Asymmetric Hearing Aid Signal Processing for Directionality
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Solution Overview
Problem
Individuals with asymmetric hearing loss face challenges in determining the directionality of sounds due to existing hearing aids, which often provide monaural hearing and lack stereophonic sound, leading to difficulties in localizing sound sources and causing distractions.
Innovation Solution
A hearing aid system comprising two members, one with a signal processor that alters sound signals to differentiate them based on pitch, echo, delay, filtering, frequency bands, or artifacts, allowing users to distinguish between sounds originating from the better and poorer ears, thereby simulating stereophonic hearing and improving directionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hearing aid is placed in each ear to treat asymmetric hearing loss, then hearing amplification is provided, but the user cannot determine sound directionality and experiences distraction from garbled sound information in the bad ear
Solution Approach 1:
The patent introduces an intermediary signal processing system that receives audio from the bad ear, processes it through algorithms, and transmits it to the good ear. This intermediary processing enables the user to hear sounds from both ears while maintaining the ability to determine directionality, as the processed signal is delivered through the good ear's natural hearing pathway.
Solution Approach 2:
The patent replaces the mechanical approach of placing hearing aids in both ears with an electronic signal processing system. Instead of relying on the bad ear's mechanical hearing capability, the system uses electronic algorithms to process audio signals and deliver them through the good ear, substituting mechanical hearing limitation with electronic processing enhancement.
2Reliability
If the hearing aid in the bad ear amplifies sound to greater degree, then hearing ability in bad ear improves, but the user experiences distraction and cannot determine sound source direction
Solution Approach 1:
The signal processing system acts as an intermediary that improves hearing in the bad ear without causing distraction. The system processes audio from the bad ear and delivers it through the good ear, allowing the user to benefit from improved hearing in the bad ear while maintaining comfort and attention, as the sound is delivered through the naturally hearing ear rather than causing distortion in the bad ear.
Solution Approach 2:
The patent applies parameter changes by processing audio signals through various algorithms that modify pitch, echo, delay, filtering, frequency bands, or artifacts. These parameter transformations enable the system to enhance hearing ability in the bad ear while creating distinguishable sound characteristics that maintain user comfort and attention.
3Ease of operation
If a single hearing aid is used in the good ear only, then user comfort is improved and distraction is reduced, but the user loses sense of directionality and cannot hear sounds from the bad ear side
Solution Approach 1:
The patent implements multi-functionality by enabling a single hearing aid system to perform multiple functions: it can hear sounds from both the good ear and bad ear sides, process these sounds through algorithms, and deliver them to the user. This universal system provides both comfort (by avoiding garbled sound in the bad ear) and bilateral hearing capability (by processing and delivering audio from both sides).
Solution Approach 2:
The signal processing system serves as an intermediary that enables the single hearing aid to access audio from both ears. The system receives audio from the bad ear side, processes it, and delivers it through the good ear, allowing the single hearing aid to provide bilateral hearing capability while maintaining user comfort.
4Adaptability or versatility
If hearing aids are placed in both ears, then bilateral hearing is provided, but the user must frequently turn head to hear sounds from the bad ear side and cannot determine sound direction
Solution Approach 1:
The signal processing system acts as an intermediary that eliminates the need for frequent head turning. By processing audio from the bad ear and delivering it through the good ear, the system provides bilateral hearing capability without requiring the user to physically reposition their head, as the audio processing compensates for the hearing loss electronically.
Solution Approach 2:
The patent substitutes the mechanical solution of head turning with an electronic processing system. Instead of requiring the user to turn their head to hear sounds from the bad ear side, the system uses electronic algorithms to process and deliver audio signals, replacing the mechanical head movement with electronic signal transformation and delivery.
Data Source
AI summary
The hearing aid apparatus includes a first hearing aid member and a second hearing aid member. The first hearing aid member is placeable on a patient's body, and includes a first transducer for receiving sounds that would be received by the patient's first ear and converting these received sounds into first transmittable signals. The second hearing aid is placeable on a patient's body adjacent to the patient's second ear, and includes a receiver for receiving the first transmittable electrical signals and a second transducer for converting the first transmittable electrical signals into sound signals configured for delivery to the patient's second ear.