Wireless Earplug Magnetic Induction Receiver Design
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Solution Overview
Problem
Traditional communications earplugs rely on wires for signal transmission, which are cumbersome, prone to snagging, and can cause acoustic leaks, and may experience battery failure, leading to unreliable communication.
Innovation Solution
A wireless communications earplug using a loop transmitter and receiver with a magnetic induction system, where a loop transmitter generates a magnetic field that is converted to a voltage by a coil receiver, eliminating the need for batteries and wires, and incorporating a magnetic speaker case to enhance sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wires are used for signal transmission in communications earplugs, then signal transmission is achieved, but the wires are cumbersome, prone to snagging, and can cause acoustic leaks
Solution Approach 1:
The patent replaces the mechanical wire-based signal transmission system with a magnetic induction system. A loop transmitter generates a magnetic field that couples inductively with a coil receiver in the earplug, converting magnetic energy to electrical signals without physical wire connection. This eliminates the mechanical constraints of wires while maintaining reliable signal transmission.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the transmitter and the earplug receiver. The loop transmitter generates a magnetic field that serves as the medium for signal transmission, replacing the direct electrical connection through wires with an indirect magnetic coupling mechanism.
2Ease of operation
If batteries are used in wireless earplugs, then wireless operation is achieved, but battery failure can occur leading to unreliable communication
Solution Approach 1:
The patent replaces the battery-powered electronic system with a passive magnetic induction system. Instead of using active battery components that can fail, the system uses passive electromagnetic coupling where the loop transmitter provides power and signal through magnetic field induction, eliminating battery failure risks.
Solution Approach 2:
The earplug system serves itself by passively receiving energy and signals through magnetic induction from the external loop transmitter. The coil receiver in the earplug automatically converts magnetic field energy to electrical signals without requiring active battery power management or user intervention for power supply.
3Measurement precision
If a coil receiver is placed close to the speaker, then sensitivity is improved, but magnetic interference may increase
Solution Approach 1:
The patent introduces a magnetic bobbin as an intermediary component between the coil receiver and the speaker. The bobbin provides a controlled magnetic path that directs magnetic flux through the coil receiver to enhance sensitivity, while simultaneously shielding the coil from unwanted magnetic interference generated by the speaker's magnetic field.
Solution Approach 2:
The patent segments the magnetic circuit into distinct functional zones using the magnetic bobbin. The bobbin creates a dedicated magnetic flux path for the receiver coil, separating it from the speaker's magnetic field sources. This segmentation allows the coil to be positioned close to the speaker for sensitivity while maintaining magnetic field isolation to prevent interference.
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 reliable, wire-free communication with improved sensitivity and reduced power requirements, minimizing radio frequency interference and ensuring continuous operation without battery failure, while offering a comfortable and efficient noise attenuation solution.
Implementation Method 1
A wireless earplug has a receiver made of a coil of wire on a magnetic bobbin, mounted in close proximity or in contact with a magnetic case of a speaker. The magnetic case of the speaker serves to increase the magnetic flux through the receiver and improves the efficiency of the earplug.
Implementation Method 2
The magnetic case of the speaker serves to increase the magnetic flux through the receiver and improves the efficiency of the earplug.
Data Source
AI summary
An improved wireless communications earplug for use with a magnetic field transmitter. The wireless earplug has a receiver made of a coil of wire on a magnetic bobbin, mounted in close proximity or in contact with a magnetic case of a speaker. The magnetic case of the speaker serves to increase the magnetic flux through the receiver and improves the efficiency of the earplug. The speaker is acoustically coupled to an eartip, and the earplug may be molded into a custom earplug body.