Helmet Binaural Audio for Spatial Sound Localization on Two-Wheelers
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Solution Overview
Problem
Cyclists wearing helmets are acoustically isolated from their surroundings, impairing their spatial perception of sounds and making it difficult to identify signals or sounds, and their field of vision is restricted, making it easy to overlook vehicle controls and displays.
Innovation Solution
A method and system that provides a spatially perceptible acoustic signal using stereo headphones in a helmet, where the acoustic signal is generated and output based on the pose of the helmet relative to the bicycle, simulating sound sources in three-dimensional space to enhance spatial awareness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a helmet is worn to protect the cyclist, then safety is improved, but spatial perception of sounds is impaired
Solution Approach 1:
The patent introduces an intermediary system consisting of microphones, processing units, and speakers that mediate between the external acoustic environment and the cyclist's ear. The microphones capture sounds externally, the processing unit analyzes and processes them to determine spatial characteristics, and the speakers reproduce the sounds in a way that preserves spatial perception. This intermediary system allows the cyclist to wear the helmet for protection while still perceiving spatial acoustic information.
2Reliability
If a helmet is worn to protect the cyclist, then safety is improved, but identification of signals and sounds is impaired
Solution Approach 1:
The system implements feedback by continuously monitoring the acoustic environment through microphones, processing the signals to identify important cues, and providing enhanced feedback to the cyclist through the speaker system. The processing unit analyzes acoustic signals to determine their spatial characteristics and enhances them for better identification, creating a feedback loop that compensates for the information loss caused by helmet wearing.
3Ease of operation
If acoustic signals are transmitted through the helmet, then communication is enabled, but spatial localization of sound sources is lost
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different acoustic signals. The system analyzes each sound source's spatial characteristics and processes them differently based on their location. Sounds from different directions are reproduced with appropriate spatial characteristics, allowing the cyclist to maintain spatial localization awareness while still receiving clear communication signals through the helmet's speaker system.
Data Source
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AI summary
The invention relates to a method for providing a spatially perceptible acoustic signal for a rider of a two-wheeled vehicle. The method comprises the following steps: providing an acoustic signal by a two-wheeled vehicle (10); determining the position of a helmet (20) worn by the rider of the two-wheeled vehicle relative to the two-wheeled vehicle (10); processing the acoustic signal depending on the determined position to provide a three-dimensional output signal which constitutes a binaural projection of the acoustic signal; and outputting the output signal via a stereo headset (21) of the helmet (20), wherein the output signal spatially positions a sound source contained in the acoustic signal depending on the determined position, whereby the sound source is spatially locatable by the rider of the two-wheeled vehicle.