Earphone Damping Unit for Solids-Borne Sound Decoupling
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Solution Overview
Problem
Wired earphones and headsets suffer from solids-borne sound transmission through connecting cables, which can interfere with electroacoustic reproduction due to contact with clothing or objects.
Innovation Solution
A damping unit with separate first and second openings for the connecting cable, optionally with a spiral configuration and made of a different material than the cable, is used to absorb and prevent further transmission of solids-borne sound, featuring a slot or cut for easy installation and removal, and a Shore hardness between 55 and 95 for effective sound damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a damping unit is integrated into the connecting cable, then solids-borne sound decoupling is improved, but device complexity increases
Solution Approach 1:
The damping unit is designed as a separate, modular component that can be independently manufactured and then attached to the connecting cable. This segmentation allows the damping function to be added without redesigning the entire cable assembly, thus improving sound decoupling while minimizing the increase in overall device complexity.
Solution Approach 2:
The damping unit acts as an intermediary element inserted between sections of the connecting cable. This mediator component specifically targets and dampens solids-borne sound transmission along the cable without interfering with the cable's primary electrical signal transmission function, effectively reducing harmful sound transmission while maintaining cable simplicity.
2Adaptability or versatility
If the damping unit is made as a separate component, then ease of retrofitting existing devices is improved, but manufacturing precision requirements increase
Solution Approach 1:
By dividing the damping unit into a separate component with distinct first and second openings, the design enables retrofitting to existing cables without requiring modification of the original cable structure. The separate component can be manufactured with precise opening positions and then attached as a complete unit, balancing retrofitting ease with manufacturing precision requirements.
Solution Approach 2:
The first and second openings are pre-positioned and pre-aligned during the manufacturing of the separate damping unit component. This preliminary action ensures that when the component is attached to the cable, the openings are already correctly positioned to receive the cable sections, reducing the precision demands on the final assembly process while maintaining adaptability for retrofitting.
3Object-affected harmful factors
If the connecting cable portion between openings is longer than the distance between openings, then solids-borne sound damping effectiveness is improved, but cable length increases
Solution Approach 1:
The damping unit serves as an intermediary element that creates a localized damping zone within the connecting cable. By inserting this separate component with specific opening spacing, solids-borne sound is damped in the cable portion between the openings without requiring the entire cable to be longer, thus improving damping effectiveness while minimizing the overall cable length increase.
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 damping unit effectively decouples solids-borne sound from the connecting cable, preventing interference with the earphone or headset's audio reproduction, allowing for improved sound quality and ease of retrofitting existing devices.
Implementation Method 1
a damping unit for damping solids-borne sound transmitted by the connecting cable
Implementation Method 2
The material of the damping unit is of a hardness of between 55 and 95 Shore
Data Source
AI summary
Thus there is provided an earphone or headset comprising at least one electroacoustic reproduction transducer for the reproduction of audio signals, an electric connecting cable, and a damping unit for damping solids-borne sound transmitted by the connecting cable. The damping unit is in the form of a separate component.