Hearing imbalances that change through a listening session?
Dec 1, 2023 at 6:10 PM Thread Starter Post #1 of 12

klardotsh

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Wanted to poke around here and see just how common this is, or if anyone has tips on either fixing the root causes of it, or at least brain-acclimating to it.

Starting about a year ago, I noticed my stereo image started leaning to the right: just 2% or so at first, to the point that I often didn't bother fixing it with channel volumes. This wasn't the first time in my life I'd had imbalances: 8 or so years ago I recall always having to set a 5% lean to the left for my M50Xes to sound balanced. Eventually that went away and I didn't have to think about channel balance for many years - even on those same M50X (which I've long since upgraded from).

Through the winter of 2022-23 and into the spring, I noticed that originally-2% slowly started becoming 5%, and I saw an audiologist about it. My ears tested as "some of the best [she'd] ever seen", including being hypersensitive to certain frequencies in my left (quieter, so I assumed) ear: she tested some frequency at a volume she swore up and down there was no way I should be hearing, especially with my tinnitus, and yet I nailed that pitch 100% of the time, even when tested randomly.

Over the summer and now into fall and another winter, things stayed mostly around a 5% channel imbalance on average, but I've started noticing a trend for that imbalance to skew worse through a listening session: where I might have a 100L/95R balance when I first sit down and put my headphones on, within an hour or two I might need 100L/93R or even 100/90 to avoid experiencing treble nearly exclusively through my right ear. In bed with IEMs last night, at one point I had to skew as far as 100/88, so now I'm getting a bit concerned: what's wrong with me, and is it even worth bothering with another trip to an audiologist about this? Would they even be able to do anything?

I've used an electric ear wax cleaner-sprayer thing. My ears came out perfectly clean, as they did in the spring when I had them professionally cleaned trying to triage whatever this is - if anything, my ears seem to make extremely little wax, or at least it doesn't seem to build up. As a kid and teen it did, but in adulthood, I've never had wax problems - much like how as a kid I had ear and sinus infections seemingly monthly, but as a teen and in adulthood, I've never really dealt with such issues.

This is most annoying with over-ear headphones: with speakers and in day to day IRL life, there's some sign of imbalance, but it mostly doesn't interfere with life - at worst, I just make sure I sit to the left of friends so I hear them with my right, usually louder/clearer, ear. With IEMs, I can just keep changing L/R balance and the frequency spectrum evenly responds. With over-ears, though, since bone and cartledge and the physical ear all play a part in feeling and hearing sounds, once I drop the R channel low enough, I start finding the sound thin and lacking bass (but I have to drop it, or the treble is nearly solely experienced from my right ear).

Thoughts?
 
Dec 1, 2023 at 7:20 PM Post #2 of 12
Are you certain you're not hearing a channel imbalance in the headphone or iem drivers?

This started happening to me with a headphone. Left side sounded noticeably lower, and I thought the same... that my hearing was going. A few weeks later, that left speaker died.
 
Dec 1, 2023 at 7:24 PM Post #3 of 12
This has unfortunately been happening across countless headphones and IEMs for a year(ish) now, and the worsening lately is noticeable on both my cans and my IEMs. There's no realistic chance that 6 sets of over-ears and 4 sets of IEMs have all been flakey through 5 different source chains I've tested in that year :)

I really, really wished it had been a driver failure when I first started noticing this. Would have been so much easier to triage...
 
Dec 1, 2023 at 9:47 PM Post #4 of 12
This has unfortunately been happening across countless headphones and IEMs for a year(ish) now, and the worsening lately is noticeable on both my cans and my IEMs. There's no realistic chance that 6 sets of over-ears and 4 sets of IEMs have all been flakey through 5 different source chains I've tested in that year :)

I really, really wished it had been a driver failure when I first started noticing this. Would have been so much easier to triage...
Does your head have an unusual shape?
 
Dec 4, 2023 at 9:43 PM Post #5 of 12
Does your head have an unusual shape?
Not that I can think of! My ear canals are of somewhat different sizes which might have something to do with it? But I can't imagine a 10% volume imbalance from just that... especially not something that seems to be come-and-go :\
 
Dec 4, 2023 at 10:31 PM Post #6 of 12
I had a few weeks recently with a similar issue, reversed the headphones and the right side stayed weak, so I knew it wasn't the headphones. Cleaned the ears and did a L/R hearing test on youtube for low to high frequency, showed that the right side was only a tiny bit worse than the left, so not sure a hearing test can fully capture this issue. So, I started doing ear pressurizations by placing 2 knuckles in the nostrils, and gently popping the ear drums, then I open mouth wide to re-stabilize the pressure. I did this numerous times during listening sessions over the course of about a month, and haven't noticed the imbalance recently. I think there might have been a drainage issue on my right side, I do have bad allergies. You might even try decongestant tablets along with a pressurizing routine.
 
Dec 5, 2023 at 1:13 PM Post #7 of 12
If you don't mind I share my story although in my case the loudness is not changing during listening sessions, for me it is all psychological though. The story is there was a small dust particle on the pad of my Fostex TR-X00 and stupid me I gently (I swear to god I was gentle) blew it off, then put it back to continue listening and the right side pretty much lost the bass and in general sounded terrible. I bought replacement drivers (two for a lot of money...), replaced them and since then the right side is a bit less loud. Now the deal is I rotated the pads 180 degrees and flipped sides, still right side I hear less loud. Now you could say I have hearing loss but I have a private pilot license with class I commercial airline pilot medical, my hearing has no issues at all. Tried with other headphones/IEMs and no problems so it must be psychological. It is funny how much your brain can fool you.
 
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Dec 27, 2023 at 8:09 PM Post #8 of 12
I had a few weeks recently with a similar issue, reversed the headphones and the right side stayed weak, so I knew it wasn't the headphones. Cleaned the ears and did a L/R hearing test on youtube for low to high frequency, showed that the right side was only a tiny bit worse than the left, so not sure a hearing test can fully capture this issue. So, I started doing ear pressurizations by placing 2 knuckles in the nostrils, and gently popping the ear drums, then I open mouth wide to re-stabilize the pressure. I did this numerous times during listening sessions over the course of about a month, and haven't noticed the imbalance recently. I think there might have been a drainage issue on my right side, I do have bad allergies. You might even try decongestant tablets along with a pressurizing routine.
You're onto something here. I've spent the past few days treating myself as a medical testbed of DIY sorts and trying all sorts of stretches, pressure normalization (something I already have to do all day every day because the pressure in my ears never feels right; maybe this should have been my first clue...), allergy meds, and decongestant things (all OTC in the US, nothing prescription or even pharmacy).

- Pressure normalization (like plugging nose and breathing kinda thing) changes perception only extremely briefly, I'll call this a rounding error.
- Stretches do basically nothing perceptible.
- PE tablets (the "bad" Sudafed that's mostly clinically proven to be unabsorbable orally, but I tried it anyway) do exactly nothing.
- Allergy meds alone (store brand Claritin-alike) seem to do little, though maybe I sneeze less in general in life :) and eyes might itch a bit less
- Now for the winner: Mucinex minty decongestant spray! Three spurts to each nostril as indicated on the box, wait 10-20 minutes, put headphones on, and voila, dead-center balance on the DAC is listenable (not perfectly correct, but "good enough") again! Whereas I normally have to have it anywhere from 5% to 25% faded to the left.

The problem is, these Mucinex sprays are not supposed to be used continually - I spaced my experiments out a couple days to avoid the "rebound congestion" effect warned about on the label and online. I picked up one of the off-brand OTC fluticasone-based sprays (safer, allegedly, for longer term use) I'll play with while awaiting an appointment with an ENT - at this point I feel pretty confident skipping another trip to audiology (to get told my ears are perfectly fine, presumably), this evidence seems to indicate something sinus/structure related, not ear hair/nerve/etc. directly (phew, lucky if true!)

Thanks for bouncing ideas and the inspiration to investigate congestion. I'll take "not perfect, especially in treble, but close enough" over "20% wrong and annoying AF" any day, but maybe an ENT can get me back to "actually correct" :)
 
Dec 27, 2023 at 8:37 PM Post #10 of 12
"because the pressure in my ears never feels right"


I'm being serious here, could it be ear wax?
Last December (not long after this saga originally started) I went and had them looked at by an ear cleaning specialist up in Bellingham, she ironically said the right side (good sound quality) was worse for wax than the left (dim sound quality) at the time, but that neither side was "noteworthy".

I haven't had them professionally cleaned out since, but maybe I'll ask ENT to do that when I roll in there "soon-ish". Or I'll finally rig up the little ear camera that came with the at-home cleaning sprayer I got on Amazon on a friend's recommendation....
 
Dec 27, 2023 at 8:46 PM Post #11 of 12
Last December (not long after this saga originally started) I went and had them looked at by an ear cleaning specialist up in Bellingham, she ironically said the right side (good sound quality) was worse for wax than the left (dim sound quality) at the time, but that neither side was "noteworthy".

I haven't had them professionally cleaned out since, but maybe I'll ask ENT to do that when I roll in there "soon-ish". Or I'll finally rig up the little ear camera that came with the at-home cleaning sprayer I got on Amazon on a friend's recommendation....
This might be worth a try.

https://www.amazon.com/Debrox-Drops-Earwax-Removal-Aid/dp/B0011WFO1G
 

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