Dynamic Hearing Aid Amplification for Conversation Clarity
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Solution Overview
Problem
Hearing aid users often speak more quietly due to sound amplification, making it difficult for others to understand them, or they speak at a volume uncomfortable for others due to strong amplification, leading to unpleasant conversations.
Innovation Solution
A hearing aid system that separates ambient sound into components, processes them with different amplification factors based on the user's speech and environmental noise, adjusting the user's speech volume to improve intelligibility and comfort through the Lombard effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hearing aid amplifies ambient sound to compensate for hearing loss, then the user can hear better, but the user's own speech becomes too loud and uncomfortable for them
Solution Approach 1:
The patent segments the amplified sound into two distinct components: ambient sound from the environment and the user's own speech. By separating these components, the system can apply different processing - amplifying ambient sound for hearing compensation while simultaneously attenuating the user's self-speech to prevent discomfort. This resolves the contradiction by allowing both hearing improvement and self-speech comfort coexist.
Solution Approach 2:
The patent dynamically changes the amplification parameter based on the sound source. When detecting the user's own speech, the system adjusts the amplification factor downward; when detecting ambient sound, it maintains or increases amplification. This parameter adaptation allows the hearing aid to provide reliable hearing compensation for ambient sounds while preventing the harmful effect of excessive self-speech amplification.
2Object-affected harmful factors
If the hearing aid reduces amplification of self-speech to improve comfort, then the user experiences less discomfort, but other conversation partners have difficulty understanding the user
Solution Approach 1:
The patent introduces an intermediary processing stage that selectively modifies different sound components. The system acts as a mediator between the user's speech and the amplified output by detecting self-speech and applying specific attenuation only to that component, while leaving other speech components (from conversation partners) unaffected. This resolves the contradiction by preserving speech intelligibility for others while reducing self-speech discomfort for the user.
3Device complexity
If the hearing aid amplifies all sound equally, then the system remains simple, but the user experiences discomfort from their own amplified speech
Solution Approach 1:
The patent transforms the static amplification system into a dynamic one that automatically adapts to different sound sources. The system continuously analyzes incoming sound to identify whether it is ambient sound or the user's own speech, and dynamically adjusts the amplification factor accordingly. This dynamic approach resolves the contradiction by adding minimal complexity (sound source detection and conditional processing) to eliminate the harmful effect of self-speech discomfort.
Data Source
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AI summary
The invention relates to a method (18) for operating a hearing aid system (2), in which an input signal (24) is generated based on ambient sound (22). The input signal (24) is divided into a first signal component (36) and a second signal component (38), wherein the first signal component (36) corresponds to speech (26) of a user and the second signal component (38) does not correspond to speech (26) of the user. A first processed signal (52) is generated based on the first signal component (36) and a first amplification factor (46), and a second processed signal (66) is generated based on the second signal component (38) and a second amplification factor (62). The two processed signals (52, 66) are combined to form an output signal (70). The first amplification factor (46) is selected as a function of a ratio of the first signal component (36) to the second signal component (38).Furthermore, the invention relates to a hearing aid system (2) and a method (74) for commissioning a hearing aid system (2).