Folded-Ring Speaker Venting for Back Pressure Relief
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Solution Overview
Problem
Existing speakers, particularly headphones, face challenges in achieving high output performance due to the structure of the diaphragm and supporting structures, which affect sound quality and user comfort.
Innovation Solution
The speaker design includes a diaphragm with a folded-ring region and a magnetic circuit component, featuring specific air holes and a pressure relief hole, along with a bracket arrangement that enhances sound transmission and reduces back pressure, allowing for high-frequency vibrations and improved sound output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional diaphragm structure is used, then the speaker structure is simple, but the output performance and sound quality are limited
Solution Approach 1:
The diaphragm is divided into a main-body region and a folded-ring region with distinct functions. The folded-ring region includes multiple sections (first inclined section, second inclined section, first connecting section, second connecting section) that are segmented to achieve specific acoustic goals while maintaining overall structural integrity.
Solution Approach 2:
The folded-ring region introduces three-dimensional folding structures with specific inclination angles (5°-30°) and geometric ratios (0.35-0.4 for arc-shaped section height-to-span ratio). This dimensional transformation enables the diaphragm to achieve high-frequency split vibrations and improve sound output without simply increasing size.
2Reliability
If air holes are added to the bracket, then back pressure is reduced and sound transmission is improved, but the bracket structure becomes more complex
Solution Approach 1:
Air holes are strategically positioned on the bracket at specific locations to optimize sound transmission from the back surface of the diaphragm to the pressure relief hole. The non-uniform distribution of air holes creates local quality variations that enhance acoustic performance without requiring complete structural redesign.
Solution Approach 2:
The air holes are arranged asymmetrically on the bracket, with different positions and sizes optimized for specific acoustic paths. This asymmetric arrangement allows efficient sound transmission while maintaining structural simplicity compared to symmetric designs.
3Reliability
If the folded-ring region with inclined sections is implemented, then high-frequency vibration performance is improved, but manufacturing precision requirements increase
Solution Approach 1:
Specific parameter ranges are defined for the folded-ring region to optimize performance while considering manufacturability: inclination angles of 5°-30°, height-to-span ratios of 0.35-0.4 for arc-shaped sections, and dome height-to-span ratios of 0.1-0.3. These parameter specifications balance performance requirements with manufacturing capabilities.
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 achieves enhanced sound quality and user comfort by optimizing sound transmission and reducing back pressure, thereby improving the overall output performance of the speaker.
Implementation Method 1
the coil may drive the diaphragm to vibrate to generate sound after the coil is energized
Implementation Method 2
Sound from a back surface of the diaphragm may be transmitted to the pressure relief hole through the plurality of air holes
Data Source
AI summary
One or more embodiments of the present disclosure provide a speaker. The speaker may include a diaphragm, a magnetic circuit component, a coil connected to the diaphragm, a bracket arranged around the magnetic circuit component, and a housing. At least part of the coil may be arranged in a magnetic gap formed by the magnetic circuit component, and the coil may drive the diaphragm to vibrate to generate sound after the coil is energized. The diaphragm may include a main-body region and a folded-ring region surround the main-body region. The bracket may be connected to a portion of the folded ring region away from the main-body region, and a plurality of air holes may be provided on the bracket. A pressure relief hole may be provided on the housing. Sound from a back surface of the diaphragm may be transmitted to the pressure relief hole through the plurality of air holes, and the plurality of air holes may at least include a first air hole and a second air hole. A distance from a center of the first air hole to a center of the pressure relief hole may be greater than a distance from a center of the second air hole to the center of the pressure relief hole, and an area of the first air hole may be greater than an area of the second air hole.