Honeycomb Diaphragm Loudspeaker Bandwidth Extension
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Solution Overview
Problem
Traditional mid-range loudspeakers face challenges in extending their bandwidth beyond 10 KHz and improving high-frequency directivity.
Innovation Solution
A mid-range loudspeaker design featuring a diaphragm composed of a honeycomb plate with through holes and covering films, integrated with a magnetic circuit system, including a U-yoke, main and secondary magnetic steels, and a voice coil, which enhances high-frequency response and directivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional mid-range loudspeaker design is used, then the bandwidth can reach 10 KHz, but it is difficult to extend the bandwidth to 20 KHz and improve directivity
Solution Approach 1:
The patent employs a porous honeycomb plate as the diaphragm structure, which allows high-frequency sound waves to pass through while maintaining directional control. The porous structure enables the diaphragm to effectively radiate frequencies up to 20 KHz by allowing acoustic energy to propagate through the honeycomb cells, thereby extending bandwidth while maintaining manageable directivity characteristics
Solution Approach 2:
The patent uses a composite diaphragm structure consisting of a honeycomb plate combined with covering films (such as aluminum or Kevlar). This composite construction provides the mechanical strength needed for high-frequency operation while the honeycomb core enables acoustic transmission, achieving extended bandwidth to 20 KHz without compromising structural integrity or directivity control
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 design extends the loudspeaker's bandwidth to 20 KHz and improves high-frequency directivity, as demonstrated by improved frequency response curves compared to traditional mid-range loudspeakers.
Implementation Method 1
a voice coil connected to the diaphragm, the diaphragm comprises a honeycomb plate having a front surface and a back surface, and covering films respectively covering the front surface and the back surface of the honeycomb plate
Implementation Method 2
the honeycomb plate is provided with a plurality of holes... the holes of the honeycomb plate are through holes that go though the honeycomb plate from the front surface to the back surface thereof
Data Source
AI summary
A mid-range loudspeaker, including a frame, a diaphragm arranged on the frame, a magnetic circuit system arranged on the frame, and a voice coil connected to the diaphragm. The diaphragm includes a honeycomb plate having a front surface and a back surface. Covering films respectively cover the front surface and the back surface of the honeycomb plate. The honeycomb plate is provided with a plurality of holes.