Ultrasonic Emitter System for Directional 3D Audio
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Solution Overview
Problem
Conventional audio output devices using ultrasonic emitters face challenges in creating a natural three-dimensional sound effect due to the unnatural power distribution of ultrasonic sound columns, which do not diminish with distance like conventional sound waves.
Innovation Solution
The implementation of an ultrasonic emitter system that includes a film with a conductive layer in an electrostatic arrangement, coupled with a transformer and self-bias circuit, to generate ultrasonic signals and adjust the angle of ultrasonic generators/emitters based on listener positioning for optimal sound projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If ultrasonic emitters are used to generate sound columns, then directional sound projection is achieved, but the power distribution becomes unnatural and does not diminish with distance like conventional sound waves
Solution Approach 1:
The patent applies parameter changes by modifying the operating parameters of ultrasonic emitters, specifically using higher frequencies (above 20 kHz) and controlling the amplitude and phase of ultrasonic waves to create sound columns that naturally diminish in power with distance, mimicking conventional sound wave behavior while maintaining directional projection capability
Solution Approach 2:
The system incorporates feedback mechanisms through microphones that detect the actual sound field distribution and feed this information back to the controller, which then adjusts the ultrasonic emitter parameters to optimize power distribution and create more natural-sounding audio output that diminishes appropriately with distance
2Device complexity
If fixed angle ultrasonic generators are used, then device complexity is reduced, but adaptability to different listener positions is compromised
Solution Approach 1:
The patent implements dynamics by making the ultrasonic generator angles adjustable rather than fixed. The system can dynamically change the emission angles of ultrasonic waves based on real-time listener position detection, allowing the same hardware to adapt to different listening scenarios without increasing physical reconfiguration complexity
Solution Approach 2:
The system achieves universality by designing ultrasonic generators that can serve multiple functions - they can be adjusted to different angles, operate at different frequencies, and adapt to various listener positions, making a single device capable of handling diverse audio projection scenarios rather than requiring position-specific hardware configurations
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 enhances the ability to create a realistic three-dimensional sound experience by adjusting the ultrasonic beam direction based on listener position, addressing the issue of unnatural power distribution and improving sound quality.
Implementation Method 1
a film with a conductive layer in an electrostatic arrangement, coupled with a transformer and self-bias circuit, to generate ultrasonic signals
Data Source
AI summary
Methods and systems are provided for audio devices with enhanced directional operations. An example system may include one or more audio output components; one or more sensors configured to generate sensory data relating to a user; and one or more control circuits configured to control the one or more audio output components based on positioning information associated with positioning of the user. The positioning information may be generated or adjusted based on the sensory data, and the controlling may include providing a three-dimensional audio environment according to the user.