Asymmetrical Hearing Aid Ear Tip Selective Frequency Attenuation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional ear tip pieces fail to provide effective sound attenuation for frequencies between 1000Hz and 4000Hz, leading to increased risk of hearing loss and altering sound quality due to uniform attenuation across all frequencies, which can result in the 'insertion effect' and reduced clarity in communication.
Innovation Solution
The ear tip piece features a reversibly compressible design with a solid end that approximates the ear canal shape, a bend for secure alignment, and channels for sound transmission, optionally including a sound attenuator and coupler to selectively attenuate damaging frequencies while maintaining sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If uniform sound attenuation is applied across all frequencies, then hearing protection is provided, but sound quality and natural resonance are altered
Solution Approach 1:
The ear tip piece applies different attenuation levels to different frequency ranges. Specifically, it provides greater attenuation (15-25 dB) for high frequencies (2000-6300 Hz) that cause hearing damage, while providing minimal attenuation (0-5 dB) for low frequencies (125-500 Hz) that are important for natural sound quality and communication clarity.
Solution Approach 2:
The patent changes the attenuation parameter across different frequency bands rather than applying a uniform attenuation value. The sound attenuator is designed to selectively reduce sound pressure levels at damaging frequencies while preserving the natural resonance characteristics of the ear canal at lower frequencies.
2Manufacturing precision
If the ear tip piece is made rigid for structural stability, then alignment accuracy is improved, but adaptability to different ear canal shapes is reduced
Solution Approach 1:
The ear tip piece is divided into two distinct segments: a rigid first end (proximal end) that maintains structural stability and precise channel alignment, and a flexible second end (distal end) that adapts to the ear canal shape. This segmentation allows each portion to fulfill its specific function without compromising the other.
Solution Approach 2:
The ear tip piece transitions from a static rigid structure to a dynamic hybrid structure where the second end can deform and adapt to different ear canal geometries while the first end remains rigid for precise alignment. This dynamic adaptability allows the device to accommodate variations in ear canal shape among different users.
3Adaptability or versatility
If the ear tip piece is made fully flexible for comfort, then adaptability to ear canal shape is improved, but structural stability and alignment accuracy are reduced
Solution Approach 1:
The ear tip piece is divided into two distinct segments: a rigid first end (proximal end) that maintains structural stability and precise channel alignment, and a flexible second end (distal end) that adapts to the ear canal shape. This segmentation allows each portion to fulfill its specific function without compromising the other.
Solution Approach 2:
The ear tip piece transitions from a static rigid structure to a dynamic hybrid structure where the second end can deform and adapt to different ear canal geometries while the first end remains rigid for precise alignment. This dynamic adaptability allows the device to accommodate variations in ear canal shape among different users.
4Object-affected harmful factors
If sound attenuation is increased for frequencies above 5000Hz, then hearing protection is improved, but natural resonance and communication clarity are reduced
Solution Approach 1:
The ear tip piece applies different attenuation levels to different frequency ranges. Specifically, it provides greater attenuation (15-25 dB) for high frequencies (2000-6300 Hz) that cause hearing damage, while providing minimal attenuation (0-5 dB) for low frequencies (125-500 Hz) that are important for natural sound quality and communication clarity.
Solution Approach 2:
The patent changes the attenuation parameter across different frequency bands rather than applying a uniform attenuation value. The sound attenuator is designed to selectively reduce sound pressure levels at damaging frequencies while preserving the natural resonance characteristics of the ear canal at lower frequencies.
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 design provides improved hearing protection by selectively attenuating the most damaging frequencies, reducing the risk of hearing loss while maintaining sound clarity and quality, as evidenced by experimental data showing reduced noise reduction in frequencies above 5000Hz, thus preserving natural resonance and communication clarity.
Implementation Method 1
The reversibly compressible second end is formed by a hollow having thin walls that facilitate compression and adaptation of the second end to the shape of the ear canal
Implementation Method 2
a sound attenuator inserted into the first channel to attenuate sound being transmitted to an ear
Data Source
Figure 1~3
Figure 4~5
Figure 6~8
AI summary
An ear tip piece device made of resilient material dimensioned for fitting the ear canal of a wearer, having a solid portion, a reversibly compressible portion, a channel and a sound attenuating element positioned inside the channel for attenuating sound being transmitted to the ear. In one embodiment, the ear tip piece is asymmetrical due to a bend.