Planate Parametric Emitter Resonance Matching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing parametric loudspeaker technologies face challenges in achieving high volume outputs without distortion, as they often require intense signal levels that exceed the physical limitations of the emitter devices, leading to high distortion or failure, and are not suitable for commercial applications requiring significant sound levels.
Innovation Solution
A parametric speaker system utilizing a generally planate radiating element with a mechanical resonance matching the ultrasonic output frequency of an emitter, coupled with a mechanical stiffening system to enhance resonance, and an electronically coupled signal processing system to deliver modulated ultrasonic signals, allowing for efficient production of audible sound in a fluid medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the emitter is driven at intense levels to achieve volume outputs of useful magnitude, then the sound volume is improved, but the distortion increases and emitter failure rate increases
Solution Approach 1:
The patent applies mechanical vibration by utilizing the resonant frequency of the radiating element to amplify ultrasonic wave generation. By driving the radiating element at its resonant frequency, the system achieves enhanced vibration efficiency and sound volume output without requiring excessively intense signal levels that would cause emitter failure or distortion.
Solution Approach 2:
The patent changes the operating parameters by tuning the radiating element's mechanical resonance to match the emitter's output frequency. This parameter adjustment optimizes the coupling between the emitter and radiating element, improving power transfer efficiency and reducing the intensity levels required for effective sound generation, thereby avoiding distortion and emitter failure.
2Power
If the emitter is driven at intense levels to achieve volume outputs of useful magnitude, then the sound volume is improved, but the distortion increases
Solution Approach 1:
The patent utilizes mechanical vibration at resonant frequency to efficiently transfer energy from the emitter to the radiating element. This resonant vibration mechanism improves power transfer and sound volume generation while operating at lower intensity levels than conventional systems, thereby reducing distortion in the emitted sound.
Solution Approach 2:
The patent optimizes the system by adjusting the mechanical resonance parameter of the radiating element to match the emitter's frequency output. This parameter tuning maximizes energy transfer efficiency and sound quality at lower driving intensities, preventing distortion while achieving useful sound volume levels.
3Power
If conventional emitter systems are used to achieve high volume levels, then the sound output is improved, but the emitter physical limitations are exceeded
Solution Approach 1:
The patent introduces a radiating element as an intermediary component between the emitter and the surrounding medium. This radiating element, when resonant with the emitter frequency, acts as a mechanical amplifier that transfers ultrasonic energy more efficiently, achieving high sound output without exceeding the emitter's physical power limitations.
Solution Approach 2:
The patent employs mechanical vibration at resonant frequency to enhance the coupling between the emitter and radiating element. This resonant mechanical interaction amplifies the ultrasonic wave generation process, enabling high sound output levels while keeping the emitter operating within its physical 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 system effectively produces high-quality, directional audible sound with reduced distortion and increased durability, enabling applications that require significant sound output while maintaining emitter integrity.
Implementation Method 1
Non-linear transduction, such as a parametric array in air, results from the introduction of sufficiently intense, audio modulated ultrasonic signals into an air column. Self demodulation, or down-conversion, occurs along the air column resulting in the production of an audible acoustic signal.
Implementation Method 2
The radiating element is physically configured to have a mechanical resonance that substantially matches the output frequency of the emitter.
Implementation Method 3
a generally planate radiating element, suitable for radiating ultrasonic vibrations into a nonlinear medium
Implementation Method 4
Whether the emitter is a piezoelectric emitter or PVDF film
Implementation Method 5
an emitter, having an output frequency in the ultrasonic audio range... delivering to the emitter an ultrasonic signal having an audio signal modulated thereon
Data Source
AI summary
A parametric speaker comprises a generally planate radiating element, suitable for radiating ultrasonic vibrations into a fluid medium, and an emitter, having an ultrasonic output and/or resonant frequency, the emitter being intimately coupled to the radiating element. The radiating element is physically configured to have a mechanical resonance that substantially matches the output and/or resonant frequency of the emitter.