Dynamic Sound Masking via Networked Emitters
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Solution Overview
Problem
Large-scale audio systems struggle to effectively target specific areas while minimizing noise in other areas, presenting a challenge in workplace and public environments where audio coverage spans multiple floors and rooms.
Innovation Solution
A networked audio system with controllers and emitters that select specific frequency ranges and output levels to emit sound masking signals, reducing noise levels in targeted areas by distributing emitters throughout the environment and using sensors to detect noise levels and adjust masking signals accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If audio is emitted across multiple floors and areas to provide comprehensive coverage, then audio coverage area is improved, but noise control in specific areas deteriorates
Solution Approach 1:
The audio system is divided into multiple independent emitter units distributed throughout the building, each capable of being controlled independently. This segmentation allows the system to provide comprehensive coverage across multiple floors while enabling selective activation of specific emitters to control noise in particular areas.
Solution Approach 2:
Each emitter is equipped with local sensors that detect noise conditions in its specific vicinity. This local quality approach allows the system to adapt audio emission characteristics to local conditions, providing comprehensive coverage while maintaining noise control in specific areas based on real-time local measurements.
2Object-affected harmful factors
If sound masking signals are emitted at high levels to reduce noise, then noise reduction effectiveness is improved, but audio output level in unwanted areas worsens
Solution Approach 1:
Sensors continuously monitor noise levels in each area and provide feedback to the controller. The controller adjusts the frequency and output level of masking signals based on this feedback, ensuring effective noise reduction while minimizing energy consumption by activating emitters only when and where needed.
Solution Approach 2:
The system dynamically adjusts the operating state of each emitter based on real-time conditions. Emitters can be selectively activated or deactivated, and their output levels can be modulated, allowing the system to maintain noise reduction effectiveness while optimizing energy usage by avoiding unnecessary audio output in areas where masking is not required.
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 provides effective sound masking, increasing privacy and reducing distractions by making human voices and sounds difficult to discern beyond a certain distance, while also allowing for ambient audio management and directed audio transmission.
Implementation Method 1
a plurality of emitters disposed throughout an environment, and a controller in communication with the plurality of emitters via a communication medium, and the controller selects a frequency and output level to emit a sound from the plurality of emitters
Data Source
AI summary
An example process may include identifying an area of an environment to emit one or more sound masking signals, determining a noise level of one or more surrounding areas adjacent to the area, selecting one or more frequency ranges and respective amplitudes of the one or more sound masking signals to apply to the area based on the noise level, and emitting the masking signals via one or more emitters disposed in the area.