itself. The transverse partitions and longitudinal sections are integrated into the existing box structure, minimizing additional components and assembly steps.
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 enhances the speaker box's low-frequency reproduction by allowing higher power handling and improved sound radiation, resulting in enhanced tone quality and increased low-frequency sound production.
Implementation Method 1
a bending channel (7) extending along a devious path parallel to the top wall (121)... The first output port (81) and the second output port (82) are disposed at two ends of the bending channel (7) and communicating the bending channel (7) with outside of the housing (1)
Data Source
AI summary
One embodiment of the invention discloses a speaker box having a housing and a speaker accommodated in the housing. The speaker includes a sound radiation surface for generating sound. The housing includes a first and second output ports disposed at one side of the housing for transmitting the sound to outside of the speaker box. The housing includes a plurality of ribs disposed therein and forming a bending channel. The first and second output ports are disposed at two ends of the bending channel. The bending channel is divided into a front channel and a back channel by the speaker. The speaker box is capable of obtaining a better low frequency sound reproduction quality.