Head-Mounted Device Rotary Arm Audio Mode Switching
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Solution Overview
Problem
Existing augmented reality (AR) head-mounted devices struggle to adaptively manage audio output in varying environments, failing to balance clear audio delivery with ambient sound perception and noise reduction.
Innovation Solution
A head-mounted device with a rotary arm mechanism and bone conduction speaker, equipped with a noise collection module, mode determination module, and mode switching module, which dynamically adjusts audio output based on ambient noise to switch between different audio modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If audio is output through traditional speakers in AR devices, then audio clarity is improved, but ambient sound perception is blocked and safety is compromised
Solution Approach 1:
The audio output function is segmented into two independent paths: bone conduction speaker for audio delivery and open-ear earphone for ambient sound perception. This segmentation allows users to clearly hear audio content while simultaneously perceiving environmental sounds, resolving the contradiction between audio clarity and safety.
Solution Approach 2:
The bone conduction speaker acts as an intermediary that transmits audio signals through the skull bone to the inner ear, bypassing the external ear canal. This intermediary mechanism delivers clear audio without blocking the ear canal, allowing ambient sound perception to be maintained.
2Measurement precision
If noise reduction processing is applied to block external noise, then audio quality is improved, but user awareness of environment is reduced
Solution Approach 1:
The audio system is segmented into bone conduction speaker for audio content and open-ear earphone for environmental sounds. This segmentation enables high-fidelity audio delivery while maintaining environmental awareness, as the ear canal remains open to capture ambient noises.
Solution Approach 2:
The open-ear earphone design allows the ear canal to serve its natural function of capturing environmental sounds while the bone conduction speaker handles audio content delivery. The system leverages the ear's natural capabilities rather than blocking them.
3Adaptability or versatility
If a rotary arm mechanism with multiple components is added to enable mode switching, then adaptability to different scenarios is improved, but device complexity increases
Solution Approach 1:
The rotary arm mechanism provides dynamic adjustability, allowing the earphone to rotate between different positions (wearing position, storage position, etc.). This dynamic structure enables the device to adapt to different usage scenarios without requiring multiple separate components for each function.
Solution Approach 2:
The rotary arm mechanism serves multiple functions: it positions the earphone for different ear types, stores the earphone when not in use, and enables mode switching between bone conduction and open-ear modes. This multi-functionality reduces the need for separate components for each purpose.
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
The device effectively adapts to different scenarios by switching audio modes based on ambient noise, enhancing user experience by ensuring clear audio while maintaining awareness of the environment and reducing noise interference.
Implementation Method 1
the bracket is provided thereon with a bone conduction speaker
Data Source
AI summary
A head-mounted device and a control method, apparatus and system are disclosed. The head-mounted device comprises a device body, a bracket connected with the device body, and at least one rotary arm. The bracket is used to wear the head-mounted device on a user's head. The bracket is provided thereon with a bone conduction speaker. One end of the rotary arm is rotationally connected to the bracket, and the other end of the rotary arm is provided with an earphone.