Rotatable Reflective Panels for Dynamic Acoustic Control
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Solution Overview
Problem
Current systems for controlling architectural acoustics in real-time are limited by the inability to dynamically modify passive acoustic properties of physical surfaces, such as sound reflection and absorption, which are essential for adapting to varying sound sources and levels in multi-use venues.
Innovation Solution
A dynamic acoustic panel device and system featuring a support with a front opening, an absorbent panel, and a reflective surface comprising an array of rotatable panels that can adjust from zero to ninety degrees, allowing for continuous variation between reflection and absorption, controlled by sensors and a computerized unit to adjust the angle based on sound pressure levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed passive acoustic panels are installed to control reverberation time, then the acoustic properties for a specific use are optimized, but the acoustic characteristics cannot be modified in real-time for different uses
Solution Approach 1:
The patent applies the dynamics principle by making the acoustic panel system adjustable and reconfigurable. The panel includes movable reflective surfaces that can be repositioned to different locations on the panel surface, allowing the acoustic properties to be dynamically changed between different uses (e.g., from high reverberation for music to low reverberation for speech). This transforms a static acoustic treatment into a dynamic system that can adapt to various acoustic requirements.
Solution Approach 2:
The patent applies segmentation by dividing the reflective surface into multiple separate panels or elements that can be independently positioned. Instead of a single fixed reflective surface, the system uses multiple smaller reflective panels that can be moved to different locations, enabling fine-grained control over acoustic reflections and allowing the system to achieve different acoustic configurations for different uses.
2Adaptability or versatility
If movable acoustic panels are used to re-tune room acoustics for different performances, then acoustic adaptability is improved, but the switching time between configurations is excessive
Solution Approach 1:
The patent applies preliminary action by pre-positioning multiple reflective panels at predetermined locations on the panel surface. These panels are prepared in advance at various positions, and during configuration changes, operators simply need to move panels between pre-established positions rather than creating new configurations from scratch. This reduces the time required to re-tune acoustics for different performances.
Solution Approach 2:
The system enables rapid reconfiguration through dynamic movement mechanisms that allow panels to be quickly repositioned. The design facilitates fast switching between acoustic configurations by using movable rather than fixed panel arrangements, significantly reducing the time required to adapt the acoustic environment for different uses.
3Adaptability or versatility
If heavy drapes or movable panels are physically changed to match anticipated use, then acoustic properties are adjusted, but the process is time-consuming and lacks efficiency
Solution Approach 1:
The patent replaces static, manually moved heavy drapes with a dynamic system featuring lightweight reflective panels that can be efficiently repositioned. The movable panel design enables rapid adjustment of acoustic properties without the time-consuming process of physically handling heavy materials, thereby improving reconfiguration efficiency and productivity.
Solution Approach 2:
The patent uses multiple smaller, lighter reflective panels instead of single heavy drapes or large fixed panels. These smaller panels are easier and faster to move and reposition, allowing rapid acoustic reconfiguration. The system trades the use of heavy, durable but slow-to-move materials for lighter, more maneuverable panels that enable efficient acoustic adjustments.
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 precise, real-time control of acoustic properties, effectively varying the absorption and reflection levels to optimize reverberation time and sound quality in spaces, improving listener comfort and clarity across different usage scenarios.
Implementation Method 1
The reflection of sound and its eventual decay is referred to as the reverberation time of a space. To control the reverberation rate of a space, acoustic engineers place reflective or absorptive panels in strategic locations within a space.
Implementation Method 2
The level of reflectivity or absorption of these panels is determined by standardized testing which establishes the coefficient of absorption for various materials based on their ability to absorb sound across a spectrum of frequencies.
Data Source
AI summary
A dynamic passive acoustic panel device comprises an enclosure having a front opening, an absorbent panel of sound absorbent material mounted in the enclosure behind the front opening, and a reflective surface mounted in the front opening in front of the absorbent panel. The reflective surface comprises a tessellated array of reflective panels of matching shape arranged in a series of rows, each row being mounted for rotation about a central axis so as to vary the angle of inclination of the reflective panels in each row relative to the absorbent panel from zero degrees to ninety degrees to the absorbent panel, so as to vary the reflection and absorption characteristics of the panel device. A control system controls rotation of the rows of reflective panels, so as to vary the reflection and absorption levels between maximum reflection and maximum absorption based on desired acoustic properties of a space in which the panel device is located.