Vehicle Acoustic Warning System Using Psychoacoustic Parameters
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Solution Overview
Problem
Electric vehicles often fail to alert other road users to their presence due to low or unfamiliar acoustic emissions, leading to potential dangers in traffic situations, and existing noise designs do not effectively utilize psychoacoustic effects to enhance driver reaction times and vehicle-user interaction.
Innovation Solution
A vehicle system that emits natural or archaic noise patterns with specific psychoacoustic effects, such as varying loudness and discomfort, to intuitively alert drivers and users of potential dangers, while also providing calming sounds to reduce stress and enhance vehicle integration into urban noise landscapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If electric vehicles use low acoustic emissions, then energy consumption is reduced, but road users cannot perceive the vehicle presence in time
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting acoustic emission levels based on driving situation, location, and detected road users. The system transitions from constant low emission to situation-dependent variable emission, optimizing both energy consumption and safety by emitting noise only when and where needed.
Solution Approach 2:
The patent introduces an intermediary system (acoustic warning system with psychoacoustic analysis) that mediates between the electric vehicle's low-emission operation and road user perception needs. This intermediary analyzes environmental factors and generates appropriate acoustic signals to bridge the perception gap.
2Reliability
If synthetic noise patterns are added to electric vehicles, then vehicle presence is communicated, but the sounds are perceived as alien and unfamiliar
Solution Approach 1:
The patent transforms synthetic noise patterns into natural sound patterns by changing acoustic parameters to match familiar natural sounds. This includes adjusting frequency spectra, temporal patterns, and spectral composition to resemble natural phenomena, thereby eliminating the alien perception while maintaining effective communication.
Solution Approach 2:
The patent copies natural sound patterns (water flow, wind, animal sounds) to replace synthetic noise patterns. By replicating the characteristics of familiar natural sounds, the system achieves effective presence communication without the negative psychoacoustic effects of artificial-sounding noises.
3Loss of time
If natural sound patterns are used for warning, then driver reaction time is improved, but stress and fatigue increase
Solution Approach 1:
The patent applies local quality by using different sound patterns for different functions: alarming natural sounds (thunder, animal cries) for danger warnings to trigger fast reaction, and calming natural sounds (water flow, wind) for general presence communication and stress reduction. This localized application of different sound qualities optimizes both reaction time and stress levels.
Solution Approach 2:
The patent implements dynamics by dynamically selecting and switching between different natural sound patterns based on the situation. The system transitions from calming sounds during normal operation to alarming sounds only when danger is detected, thereby maintaining fast reaction capability while minimizing overall stress and fatigue.
Data Source
AI summary
The invention relates to a vehicle with at least one noise source. According to the invention, at least one noise source is installed in or on the vehicle, which generates a noise defined by five psychoacoustic parameters, namely its sharpness, roughness, fluctuation intensity, modulation frequencies, and dominant specific loudnesses in Bark frequency groups, each of which lies within a 5-dimensional spatial region limited by specific parameter specifications.