Acoustic Structure Passive Diaphragm Vocal Point Alignment
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Solution Overview
Problem
Existing acoustic structures with passive diaphragms suffer from acoustic retardation and distortion due to differing resonation between the passive diaphragm and loudspeaker unit, limiting sound accuracy and adaptability in various application environments, and require complex design considerations that hinder integration into household items.
Innovation Solution
An acoustic structure with a passive diaphragm located at the rear of the loudspeaker unit, secured by elastic rings, and a radiant tube that aligns sound waves from the passive diaphragm with the loudspeaker unit's vocal point, allowing for synchronized sound emission and reduced vibration, enabling compact audio radiation modules with enhanced bass performance and flexible design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the passive diaphragm is placed on the side of the loudspeaker unit, then the structure is simple, but the sound waves from the passive diaphragm and loudspeaker unit have different resonation resulting in distortion and delay
Solution Approach 1:
The patent positions the passive diaphragm at the rear of the loudspeaker unit along the acoustic axis, creating a three-dimensional arrangement where sound waves from both the loudspeaker cone and passive diaphragm converge at the same vocal point in front of the unit. This spatial arrangement ensures synchronized sound emission and eliminates the distortion and delay issues that occur when components are placed side-by-side.
2Manufacturing precision
If the passive diaphragm is placed at the rear of the loudspeaker unit with aligned radiant tube, then sound accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent integrates the passive diaphragm assembly with the loudspeaker unit by positioning both components along the same acoustic axis and aligning their radiant tubes. The passive diaphragm is secured to the rear casing, and its radiant tube is coaxially aligned with the loudspeaker's radiant tube, creating a unified acoustic system where both components work together to produce synchronized sound waves from a common vocal point.
3Manufacturing precision
If high performance electromagnetic speakers are designed with strict acoustic requirements, then sound quality is improved, but adaptability to different application environments is reduced
Solution Approach 1:
The patent divides the speaker system into modular components: the loudspeaker unit with its electromagnetic driver and the passive diaphragm assembly with its radiant tube. This segmentation allows the passive diaphragm to be independently positioned at the rear of the unit, creating a compact configuration that maintains high sound quality while reducing overall dimensions and improving adaptability to various application environments.
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 solution reduces sound distortion, enhances sound localization, and allows for seamless integration into diverse applications by minimizing casing volume requirements and simplifying sealing technologies, while maintaining sound quality across different casing volumes.
Implementation Method 1
The said passive diaphragm is driven by the vibration caused by the said loudspeaker unit
Implementation Method 2
The sound wave generated by the said passive diaphragm is emitted from the radiation outlet through the radiant tube
Implementation Method 3
One end of the said radiant tube is exposed to the air outside the cone of the said loudspeaker unit and aligned in the direction of the said loudspeaker unit
Data Source
AI summary
This invention provides a kind of acoustic structure that uses passive diaphragm unit, it includes speaker unit, passive diaphragm unit, radiant tube; said passive diaphragm unit is located at the back of the cone of said speaker unit; the speaker unit has radiant tube on the sides; the said radiant tube end which is exposed in the air is located at the periphery of the cone of said speaker unit. It has the same orientation as the speaker unit; the said passive diaphragm unit vibrates when it is driven by the said speaker unit, the sound waves produced by the vibration of the said passive diaphragm unit are emitted by the radiant tube and radiant opening, and share the similar vocal point of the said speaker unit. With this, the sound effect of the full range sound is almost identical to the sound point sources, it also reduces the phase difference between the sound effects produced by the cone of speaker unit and the passive diaphragm unit, further enhanced the sound positioning feature. This invention also provides compact audio radiant module and speaker box which are designed by the structural design above.