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Topic: Question in-ears magnetic driver (Read 863 times) previous topic - next topic
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Question in-ears magnetic driver

In-Ears headphones use magnetic dynamic drivers. If you bring the in-ears close to an electronic device that releases magnetism with a 29" CRT TV (coils, speaker) turned on, will this TV cause demagnetization or permanent loss of performance of these in-ear drivers?

Re: Question in-ears magnetic driver

Reply #1 –
It does not sound very likely to me.

It is possible to magnetise and demagnetise "soft" materials, eg iron.  Any permanent magnets in modern consumer products will be "hard" rare-earth metals, if for no other reason than the field strength available in a small volume.

That is not to say the earbuds won't malfunction temporarily, but just what do you mean by "close", and why would you want to??
It's your privilege to disagree, but that doesn't make you right and me wrong.

Re: Question in-ears magnetic driver

Reply #2 –
I've seen this question on two other forums and the answer is still NO!

...If you don't like that answer, try an "audiophile" forum (if you haven't already).   Most audiophools believe a lot of crazy stuff.  This forum an Audio Science Review are rare exceptions where you can find rationality and science.

Re: Question in-ears magnetic driver

Reply #3 –
No.  But if you want to mess up the colors on any CRT, a decent magnet will do the trick.

Re: Question in-ears magnetic driver

Reply #5 –
Are the dual magnetic dynamic drivers of these in-ears very resistant to demagnetization and magnetic losses unlike 2.5" HDDs? To demagnetize or have magnetic losses of these dual magnetic drivers of these in-ear headphones, what power would be necessary? And what power does a 29" CRT have because it has coils and speakers?

Re: Question in-ears magnetic driver

Reply #6 –
All speaker drivers, whether in IEMs, headphones or loudspeakers use magnets. Except relatively rare electrostatic devices.
The magnets are permanent magnets. They can be weakened by very strong, nearby magnetic forces, but you'd have to be doing something very weird to achieve this.... Maybe I'm not getting the true nature of the OP's question?

Re: Question in-ears magnetic driver

Reply #7 –
Maybe that is the point? Yes they can be weakened by very strong nearby forces, so the question is, do CRTs produce such?
They don't, it seems. A loudspeaker magnet is used to get a whole mechanical voice coil moving, while a cathode-ray tube only diverts electrons in vacuum. An AI-generated answer estimates the flux near of a powerful loudspeaker magnet to a tesla or more, and the cathode-ray tube (that should be way inside the cabinet!) to much less than a millitesla. In both cases - literally so: both magnetic sources are inside a case - the headphones will already be at significant distance if you put them atop the box.

As @fooball points out, in-ears often have more magnets of a more powerful material to fit in the tiny space - Nd magnets are still the thing? That is magnetically quite hard, and https://en.wikipedia.org/wiki/Coercivity gives some numbers.

Re: Question in-ears magnetic driver

Reply #8 –
Quote from: classicaran88 on
Are the dual magnetic dynamic drivers of these in-ears very resistant to demagnetization and magnetic losses unlike 2.5" HDDs? To demagnetize or have magnetic losses of these dual magnetic drivers of these in-ear headphones, what power would be necessary? And what power does a 29" CRT have because it has coils and speakers?
What do HDDs have to do with this?  The material in a HDD is DESIGNED to be magnetised and demagnetised, so it is hardly surprising if external magnetic fields are able to erase them.

Why are you asking these pointless questions?  The short answer is you don't need to worry.
It's your privilege to disagree, but that doesn't make you right and me wrong.

Re: Question in-ears magnetic driver

Reply #9 –
understood then the magnetic force exerted by a large 29" CRT TV does not come close to causing magnetic damage to the dual magnetic dynamic drivers used in In-Ears headphones KZ EDX Pro and KZ EDC Pro

it is something very different from the comparison with 2.5" HDDs that demagnetize more easily

Re: Question in-ears magnetic driver

Reply #10 –
What is the main explanation for a dual magnetic dynamic driver of the In-Ear KZ EDC Pro or KZ EDX Pro not being damaged and demagnetic if it is located very close storage to a few centimeters of a 29" CRT TV or 2.5" HDD turned on (both have magnets and coils)?

Re: Question in-ears magnetic driver

Reply #11 –
Magnetic field strength would be far too small.

But why would you want to have them that close anyway?
It's your privilege to disagree, but that doesn't make you right and me wrong.
 

Re: Question in-ears magnetic driver

Reply #12 –
Ask yourself:
How can a loudspeaker have a treble unit close to a bass unit without the bigger one demagnetizing the smaller?

Here they tried to ruin data on hard drives with quite strong magnets: https://www.kjmagnetics.com/blog/erasing-hard-drive-with-magnets . They failed. Not saying it is safe if you want to keep your data, but it is useless if you want to erase data.
This is the magnet: https://www.kjmagnetics.com/dx0x8-neodymium-cylinder-magnet . Takes a 30 kg pull to get it off a steel plate.