Ultrasonic Spatial Speaker Layout Using Indoor Sound Reflection
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Solution Overview
Problem
Multi-channel speaker systems require numerous speaker units and complex installations, making them difficult to install in limited spaces and compromising interior design aesthetics, especially when generating spatial sound effects.
Innovation Solution
A speaker device utilizing an ultrasonic speaker that delivers spatial sound effects through reflection in an indoor space, controlled by a processor to identify spatial information, separate audio signals based on frequency, and adjust directivity direction for optimal sound delivery without additional physical speakers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-channel speaker systems are used to generate spatial sound effects, then spatial sound quality is improved, but installation complexity and space occupation increase
Solution Approach 1:
The patent combines multiple speaker functions into a single device by integrating a front speaker and an ultrasonic speaker. The ultrasonic speaker uses acoustic radiation pressure to levitate and position speaker units in mid-air, eliminating the need for separate rear and side speakers while still providing spatial sound effects. This merging approach maintains spatial sound quality while reducing installation complexity and space occupation.
Solution Approach 2:
The patent introduces an ultrasonic speaker as an intermediary device that creates acoustic radiation pressure fields to levitate and position speaker units without physical contact. This intermediary mechanism allows spatial sound effects to be generated without traditional speaker installations, resolving the contradiction between spatial sound quality and installation complexity.
2Reliability
If multiple speaker units are installed for spatial sound effects, then spatial audio performance is improved, but space utilization deteriorates
Solution Approach 1:
The patent transitions from traditional two-dimensional speaker placement (on walls or floors) to three-dimensional spatial positioning by levitating speaker units in mid-air using acoustic radiation pressure. This dimensional change allows spatial audio performance to be achieved without occupying additional floor or wall space, as speakers are positioned in the third dimension (air space).
Solution Approach 2:
The ultrasonic speaker creates virtual speaker positions in mid-air that replicate the function of physical rear and side speakers. These virtual speaker copies provide spatial audio performance without requiring actual physical speaker installations, thus maintaining audio quality while minimizing space occupation.
3Reliability
If traditional speaker systems are installed, then spatial sound effects are achieved, but interior design aesthetics are compromised
Solution Approach 1:
The ultrasonic speaker creates invisible virtual speaker positions in mid-air that replicate the spatial sound effects of traditional speakers. Since these virtual speakers are not physically visible, they maintain interior design aesthetics while still providing the desired spatial sound effects. The acoustic field copies the function of physical speakers without their visual presence.
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
Enables spatial sound effects without occupying additional space, simplifying installation and maintaining aesthetic integrity by using ultrasonic speakers to simulate rear and side speakers, enhancing user experience with precise sound directionality.
Implementation Method 1
an ultrasonic speaker configured to deliver, for a spatial sound effect, a spatial effect audio signal via reflection in an indoor space
Implementation Method 2
A speaker device according to an embodiment may include a front speaker and an ultrasonic speaker configured to deliver, for a spatial sound effect, an audio signal via reflection in an indoor space
Data Source
AI summary
A speaker device includes a front speaker, an ultrasonic speaker that delivers, for a spatial sound effect, a spatial effect audio signal via reflection in an indoor space. The speaker device identifies spatial information of the indoor space, includes, in a first audio signal to be output from the front speaker, a low frequency signal extracted from the spatial effect audio signal included in a audio signal to be output. The low frequency signal is non-directional and a frequency of the low frequency signal is less than or equal to a preset frequency. The speaker device identifies, as a second audio signal, a high frequency signal extracted from the spatial effect audio signal included in the audio signal.