Electronic Stethoscope Active Headset Closed Back Volume
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Solution Overview
Problem
Existing electronic stethoscopes suffer from audio signal degradation due to mechanical filtering in hollow tubing and external noise interference, which degrades the quality of sound perceived by the user.
Innovation Solution
An electronic stethoscope with an active headset featuring speakers positioned in the earpieces and a closed back volume, sealed from the hollow tubing, to optimize frequency response and isolate audio signals from external noise, using a mechanical acoustic modifier like acoustic dampening foam to control resonance and overshoot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If audio signals are transmitted through hollow tubing in conventional acoustic stethoscopes, then the structure is simple and passive, but the frequency profile is modified and audio quality is degraded due to mechanical filtering
Solution Approach 1:
The patent replaces the mechanical acoustic transmission system (hollow tubing) with an electronic signal transmission system. Speakers in the headset convert electrical audio signals directly to sound waves, eliminating the mechanical filtering effects of hollow tubing while preserving audio fidelity.
Solution Approach 2:
The patent introduces speakers as an intermediary device between the audio source and the user's ears. The speakers convert electrical signals to acoustic waves directly in the ear canal, serving as a mediator that bypasses the problematic hollow tubing transmission path.
2Reliability
If speakers are positioned in earpieces with open back volume, then the structure is simple, but external noise enters and audio signal degradation occurs
Solution Approach 1:
The patent employs sealed back volumes enclosed by flexible membranes or thin film structures that isolate the acoustic environment behind the speakers from external noise sources, while still allowing for compact headset design.
Solution Approach 2:
The sealed back volume creates an acoustically inert environment behind the speakers, isolating the audio signal generation process from external acoustic interference and maintaining signal purity.
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 solution enhances audio quality by minimizing signal modification and external noise interference, allowing for clear projection of low-frequency sounds typically associated with conventional acoustic stethoscopes, thus improving the fidelity and clarity of physiological sounds without additional training for clinicians.
Implementation Method 1
a headset including a speaker to project audio data generated by a chestpiece
Implementation Method 2
the back volume, and optional addition of a mechanical acoustic modifier positioned in the back volume, allows for optimization of the frequency response and resonance frequency of the speakers
Implementation Method 3
sealing off the back volume from the hollow tubing may mechanically isolate the hollow tubing from the speaker and the audio signal, thereby minimizing external noises that would cause degradation of the audio quality
Implementation Method 4
a mechanical acoustic modifier positioned in the back volume, allows for optimization of the frequency response and resonance frequency of the speakers
Data Source
AI summary
The present description relates generally to methods and systems for an electronic stethoscope device with an active headset, including a speaker to project audio data generated by a chestpiece, the headset defining a closed back volume for the speaker. In this way, the headset provides a back volume of the speakers in order to tune the frequency response of the speakers to a target frequency mimicking the frequency produced by a conventional acoustic stethoscope.