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How do MRI Headphones work? (2022)

tomlingham.com

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Re: How do MRI Headphones work? (2022)

#151

Post by lmz »

m463 wrote: post #107
DavidVoid wrote: post #55

High-end headphone brand Audeze recently made an electrostatic headphone that works in MRI machines.[1] No air tubes needed and much better sound quality (and much more expensive). [1]: https://www.audeze.com/blogs/audeze-journal/press-release-fo...

> [Audeze has since made an audiophile version, called the CRBN headphone, read that story here.] Very vague explanation of how they work, and that link in the middle - I suspect that is the entire point of the press release.

Well it says the headphones are sold by the MRI company:

> The CRBN headphones are integrated into the Lumica AV system from SMRTImage that provides images and movies

Maybe you can get more info out of them: https://www.smrtimage.com/

Re: How do MRI Headphones work? (2022)

#152

Post by agumonkey »

snakeyjake wrote: post #21

>The only headphone tech that I was aware of or that I'd ever really considered I guess I'm old now because this style of headphone was present on every model of passenger aircraft in the sky when I was a young adult.

Hmm I can't recall my earliest flights (late 80s) but rapidly we had normal audio jacks

Re: How do MRI Headphones work? (2022)

#153

Post by saalweachter »

throwaway2037 wrote: post #117
snakeyjake wrote: post #21

>The only headphone tech that I was aware of or that I'd ever really considered I guess I'm old now because this style of headphone was present on every model of passenger aircraft in the sky when I was a young adult.

Does anyone know why old aeroplanes used the plastic tube style of headphones, instead of copper wired? From the blog post, it makes very good sense why the MRI headphones are necessary in that setting. Edit: From this URL: https://avidproducts.com/2023/12/08/celebrating-70-years-of-... This type of headphones are called pneumatic headphones.

Spitballing:

Cost: one speaker and tubes was probably cheaper than 200.

Weight: old headphones were chunky, see above.

Comfort: not wearing giant chunky headphones you weren't accustomed to might have been preferable

Breakability: pneumatic headphones were harder to break, cheaper to replace

Stealability: passengers would have no reason to steal the headphones, and if they did it was cheap to replace.

All of these go away as proper headphones get increasingly small and cheap.

Re: How do MRI Headphones work? (2022)

#154

Post by secretsatan »

dylan604 wrote: post #13
djhope99 wrote: post #9

I thought these were a nice idea when I had my MRI the other day, little did I know that I would barely be able to hear anything over the noise of the MRI machine. Ear plugs were better, kept out the noise of the MRI machine and let me drift into a trance.

What was your experience with the MRI like? Specifically, did you "feel" it? I've had my knee scanned for ACL damage, and have spoken to a few other acquaintances that have had scans as well. We've all discussed having some sensation in the exact part of the body being scanned. We all just happened to similar sports based knee injuries. It was just the slightest of tingling, but noticeable. Definitely not painful or…

I had a head one done, it was very noisy, but the thing I found most uncomfortable, or rather, disconcerting, is when they injected the tracing fluid.

I thought they would do it all the way through, but then I suddenly heard the pump start halfway through the procedure and a slightly cooler fluid running up inside my arms.

Re: How do MRI Headphones work? (2022)

#155

Post by causi »

JohnFen wrote: post #88
causi wrote: post #34

Earlier quoted context omitted.

You shouldn't. If you successfully manage wear leveling all you've done is make sure you have to replace your whole stock at the same time, as well as depriving yourself of regular reminders of what new-ish clothes should look and feel like, leading you to keep wearing worn-out clothes.

> If you successfully manage wear leveling all you've done is make sure you have to replace your whole stock at the same time I've been doing this for decades, but have never encountered this problem. I think because of a combination of the fact that I didn't buy my entire wardrobe all at once to begin with and that different clothes wear at different rates.

If your clothes are wearing at different rates then by definition you aren't wear-leveling.

Re: How do MRI Headphones work? (2022)

#156

Post by adolph »

tonyarkles wrote: post #41
adolph wrote: post #23

Earlier quoted context omitted.

FILO is not the standard method of maintaining one's stock of clothes? How else does a person mange wear leveling?

Lol, since we're going down this road... my clothing ends up getting stored more as a cache with an LRU policy. Every 6 months or so the items at the bottom of the drawer get assessed for eviction (donation). My favourite items are always on top, less used items are easy to find, and the unused items are easy to identify.

This is a much more efficient approach than Maria Kondo’s suggestion to hold each item up and determine its joy factor.

Do you not procure multiple copies of items that have a high value assessment?

Re: How do MRI Headphones work? (2022)

#157

Post by adolph »

mnw21cam wrote: post #45
causi wrote: post #34

Earlier quoted context omitted.

You shouldn't. If you successfully manage wear leveling all you've done is make sure you have to replace your whole stock at the same time, as well as depriving yourself of regular reminders of what new-ish clothes should look and feel like, leading you to keep wearing worn-out clothes.

With socks, wear levelling is actually really useful. I tend to buy a whole rotation of identical black socks, and then I don't need to pair them up individually. Also, buying 15 pairs of socks in one go isn't going to break the bank.

Wear leveling socks is a critical challenge for me. Unlike larger clothes, socks don’t stack easily, so defy conventional methods of stock rotation.

How do you approach this? Would it make sense to buy one of those shelf springs that grocery stores use to keep boxes towards the from of the shelf?

Re: How do MRI Headphones work? (2022)

#158

Post by adolph »

cyberax wrote: post #113
adolph wrote: post #100

Earlier quoted context omitted.

> A couple of months before that, start buying new models of clothes to find the best one. This is so important. You'd think that manufacturers would just keep the same stuff for sale all the time for all time but it doesn't work that way. Lands End comes close for button shirts and wool trousers, but that formality level is wasteful for work from home. Edit: At first the 15 copies seemed excessive since only 7 are n…

Yeah, I'm absolutely pissed that New Balance had stopped making my favorite model of sneakers. I bought the last 5 pairs of them from a seller on eBay. Like, a model is great and it sells well, why would you stop making it?!? > Edit: At first the 15 copies seemed excessive since only 7 are needed for weekly laundry, but basically you can get 2x longevity out of the stock based on laundry wear. 1 week of clothes does…

Shoes and glasses frames are the worst for not being able to just buy the same thing for all time. Glasses have gotten better since I was a kid but shoes worse. I’ve given up on shoe aesthetics since Mizuno makes upgrades the same model with different colors. Looks like the current version of Wave Rider is 27.

Edit: Regarding total stock of clothes: this is a tricky balance between storage and wash cycle. Ideally I would do laundry nightly for day clothes and daily for pajamas so that no storage was necessary. With ~7 days storage already seems excessive since most days of the week there is more dirty than clean. It also only requires one load of laundry. With ~14 days that is twice the storage and while there are fewer batch operations there doesn’t seem to be a time savings since it would require two loads . . . Wait, do you scale in parallel by using a laundromat?

Re: How do MRI Headphones work? (2022)

#159

Post by leejo »

jonah wrote: post #25
caseyohara wrote: post #18

Earlier quoted context omitted.

I recently got an MRI and the technician asked me what I wanted to listen to on the headphones. I said "Something relaxing, do you have ambient music?". This turned out to be a terrible choice; the music was so quiet I could barely hear it. Earplugs would have been better. I had some in my pocket that I brought but it was too late. So after the claustrophobic panic subsided and I realized I was left in there with not…

When I had an MRI a few years ago, my conclusion about the sound was "add a melody on top of that rhythm, and it would go over quite well in an underground industrial music club in an abandoned warehouse outside of Berlin." I haven't looked to see if anyone has actually tried to make music with the sound or not.

When I had one it felt like I was listening to early to mid 2000s Autechre. In other words, almost interesting, almost enjoyable, just not quite there.

Re: How do MRI Headphones work? (2022)

#160

Post by JohnFen »

causi wrote: post #155
JohnFen wrote: post #88

Earlier quoted context omitted.

> If you successfully manage wear leveling all you've done is make sure you have to replace your whole stock at the same time I've been doing this for decades, but have never encountered this problem. I think because of a combination of the fact that I didn't buy my entire wardrobe all at once to begin with and that different clothes wear at different rates.

If your clothes are wearing at different rates then by definition you aren't wear-leveling.

I guess it depends on what you mean by wear-leveling. I interpreted it as wearing all of your clothes about equally as much.
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