Graphene Conductive Surface Ultrasonic Transducer
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Solution Overview
Problem
Existing ultrasonic audio reproduction systems face challenges in efficiently generating audible sound through non-linear parametric interaction, as they require precise frequency modulation and resonance, often leading to inefficiencies and distortion in sound transmission.
Innovation Solution
The use of graphene for conductive surfaces in ultrasonic emitters, combined with a driver circuit and insulating layers, enables efficient transmission of audio signals by modulating ultrasonic carriers, allowing for self-demodulation and production of audible sound through non-linear air column interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional conductive materials are used in parametric transducers, then the device can operate, but energy wastage and distortion increase due to inferior electrical and thermal conductivity
Solution Approach 1:
The patent changes the material parameter from conventional conductive materials to graphene, which has superior electrical and thermal conductivity. This parameter change directly reduces energy wastage while improving sound quality by enabling more efficient energy transfer and heat dissipation in the parametric transducer.
Solution Approach 2:
The patent employs graphene as a composite material integrated into the transducer structure. Graphene's unique properties enhance the overall performance by reducing energy losses and minimizing distortion, creating a composite system that outperforms conventional materials.
2Productivity
If high power is consumed to produce audible sound through ultrasonic carrier signals, then sound production is achieved, but energy efficiency deteriorates
Solution Approach 1:
The patent changes the electrical conductivity parameter by using graphene, which enables the transducer to achieve the same sound production output with lower power consumption. The superior electrical conductivity of graphene reduces resistive losses, improving overall energy efficiency.
Solution Approach 2:
The patent replaces conventional conductive materials with graphene, utilizing graphene's superior thermal and electrical conductivity properties to substitute for traditional materials. This substitution enables more efficient energy conversion from electrical to acoustic energy, reducing power consumption while maintaining productivity.
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 configuration enhances sound transmission efficiency, reduces distortion, and allows for targeted and directional audio delivery, making it suitable for various applications including isolated sound systems and specialized audio effects.
Implementation Method 1
leveraging graphene's superior electrical and thermal conductivity
Implementation Method 2
leveraging graphene's superior electrical and thermal conductivity
Implementation Method 3
two carrier signals in a non-linear process that occurs in a medium such as air
Implementation Method 4
optimizing the resonant frequency
Data Source
AI summary
An ultrasonic audio speaker includes an emitter and a driver. The emitter can include a first layer having a conductive surface; a second layer having a conductive surface; and an insulating layer disposed between the first and second conductive surfaces, wherein the first and second layers are disposed in touching relation to the insulating layer. The driver circuit can include two inputs configured to be coupled to receive an audio modulated ultrasonic signal from an amplifier and two outputs, wherein a first output is coupled to the conductive surface of the first layer and the second output is coupled to the conductive surface of the second layer. Either one or both of the conductive surfaces of the first and second layers may be graphene.