Amorphous Titanium-Zirconium Film Diaphragm for Speaker Distortion
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Solution Overview
Problem
Current acoustic diaphragms in speakers fail to meet user demands for high sound quality due to limitations in material properties, leading to sound distortion, particularly at high frequencies.
Innovation Solution
An acoustic diaphragm featuring an amorphous titanium-zirconium film with adjustable composition and ratio, providing high stiffness, low specific density, and high internal damping, is used to prevent sound distortion by reducing partition vibration, enhancing sensitivity, and absorbing gas flow vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coating materials (metal, alloy, oxide, diamond-like carbon) are used on substrate, then the acoustic diaphragm can be manufactured with various properties, but sound distortion occurs particularly at high frequencies due to insufficient stiffness-to-density ratio and internal damping
Solution Approach 1:
The patent applies composite materials by combining titanium and zirconium in specific atomic ratios (Ti: 30-70 at%, Zr: 30-70 at%) to create an amorphous alloy film with optimized mechanical properties. This composite structure achieves high stiffness-to-density ratio and superior internal damping, effectively preventing sound distortion while maintaining acoustic performance.
Solution Approach 2:
The patent employs parameter changes by precisely controlling the atomic composition ratios of titanium and zirconium, as well as adjusting film thickness (0.1-10 μm), to optimize the acoustic properties. By varying these parameters, the invention achieves the desired balance between stiffness, density, and internal damping to eliminate sound distortion.
2Strength
If the acoustic diaphragm uses materials with high stiffness, then high-frequency vibrations are reduced, but the material density increases which reduces sensitivity
Solution Approach 1:
The amorphous titanium-zirconium composite material achieves an optimal balance between stiffness and density. The specific atomic ratios (Ti: 30-70 at%, Zr: 30-70 at%) create a material structure that provides high stiffness-to-density ratio, simultaneously satisfying both high-frequency vibration reduction and sensitivity requirements.
Solution Approach 2:
By adjusting the atomic composition parameters and film thickness, the invention optimizes the stiffness-to-density ratio. The controlled variation of Ti and Zr ratios allows tuning of mechanical properties to achieve the desired balance between stiffness and specific density for optimal acoustic performance.
3Loss of energy
If the acoustic diaphragm uses materials with high internal damping, then vibration absorption is enhanced, but the manufacturing complexity increases due to precise composition control requirements
Solution Approach 1:
The amorphous titanium-zirconium composite material inherently provides high internal damping properties through its disordered atomic structure. This composite design achieves superior vibration absorption capability while the established sputtering process makes the manufacturing feasible with controlled composition ratios.
Solution Approach 2:
The invention manages manufacturing complexity by optimizing the deposition parameters including atomic ratios (Ti: 30-70 at%, Zr: 30-70 at%) and film thickness (0.1-10 μm). These controlled parameter changes enable precise tuning of internal damping properties while maintaining manufacturability through standard sputtering 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 amorphous titanium-zirconium film effectively prevents sound distortion in speakers by reducing high-frequency vibrations, improving sensitivity, and enhancing vibration absorption, resulting in improved sound quality.
Implementation Method 1
an amorphous titanium-zirconium film which has a high stiffness, a low specific density, or a high internal damping
Implementation Method 2
When an electric current passes through a wire coil, the wire coil generates a magnetic pole, and then the wire coil and a magnet repel or attract by their own poles
Data Source
AI summary
The present invention provides an acoustic diaphragm including: a cone and a surround mounted around the cone; wherein an amorphous titanium-zirconium film is formed on a cone substrate, a surround substrate, or both of the substrates. The present invention also provides a speaker containing the acoustic diaphragm.