Speaker Phase Plug Using Sound-Absorbing Material
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Solution Overview
Problem
Conventional phase plugs made of metal or plastic materials are ineffective in preventing sound wave interference, leading to deficiencies in sound quality and vibrational characteristics, particularly in mid/high range frequencies.
Innovation Solution
A speaker device incorporating a deadening phase plug made of sound-absorbing materials like cotton or wool felt, which absorbs and eliminates interference, improving sound quality and vibrational characteristics by reducing chaos in sound waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a phase plug made of metal or plastic material is used, then the structure provides mechanical support and maintains shape, but it fails to effectively prevent sound wave interference and suppress chaos in mid/high range frequencies
Solution Approach 1:
The phase plug is made from sound-absorbing material with porous structure (such as foam material, fibrous material, or porous ceramic material) that enables effective absorption of sound wave interference while maintaining structural integrity. The porous structure allows the material to absorb mid/high range frequency sound waves without reflecting them, thereby suppressing chaos and improving sound quality.
Solution Approach 2:
The invention uses composite material construction where the phase plug combines sound-absorbing properties with structural support capabilities. The phase plug is formed from materials that integrate both mechanical strength requirements and acoustic absorption functions, resolving the contradiction between structural reliability and sound wave interference prevention.
2Ease of manufacture
If a conventional phase plug material is used, then manufacturing is simple and cost-effective, but sound quality and vibrational characteristics are adversely affected
Solution Approach 1:
The phase plug utilizes porous materials (foam, fibrous, or porous ceramic) that can be manufactured through established processes while providing superior sound absorption. These materials are available in various densities and configurations, allowing easy adaptation to different speaker designs without complex manufacturing steps, thus maintaining ease of manufacture while improving vibrational characteristics.
Solution Approach 2:
The invention changes the material parameters of the phase plug from dense non-porous materials to porous materials with controlled pore structures. This parameter change enables the phase plug to absorb sound waves effectively while maintaining manufacturability through standard porous material fabrication techniques.
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 use of sound-absorbing materials in the phase plug effectively minimizes sound wave interference, enhancing sound quality and vibrational characteristics in the mid/high range frequencies, as demonstrated by improved frequency response diagrams.
Implementation Method 1
The deadening phase plug is made of a sound-absorbing material for absorbing and eliminating the interference of sound waves generated by the voice coil and the cone
Data Source
AI summary
A speaker device for improving mid/high-range frequencies includes a magnetic base, a frame annularly mounted to the magnetic base, a cone mounted to an inner side of the frame, a voice coil mounted to the cone and suspended in a gap of the magnetic base, and a deadening phase plug mounted on a central portion of the magnetic base. The magnetic base includes a T-iron, a magnet, and a pole plate. The deadening phase plug is made of a sound-absorbing material for absorbing and eliminating sound waves generated by the voice coil and the cone.