Speaker Housing Acoustic Interference for Suppressing Sound Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Bone conduction speakers experience sound leakage due to housing vibrations, which can compromise privacy and disturb others, and existing solutions like dual magnetic structures increase volume, weight, and cost while providing inadequate sealing.
Innovation Solution
Incorporating sound guiding holes in the housing to guide sound waves inside the speaker to interfere with leaked sound waves, reducing their amplitude without increasing volume or weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a dual magnetic structure and double-frame are used to reduce sound leakage, then sound leakage is reduced to some extent, but volume, weight, and cost increase
Solution Approach 1:
The patent extracts the harmful sound waves generated by housing vibrations and guides them through dedicated sound guiding holes to a specific region. By separating the sound leakage path from the general housing structure and directing it through specific channels, the patent reduces sound leakage without requiring a dual-frame structure, thus avoiding increased volume and weight.
Solution Approach 2:
The patent introduces sound guiding holes as intermediary structures that channel sound waves from the housing to an external region. These holes act as mediators between the sound source (housing vibrations) and the external environment, allowing controlled sound guidance without the need for complex sealing structures that would increase volume and weight.
2Object-generated harmful factors
If a dual magnetic structure and double-frame are used to reduce sound leakage, then sound leakage is reduced to some extent, but device complexity increases
Solution Approach 1:
The patent segments the sound guidance function into specific sound guiding holes distributed on the housing surface, rather than using a complex dual-frame structure. This segmentation allows sound waves to be guided through multiple simple channels, reducing overall structural complexity while maintaining sound leakage control.
Solution Approach 2:
Instead of trying to block sound leakage through complex sealing structures (the conventional approach), the patent inverts the approach by providing dedicated pathways for sound waves to travel in a controlled manner to a specific region. This inversion simplifies the structure by replacing complex blocking mechanisms with simple guiding channels.
3Object-generated harmful factors
If sound guiding holes are added to guide sound waves, then sound leakage is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent merges the sound guiding holes directly into the housing structure during the housing manufacturing process. By integrating the sound guiding function into the housing itself rather than adding separate components, the patent reduces manufacturing complexity. The holes can be formed using standard manufacturing techniques such as drilling or molding, which are easily incorporated into existing housing production workflows.
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
Effectively reduces sound leakage by utilizing sound interference principles, maintaining speaker size and weight, and enhancing privacy and user experience.
Implementation Method 1
the air inside the housing is pushed out of the housing through the at least one sound guiding hole, interferes with the leaked sound wave, and reduces an amplitude of the leaked sound wave
Data Source
AI summary
A speaker comprises a housing, a transducer residing inside the housing, and at least one sound guiding hole located on the housing. The transducer generates vibrations. The vibrations produce a sound wave inside the housing and cause a leaked sound wave spreading outside the housing from a portion of the housing. The at least one sound guiding hole guides the sound wave inside the housing through the at least one sound guiding hole to an outside of the housing. The guided sound wave interferes with the leaked sound wave in a target region. The interference at a specific frequency relates to a distance between the at least one sound guiding hole and the portion of the housing.