Sound Output Device With Ear-Localized Critical Alert Emphasis
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Solution Overview
Problem
Existing navigation systems struggle to effectively distinguish and emphasize critical guidance sounds from other audio sources, such as music, especially when high urgency is required, leading to difficulty in hearing important navigation alerts.
Innovation Solution
A sound output device with an ear speaker that outputs information sounds at higher sound pressure at the operator's ear compared to other positions, and a sound controller that emphasizes these sounds when high urgency is indicated, using techniques like reverberation and high-frequency emphasis based on the necessity level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If information sound is output at high volume to improve audibility, then ease of hearing is improved, but it becomes difficult to distinguish critical alerts from other audio sources
Solution Approach 1:
The patent applies local quality by directing sound energy specifically to the operator's ear position through the ear speaker, creating a localized high sound pressure zone at the ear while maintaining lower sound pressure in other directions. This spatial differentiation allows critical information to be heard clearly without overwhelming other audio sources in the environment.
Solution Approach 2:
The patent introduces a spatial dimension to sound output by using directional ear speakers positioned near the operator's ear. This transforms the sound field from omnidirectional to directional, creating a three-dimensional sound distribution pattern that concentrates acoustic energy where needed while reducing it elsewhere, thereby solving the contradiction between overall volume and information distinction.
2Illumination intensity
If ear speaker is positioned close to the ear to increase sound pressure at the ear, then audibility of information sound is improved, but the device complexity increases
Solution Approach 1:
The ear speaker is designed to serve multiple functions: it provides directional sound output, creates localized sound pressure zones, and can be integrated into existing audio systems. This multi-functionality reduces the need for additional specialized components, thereby managing device complexity while achieving high sound pressure at the ear.
3Ease of operation
If sound pressure at ear position is increased to emphasize critical information, then ease of operation is improved, but loss of information in other directions increases
Solution Approach 1:
The patent segments the sound output function by direction and priority level. Critical information is directed specifically to the operator's ear through the ear speaker, while other audio sources maintain their general distribution pattern. This segmentation allows critical information to be emphasized without completely disrupting the overall sound environment, preserving information availability in different spatial zones.
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
Enhances the audibility and psychological impact of critical navigation information, allowing drivers to easily distinguish and respond to urgent alerts by outputting these sounds with increased volume and emphasis at the ear, reducing cognitive load and improving safety.
Implementation Method 1
The ear speaker outputs the information sound such that sound pressure of the information sound at a position of an ear of the operator is higher than sound pressure at positions other than the position of the ear
Data Source
AI summary
A sound output device includes an acquisition unit, an ear speaker, and a sound controller. The acquisition unit acquires data of an information sound providing an operator with information. The ear speaker outputs the information sound such that sound pressure of the information sound at a position of an ear of the operator is higher than sound pressure at positions other than the position of the ear. The sound controller controls the ear speaker to emphasize the information sound more when the information sound indicates a high degree of necessity for the operator to take action against the information sound than when the information sound indicates a low degree of the necessity.