Directional Vehicle Alert System Reducing Noise Pollution
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Solution Overview
Problem
Conventional vehicle horns emit omnidirectional acoustic signals, causing noise pollution and distracting unintended recipients, as they alert intended targets.
Innovation Solution
A directional alert system within a vehicle that uses sensors to determine the driver's direction of interest and transmits focused acoustic or wireless signals via a directional speaker or wireless communication link to specifically alert targets without disturbing others.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional omnidirectional horns are used to alert intended targets, then the alert function is achieved, but noise pollution and distraction to non-targeted individuals increases
Solution Approach 1:
The patent applies local quality by making the acoustic signal directional rather than omnidirectional. The horn system is configured to emit sound primarily in the forward direction (within a specific angle range) while minimizing sound emission in other directions. This allows the alert function to be reliably performed for intended targets in the forward direction while reducing noise pollution and distraction to non-targeted individuals in other directions.
Solution Approach 2:
The patent segments the acoustic field into different directional zones. By using multiple horn elements or adjustable directional beams, the system divides the alert function into specific angular sectors, directing alerts only toward intended targets while leaving other sectors quiet. This segmentation resolves the contradiction by spatially separating the alert function from noise pollution for non-targeted areas.
2Area of stationary object
If omnidirectional honking is used to ensure all nearby individuals receive the alert, then coverage is maximized, but distraction and disturbance to unintended recipients increases
Solution Approach 1:
The system applies local quality by concentrating acoustic energy into specific directional beams rather than distributing it uniformly in all directions. Each directional beam is tailored to cover a specific angular sector where an intended target is located, maximizing alert effectiveness for that sector while minimizing disturbance in other sectors. This resolves the contradiction by making coverage area selective rather than universal.
3Object-generated harmful factors
If directional alert signals are transmitted towards a target region, then noise pollution is reduced, but the system complexity increases
Solution Approach 1:
The patent employs dynamics by making the directional characteristics of the horn system adjustable rather than fixed. The system can dynamically change the direction and width of acoustic beams based on the location of intended targets, allowing optimal noise pollution reduction for different driving scenarios. This dynamic capability achieves noise reduction without requiring a completely complex fixed directional system, as the same hardware can adapt to different situations.
Solution Approach 2:
The directional horn system is designed to be multi-functional, serving both as an alert device for intended targets and as a noise reduction mechanism for non-targets. The same directional acoustic elements that concentrate the alert signal also inherently reduce noise pollution in other directions, eliminating the need for separate systems and reducing overall complexity.
Data Source
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AI summary
A directional alert system within a vehicle is configured to transmit an alert signal towards a specifically targeted area without substantially affecting the acoustic environment in a broader surrounding area. The directional alert system determines the target area by processing sensor data reflects a direction that a driver of the vehicle is looking or facing. The directional alert system then positions an acoustic transducer to generate an acoustic signal towards the direction of interest. The directional alert system may also wirelessly pair with computing devices residing in a target region associated with the direction of interest, and transmit wireless notifications to those computing devices to alert the users of those devices.