Acoustic Waveguide Structure for Wearable Audio Leakage Control
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Solution Overview
Problem
Wearable devices such as smart glasses face issues with voice leakage, leading to privacy concerns, especially in noisy environments where users need to increase sound volumes for audio clarity.
Innovation Solution
An audio control method that includes an acoustic waveguide structure to focus sound and reduce leakage, along with a processor that acquires the operation status of the acoustic waveguide and generates control signals to adjust the sound volume and frequency of the loudspeaker accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sound volume of the wearable device is increased to improve audio clarity in noisy environments, then the user can hear the audio clearly, but the voice leakage increases and privacy is compromised
Solution Approach 1:
The acoustic waveguide structure directs sound waves to specific locations (toward the user's ear) while blocking sound propagation in other directions. This creates localized sound quality improvement for the user without increasing overall sound leakage to the environment, resolving the contradiction between audio clarity and privacy protection.
Solution Approach 2:
The acoustic waveguide acts as an intermediary structure between the loudspeaker and the external environment. It mediates the sound waves by channeling them toward the user's ear while preventing direct radiation into the surrounding environment, thus enabling clear audio for the user without compromising privacy.
2Object-generated harmful factors
If the sound volume of the wearable device is set to low to reduce voice leakage, then privacy is improved, but the audio clarity deteriorates and the user cannot hear clearly in noisy environments
Solution Approach 1:
The acoustic waveguide structure creates a localized sound delivery path that concentrates audio energy toward the user's ear. This allows the system to maintain low overall sound volume for privacy protection while ensuring high audio clarity for the user through focused sound delivery in the specific direction of the ear.
Solution Approach 2:
The acoustic waveguide serves as an intermediary that enables the system to decouple the relationship between overall sound volume and audio clarity. It allows low volume operation for privacy while maintaining clarity through the waveguide's sound-channeling function, resolving the trade-off between these two parameters.
3Object-generated harmful factors
If an acoustic waveguide structure is added to focus sound and reduce leakage, then privacy is improved and audio clarity is enhanced, but the device complexity increases
Solution Approach 1:
The acoustic waveguide can be implemented using thin film or shell structures that provide effective sound waveguiding with minimal bulk. This reduces the complexity penalty by using lightweight, space-efficient materials that achieve the desired acoustic functionality without significantly increasing the overall device size or structural complexity.
Solution Approach 2:
The acoustic waveguide utilizes three-dimensional sound wave propagation paths to achieve sound focusing. By exploiting spatial dimensionality rather than adding complex mechanical components, the system achieves privacy and clarity improvements through geometric sound channeling, which is more elegant and less complex than alternative approaches.
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 solution effectively reduces sound leakage while ensuring the user receives clear audio, enhancing privacy and user experience by focusing sound towards the user.
Implementation Method 1
providing an acoustic waveguide structure configured to implement a sound focusing function
Data Source
AI summary
An audio control method, a wearable device, and an electronic device. The audio control method is used for controlling the wearable device. The audio control method includes: providing an acoustic waveguide structure configured to implement a sound focusing function; acquiring an operation status of the acoustic waveguide structure, and generating a first control signal when the operation status of the acoustic waveguide structure is in an enabled state; and reducing a sound volume of the loudspeaker of the wearable device according to the first control signal.