Smart Head-Mounted Device Sound Leakage Reduction
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Solution Overview
Problem
Existing smart head-mounted devices suffer from significant sound leakage due to a single speaker design, compromising user privacy.
Innovation Solution
A smart head-mounted device featuring a sound production unit with two speakers, one oriented towards the ear and the other away from the wearer, operating with opposite phases to create an acoustic dipole effect that reduces sound leakage while maintaining clear audio for the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single speaker is used to emit sound towards the wearer's ear, then the audio can be heard clearly by the wearer, but sound leakage occurs and people around can hear the sound
Solution Approach 1:
The single speaker is divided into two separate speakers: a first speaker oriented towards the wearer's ear for clear audio delivery, and a second speaker oriented away from the wearer to generate counter-phase sound waves that cancel leaked sound, thus solving both audio clarity and sound leakage issues
Solution Approach 2:
The second speaker is positioned and oriented to emit sound waves in advance that are opposite in phase to the sound leakage from the first speaker, creating a preliminary counter-action that cancels the harmful sound leakage before it reaches people around the wearer
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 arrangement significantly minimizes sound leakage to external surroundings while ensuring the wearer can hear the audio clearly, enhancing privacy and audio quality.
Implementation Method 1
the two sound production apparatuses have opposite phases and the distance between them is much smaller than the distance from the sound production apparatus to the surrounding people, the two sound production apparatuses form an acoustic dipole effect with respect to the surrounding people, and thus when the sound waves of the two sound production apparatuses are transmitted to the ears of the surrounding people, they can be at least partially canceled by each other
Data Source
AI summary
Disclosed is a smart head-mounted device. The smart head-mounted device comprises a lens and an arm connected to the lens, the same arm being provided with a sound production unit including a first sound production apparatus and a second production apparatus. The first sound production apparatus and a second production apparatus radiate sound waves outward through their respective sound outlets, have opposite phases during operation, and are apart from the same ear hole of a wearer by different distances.