Acoustic Device Dynamic Sound Filtering
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Solution Overview
Problem
Current acoustic technologies fail to effectively filter and control external sounds heard by users, allowing unwanted noises to be heard while unable to selectively enhance desired sounds in real-time.
Innovation Solution
An acoustic device with a detection section, signal processing section, and sound emitting section that acquires sound signals, applies filter processing based on user-defined conditions, and radiates filtered sounds to the ear canal, allowing selective hearing of desired sounds while masking unwanted ones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If filter processing is applied to sound signals, then unwanted noises are reduced, but the ability to hear all external sounds is compromised
Solution Approach 1:
The patent implements dynamic filter processing where the filter characteristics are not fixed but are adjusted in real-time based on detected sound conditions and user preferences. The system continuously adapts the filtering parameters to maintain optimal noise reduction while preserving important sound information, resolving the contradiction between noise reduction and information preservation.
Solution Approach 2:
The system changes filter parameters dynamically based on the type of sound detected and user-selected preferences. Different frequency ranges, filter strengths, and processing modes are applied depending on whether the user wants to hear speech, music, or ambient sounds, allowing the system to optimize noise reduction for specific conditions without permanently losing sound information.
2Manufacturing precision
If filter processing is changed in real-time, then sound quality is improved, but device complexity increases
Solution Approach 1:
The system performs preliminary classification of sound types and pre-determines appropriate filter settings based on detected sound characteristics. By preparing filter configurations in advance based on sound category recognition, the system achieves high sound quality through complex processing without requiring real-time computational complexity, as the heavy processing is done based on pre-established sound profiles.
3Ease of operation
If selective sound filtering is implemented, then user preference is satisfied, but loss of other sound information occurs
Solution Approach 1:
The patent applies different filtering qualities to different frequency ranges and sound types rather than uniform filtering. Users can select specific preferences for different sound categories (e.g., enhance speech frequencies while reducing bass frequencies), and the system applies localized filter characteristics to specific frequency bands, satisfying user preferences for certain sounds while preserving other sound information through differential processing.
Data Source
AI summary
An acoustic device includes a member which divides an ear canal of a user and an external space when being attached to an ear or the ear canal of the user, a memory that stores instructions, and a processor that executes the instructions. The instructions cause the processor to perform, acquiring a sound signal indicating a sound, applying a filter processing to the acquired sound signal, the filter processing being changed in accordance with a predetermined condition, and radiating the sound indicated by the sound signal applied with the filter processing to the ear canal.