Acoustic System for Seamless Audio Destination Switching
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Solution Overview
Problem
Users wearing terminal devices with earhole authentication functions face inconvenience when switching audio sources between their personal devices and vehicle speakers, requiring manual operation to select the desired audio output.
Innovation Solution
An acoustic system comprising a first terminal device worn on the ear, an onboard device in the vehicle, and a second terminal device that automatically determines the sound data destination based on user authentication and predetermined conditions, allowing seamless switching between personal device and vehicle speaker audio without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual switching operation is required to change audio output destination between terminal device and vehicle speaker, then user can precisely control audio source, but user convenience deteriorates due to additional operation steps
Solution Approach 1:
The system automatically determines the audio output destination based on sensor-detected user state (sitting, standing, moving) without requiring manual user input. The terminal device performs self-service by autonomously switching between vehicle speaker and earphone output based on the user's physical state, thereby improving ease of operation while maintaining precise control through intelligent automation
Solution Approach 2:
The system continuously monitors user state through sensors (accelerometer, gyroscope, proximity sensors) and uses this feedback to dynamically adjust audio output destination. When the sensor detects the user is moving or has left the vehicle, the system automatically switches audio output from the vehicle speaker to the earphone, creating a closed-loop control system that responds to user behavior in real-time
2Productivity
If automatic audio destination switching is implemented based on sensor detection, then user convenience improves, but system complexity increases
Solution Approach 1:
The terminal device integrates multiple functions including audio playback, sensor detection (accelerometer, gyroscope, proximity), and automatic destination switching control within a single device. By making the terminal device multi-functional, the system achieves automatic audio switching efficiency without proportionally increasing overall system complexity, as these functions are consolidated in the device the user already carries
Solution Approach 2:
The system merges the audio control function with the vehicle's existing sensor system and terminal device capabilities. Instead of adding a separate complex audio switching system, the invention combines the terminal device's existing sensors and processing power with the vehicle's audio system, thereby achieving automatic switching efficiency while minimizing the increase in overall system complexity
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 user convenience by automatically determining the audio output destination based on authentication and conditions, enabling seamless audio switching when boarding a vehicle without requiring user operation.
Implementation Method 1
an earhole sound collecting unit configured to collect echo sound from the user's earhole in response to the authentication sound
Data Source
AI summary
An acoustic system includes: a first terminal device including a first-terminal sound emitting unit, an earhole sound collecting unit configured to collect earhole echo sound, and a first-terminal control unit configured to perform authentication between the first terminal device and a user based on the echo sound collected by the earhole sound collecting unit; an onboard device including an onboard-device sound emitting unit and an onboard-device control unit configured to perform authentication between the onboard device and the user based on communication with the first terminal device; and a second terminal device includes a second-terminal control unit configured to set a destination of sound data to one of the first terminal device and the onboard device when the onboard-device control unit detects that a predetermined condition including a condition that the user has been authenticated is satisfied.