Acoustic Output Device With Dual-Point Sound Sources
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Solution Overview
Problem
Conventional acoustic output devices suffer from sound leakage and poor sound receiving performance due to their open structure, which affects the listening experience and ambient noise reception.
Innovation Solution
The use of dual-point sound sources with phase-difference settings in acoustic output devices, where sound is output through two guiding holes with opposite phases, reduces far-field leakage and enhances near-field sound volume by adjusting sound frequencies and distances between sound sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an open structure is used for acoustic output device, then user comfort and ambient awareness are improved, but sound leakage increases
Solution Approach 1:
The acoustic output device divides the sound output into multiple independent sound holes instead of using a single large opening. This segmentation allows sound to be distributed through multiple paths, maintaining the open structure for comfort while reducing overall sound leakage through destructive interference patterns
Solution Approach 2:
Different regions of the device have different acoustic properties - the sound holes are strategically positioned and sized to create specific acoustic zones. The local acoustic characteristics are optimized to direct sound toward the user's ear while minimizing radiation in other directions, thus reducing sound leakage
2Device complexity
If a single microphone is used for sound receiving, then device complexity is reduced, but sound receiving performance deteriorates due to external noise
Solution Approach 1:
The sound receiving function is segmented into multiple microphones instead of using a single microphone. This allows the system to capture sound from different positions and angles, enabling noise cancellation algorithms to distinguish between desired speech and external background noise, thereby improving sound receiving performance
Solution Approach 2:
The multiple microphones provide feedback signals that are processed to identify and cancel external noise. The system uses the phase and amplitude information from multiple microphone inputs to create adaptive noise cancellation, improving the clarity of received sound while maintaining a relatively simple device structure
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
This configuration effectively increases near-field sound volume while reducing far-field sound leakage, improving the listening experience and ambient noise reception.
Implementation Method 1
dual-point sound sources with phase-difference settings... sound is output through two guiding holes with opposite phases... reduces far-field leakage
Data Source
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AI summary
The present disclosure relates to a pair of glasses. The pair of glasses may include a frame, one or more lenses, and one or more temples. The pair of glasses may further include at least one low-frequency acoustic driver, at least one high-frequency acoustic driver, and a controller. The at least one low-frequency acoustic driver may be configured to output sounds from at least two first guiding holes. The at least one high-frequency acoustic driver may be configured to output sounds from at least two second guiding holes. The controller may be configured to direct the low-frequency acoustic driver to output the sounds in a first frequency range and direct the high-frequency acoustic driver to output the sounds in a second frequency range. The second frequency range may include one or more frequencies higher than one or more frequencies in the first frequency range.