Safe Earphone with Metal Shielded Wire and Nested Microphone
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radiation-proof earphones fail to meet the requirement of reducing electromagnetic radiation to 2 mG or less and often compromise sound quality due to lack of metal shielding and inadequate sound wave channels.
Innovation Solution
A safe earphone design featuring multiple speakers with different frequency responses, a noise reduction signal conversion system that converts active noise reduction signals to passive audio signals, and a metal shielded wire to isolate the human body from radiation, while maintaining high sound quality and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a radiation-proof earphone uses a short sound wave channel (5-10 cm) without metal shielding, then the device complexity is reduced, but the electromagnetic radiation cannot be reduced to 2 mG or less
Solution Approach 1:
The patent introduces a metal shielded wire as an intermediary element between the sound wave channel and the user's ear. This metal shielding acts as a mediator that blocks electromagnetic radiation while allowing sound waves to pass through, thereby reducing radiation exposure to 2 mG or less without requiring complete redesign of the sound transmission path.
Solution Approach 2:
The patent combines different materials with complementary properties: the sound wave channel uses acoustic-transparent materials for sound transmission, while incorporating metal shielding materials to block electromagnetic radiation. This composite approach allows simultaneous achievement of acoustic performance and radiation protection without excessive complexity.
2Object-affected harmful factors
If the microphone is placed outside the air tube in existing radiation-proof earphones, then the radiation shielding is improved, but the microphone function is affected and sound volume is low
Solution Approach 1:
The patent nests the microphone inside the air tube structure, placing it within the existing radiation-shielded environment. The microphone is positioned at a specific location within the tube where it can effectively capture sound while remaining protected by the metal shielding, thus maintaining both radiation protection and microphone functionality.
Solution Approach 2:
The patent repositions the microphone from an external location to an internal position within the air tube, changing its spatial dimension relative to the radiation field. This dimensional repositioning allows the microphone to benefit from the inherent radiation shielding of the tube structure while maintaining optimal acoustic coupling for voice capture.
3Device complexity
If existing radiation-proof earphones lack a sound cavity, then the device complexity is reduced, but the frequency response is not good
Solution Approach 1:
The patent segments the earphone structure into distinct functional zones: a sound cavity section for acoustic resonance and frequency response optimization, a metal shielding section for radiation protection, and a sound wave channel for signal transmission. This segmentation allows each section to be optimized for its specific function without compromising overall simplicity.
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 provides effective radiation protection and superior sound quality by allowing the microphone to remain close to the sound outlet, ensuring a high degree of radiation shielding and noise reduction.
Implementation Method 1
setting a metal shielded wire while a microphone is still kept at a close distance, which achieves a good noise reduction effect and a high degree of radiation protection
Data Source
AI summary
A safe earphone includes a wired safe earphone and an over ear safe headphone, having plurality of speakers with different frequency responses respectively used for two ears to listen, so the frequency response is particularly good; it is provided with a noise reduction signal conversion system which effectively converts the transmission of the active noise reduction frequency signal into the transmission of the passive audio signal and then restore to the transmission of the active audio signal after transmission of 1000 mm in length, therefore human body is isolated from radiation of communication at a long distance, which achieves a good a high degree of radiation protection, and solving the technical problem that the microphone of the existing radiation-proof earphone must be placed outside the air tube. Therefore, the invention is an excellent safe earphone achieving highly radiation-proof, having high sound quality and noise reduction function.