Acoustic Structure Vibration Generation for Spatial Sound Perception
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Solution Overview
Problem
Conventional acoustic apparatuses require multiple microphones and speakers, along with FIR filters, equalizers, and amplifiers, leading to high costs and time-consuming installations, as well as the need for expertise in calculating emission characteristics.
Innovation Solution
An acoustic apparatus comprising a signal acquisition portion, a signal processing portion, and a vibration generation portion attached to a plate-like acoustic structure with cavities, which generates vibrations corresponding to sound signals to create a larger space effect without the need for multiple speakers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple microphones, speakers, FIR filters, equalizers, and amplifiers are installed to achieve spatial sound perception, then the sound quality and spatial effect are improved, but the installation cost and system complexity increase significantly
Solution Approach 1:
The patent extracts the core function of sound emission from complex speaker systems and concentrates it into a single vibration generation portion attached to an acoustic structure. This eliminates the need for multiple speakers, FIR filters, equalizers, and amplifiers, thereby reducing system complexity while maintaining sound quality through the specialized acoustic structure design
Solution Approach 2:
The acoustic structure with cavity serves multiple functions: it acts as both the sound emission medium and the reverberation chamber. The vibration generation portion integrated with the acoustic structure combines the functions of speaker and acoustic treatment, reducing the overall number of components needed in the system
2Illumination intensity
If multiple microphones and speakers with FIR filters are installed to extend reverberation time and enhance reflected sound, then the spatial perception is improved, but the installation cost increases
Solution Approach 1:
The patent merges the vibration generation portion directly with the acoustic structure, creating an integrated unit that combines the functions of speaker and reverberation chamber. This consolidation reduces the number of separate components needed while achieving the desired spatial perception effect through the cavity design
3Illumination intensity
If speakers are installed according to pre-calculated emission characteristics to achieve proper sound distribution, then the sound quality is improved, but the installation time and expertise requirement increase
Solution Approach 1:
The acoustic structure is designed with inherent acoustic properties through its cavity configuration, allowing it to self-regulate sound emission characteristics without requiring external calculation or adjustment. The structure itself provides the necessary acoustic treatment, eliminating the need for expertise in emission characteristic calculation during installation
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 apparatus reduces installation costs and time, allowing listeners to perceive sound as originating from a larger space without requiring extensive expertise or complex installations, while enhancing the reverberation effect and sound volume.
Implementation Method 1
a vibration generation portion that is attached to the acoustic structure, in which the vibration generation portion generates vibration corresponding to the signal acquired by the signal acquisition portion and transmits the vibration generated to the acoustic structure
Implementation Method 2
the acoustic structure emits sound through transmission of the vibration from the vibration generation portion
Implementation Method 3
a reverberation time period is extended and a level of initial reflected sound is enhanced. As a result, a listener can perceive as if the sound is produced in a larger space than an actual space
Data Source
AI summary
Provided is an acoustic apparatus capable of causing a sensation that a sound is produced in a larger space than reality, without requiring an excessive cost and time-consuming installation. The sound collected by a microphone is converted to an electrical signal, and a reflected sound component is extracted by a signal processing portion. The reflected sound component thus extracted is amplified by an amplifier, and the reflected sound component thus amplified vibrates transducers attached to a back-side board surface of each acoustic structure, whereby reflected sound is emitted from all faces including front-side board surface and the back-side board surface. A player can thus naturally perceive as if the space where he stays is expanded.