Speaker Box Front Cover With Through Hole For Resonance Control
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Solution Overview
Problem
The limited size of speaker boxes results in a narrow sound output channel, leading to poor sound quality due to the proximity of the front cover and housing, causing piano sound resonance.
Innovation Solution
The speaker box design includes a support wall within the housing to extend the sound output area by having a front cover with a through hole that runs through both the main body and side edge portions, allowing sound to be output from both areas, and optionally features a damping mesh and additional through holes arranged in an array for improved sound output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the speaker unit is loaded into the housing with limited overall size, then the speaker box can be compact and portable, but the distance between the front cover and housing becomes too small, resulting in a narrow sound output channel
Solution Approach 1:
The front cover is designed with a side edge portion that bends and extends toward the vibration system, creating a three-dimensional structure that expands the sound output channel in the lateral direction. This dimensional transformation allows the sound output area to be increased without increasing the overall volume of the speaker box, effectively resolving the contradiction between compact size and sufficient sound output channel area.
2Volume of moving object
If the front cover is positioned close to the housing to reduce overall size, then the speaker box becomes more compact, but piano sound resonance occurs due to the narrow sound output channel
Solution Approach 1:
By extending the side edge portion of the front cover toward the vibration system, the sound output channel is expanded in the lateral dimension. This dimensional change increases the distance between the vibration system and the front cover's blocking surface, reducing acoustic pressure and preventing piano sound resonance while maintaining the compact overall size of the speaker box.
3Ease of manufacture
If the through hole is positioned away from the vibration system to maintain structural simplicity, then manufacturing is easier, but sound output quality deteriorates
Solution Approach 1:
The front cover is segmented into distinct functional portions: a main body portion located above the vibration system for primary sound output, and a side edge portion extending toward the vibration system with through holes for enhanced sound output. This segmentation allows the through holes to be positioned optimally close to the vibration system for improved sound quality while maintaining manufacturing feasibility through modular design.
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 design enhances sound output smoothness and prevents piano sound resonance, resulting in improved sound quality within the constraints of the speaker box's overall size.
Implementation Method 1
sound produced by the speaker unit may be outputted from the main body portion and the side edge portion
Implementation Method 2
a side edge portion bending and extending from the main body portion toward the vibration system
Data Source
AI summary
Provided is a speaker box, including a housing having a receiving space and a speaker unit received therein. The housing extends into the receiving space to form a support wall. The speaker unit is supported by and fixed to the support wall. The housing has a sound output hole. The speaker unit includes a frame, a vibration system and magnetic circuit unit fixed to the frame, and a front cover covering the frame. The front cover is supported by and fixed to the support wall. The front cover includes a main body portion located above the vibration system, a side edge portion and a fixed portion covering the frame. The fixed portion is supported by and fixed to the support wall. The front cover has a through hole running through both the main body portion and the side edge portion. The speaker box has excellent sound quality.