4 ms·

I think this should be marked [2015], as the video included on the site was uploaded in 2015. But still, this is really cool! I also didn't know that the ear

I think this should be marked [2015], as the video included on the site was uploaded in 2015. But still, this is really cool! I also didn't know that the ear has a "self-defense" mechanism against loud noise. I wonder how that mechanism interacts with things like headphone audio being played at high volumes. Does the mechanism eventually wear out? How does that affect people who do sound effects/mixing/mastering for a living?

arkades 7y ago
The mechanism is specifically: a muscle (stapedius) attached to one of the bones of the inner ear (stapes) pulls it away, effectively breaking the sound conduction pathway. This mechanism does not wear out. It can, however, be disrupted by damage to the muscle in question, or to the nerve innervating that muscle, or the portion of brain controlling that nerve. However, you can still conduct sound without the stapes in place. It’s less effective - that’s why the bones of the inner ear are there at all - but in loud settings, and certainly in conditions where you can conduct sound effectively to the bones of the skull (eg, headphones), you can still pass enough sound to the cochlea to damage your hair cells.
outworlder 7y ago
> Does the mechanism eventually wear out? I hope not, because I have been able to control the muscle voluntarily and it is still works after almost four decades. It doesn't go off by itself all the time though. It's more for sudden loud noise, I don't think it works at all for sustained loud noises.
- MrEldritch 7y ago
  >I hope not, because I have been able to control the muscle voluntarily and it is still works after almost four decades. Oh, is that how the brain rumblies thingy works? Huh, I never realized most people couldn't do that.
  - tmacro 7y ago
    I realized it was rare, but I've never been able to explain what I'm doing to other people. Now I finally know!
    - nsxwolf 7y ago
      Whoah! I thought everyone could do this!
  - xamuel 7y ago
    There's a subreddit for this ability: https://old.reddit.com/r/earrumblersassemble/ https://old.reddit.com/r/earrumblersassemble/
- taneq 7y ago
  > It's more for sudden loud noise, I don't think it works at all for sustained loud noises. Yeah, it’s for when your brain thinks there might be a loud noise. I, too, was surprised when I found out that being able to deliberately tense it wasn’t ‘normal’.
  - hunter2_ 7y ago
    It's not normal? Not sure about that.
    - taneq 7y ago
      https://en.wikipedia.org/wiki/Tensor_tympani_muscle#Voluntary_control https://en.wikipedia.org/wiki/Tensor_tympani_muscle#Voluntar... "Some individuals can voluntarily produce this rumbling sound by contracting the tensor tympani muscle of the middle ear." (Emphasis mine.)
      - hunter2_ 7y ago
        "Some individuals can voluntarily produce this rumbling sound by contracting the tensor tympani muscle of the middle ear. The rumbling sound can also be heard when the neck or jaw muscles are highly tensed as when yawning deeply." That is: there are 2 methods. The first method only "some...can" and the second method "[all people] can". The second method seems to be exactly what I voluntarily do; unfortunately the second method's description omits mention of voluntariness ("as when" means that yawning is not mandatory) though. Thus, the "all people" method and doing it voluntarily might overlap much of the time. Aside: I also have a hardly-traumatic "ear popping" (I say it that way because pressure-caused popping is called barotrauma) as a very early precursor to my voluntary rumbling. I wonder how typical that is...
- adrianN 7y ago
  I wonder whether deliberate ear-rumbling trains the muscle sufficiently to improve the protection.

arkades 7y ago

The mechanism is specifically: a muscle (stapedius) attached to one of the bones of the inner ear (stapes) pulls it away, effectively breaking the sound conduction pathway. This mechanism does not wear out. It can, however, be disrupted by damage to the muscle in question, or to the nerve innervating that muscle, or the portion of brain controlling that nerve. However, you can still conduct sound without the stapes in place. It’s less effective - that’s why the bones of the inner ear are there at all - but in loud settings, and certainly in conditions where you can conduct sound effectively to the bones of the skull (eg, headphones), you can still pass enough sound to the cochlea to damage your hair cells.

outworlder 7y ago

> Does the mechanism eventually wear out? I hope not, because I have been able to control the muscle voluntarily and it is still works after almost four decades. It doesn't go off by itself all the time though. It's more for sudden loud noise, I don't think it works at all for sustained loud noises.

MrEldritch 7y ago
>I hope not, because I have been able to control the muscle voluntarily and it is still works after almost four decades. Oh, is that how the brain rumblies thingy works? Huh, I never realized most people couldn't do that.
- tmacro 7y ago
  I realized it was rare, but I've never been able to explain what I'm doing to other people. Now I finally know!
  - nsxwolf 7y ago
    Whoah! I thought everyone could do this!
- xamuel 7y ago
  There's a subreddit for this ability: https://old.reddit.com/r/earrumblersassemble/ https://old.reddit.com/r/earrumblersassemble/
taneq 7y ago
> It's more for sudden loud noise, I don't think it works at all for sustained loud noises. Yeah, it’s for when your brain thinks there might be a loud noise. I, too, was surprised when I found out that being able to deliberately tense it wasn’t ‘normal’.
- hunter2_ 7y ago
  It's not normal? Not sure about that.
  - taneq 7y ago
    https://en.wikipedia.org/wiki/Tensor_tympani_muscle#Voluntary_control https://en.wikipedia.org/wiki/Tensor_tympani_muscle#Voluntar... "Some individuals can voluntarily produce this rumbling sound by contracting the tensor tympani muscle of the middle ear." (Emphasis mine.)
    - hunter2_ 7y ago
      "Some individuals can voluntarily produce this rumbling sound by contracting the tensor tympani muscle of the middle ear. The rumbling sound can also be heard when the neck or jaw muscles are highly tensed as when yawning deeply." That is: there are 2 methods. The first method only "some...can" and the second method "[all people] can". The second method seems to be exactly what I voluntarily do; unfortunately the second method's description omits mention of voluntariness ("as when" means that yawning is not mandatory) though. Thus, the "all people" method and doing it voluntarily might overlap much of the time. Aside: I also have a hardly-traumatic "ear popping" (I say it that way because pressure-caused popping is called barotrauma) as a very early precursor to my voluntary rumbling. I wonder how typical that is...
adrianN 7y ago
I wonder whether deliberate ear-rumbling trains the muscle sufficiently to improve the protection.