Using a magnet near audio cable

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Discussion Overview

The discussion centers around the feasibility of using a magnet near an audio cable, specifically considering the potential for interference with audio quality. Participants explore the idea of replacing a traditional 3.5mm audio jack with a magnetically attaching connector and the implications of such a design.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant proposes using a magnet to replace the 3.5mm audio jack in headphone cables, questioning if this could be done without interference.
  • Another participant asks what leads to the belief that a magnet would interfere with audio signals.
  • A participant expresses concern that sound waves might be interrupted by the presence of a magnet, potentially diminishing audio quality.
  • Further elaboration suggests that the issue may not be the magnet's proximity to the cable itself, but rather its effect on the speaker magnets and voice coils in the headphones.
  • It is suggested that a horseshoe-shaped magnet could be designed to minimize interference by closing the magnetic path and preventing field leakage into the voice coil assembly.
  • Questions are raised about how electrical connections would be made if the cable is held in place solely by a magnet.
  • A comparison is made to Apple's magnetic connector design, which is noted for its effectiveness in disconnecting safely under stress.

Areas of Agreement / Disagreement

Participants express differing views on the potential for interference caused by magnets near audio cables, with no consensus reached on the feasibility or design implications of the proposed magnetic connector.

Contextual Notes

Participants acknowledge the need for testing to better understand the effects of magnets on audio quality and the operational aspects of the proposed design.

Who May Find This Useful

This discussion may be of interest to individuals exploring innovative audio connector designs, audio engineering, and those curious about the interaction between magnetic fields and sound transmission.

mbrand
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I was wondering if there was a way of having a magnet near an audio cable without having any interferance maybe by using a sheild.

My idea was to have a magnet to replace the 3.5mm audio jack in a headphone cable and port so that it would magnetically attach.

Is this possible?
 
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What makes you think a magnet will interfere?
 
I need to do some testing but I think due to the sound waves, the magnet will interrupt them when placed nearby which messes up the audio or diminishes the audio quality
 
mbrand said:
I was wondering if there was a way of having a magnet near an audio cable without having any interferance maybe by using a sheild.

My idea was to have a magnet to replace the 3.5mm audio jack in a headphone cable and port so that it would magnetically attach.

Is this possible?

mbrand said:
I need to do some testing but I think due to the sound waves, the magnet will interrupt them when placed nearby which messes up the audio or diminishes the audio quality

It's not the proximity of the magnet to the cable that could be an issue, it's the proximity of the connector magnet to the speaker magnets and voice coils in the headphones.

If you put another permanent magnet near the permanent magnet and voice coil in the speakers in the headphones, the extra magnetic field could have several bad effects on the operation of the voice coil.

But, if you are using this connector magnet to hold the cable to the headphones, you would make the magnet in a horseshoe shape (or similar), so that when it attaches to the ferrous metal piece on the headphones, its magnetic path is closed, so that none of its magnetic field leaks out to get into the voice coil assembly.

BTW, if you hold the cable on the headphones with just a magnet, how are you planning on making the electrical connections?
 
berkeman said:
BTW, if you hold the cable on the headphones with just a magnet, how are you planning on making the electrical connections?

Apple manage it very well with their recent power book / mac book (?) mains connector. A very smart design which just pulls off harmlessly when stressed too much. It would be particularly useful for a smart phone / ipod for which a normal jack is very unsuitable and vulnerable (for a clumsy sod like me, anyway).
 

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