Was Recovering, Then Saw a Movie... Mistake?

[Bill Bauer]

I was interested in the physics behind it.

I believe it has to do with bone conduction...

I think the links below is what you are looking for:
http://www.tkontheweb.com/static/articles/limitations_of_dual_ear_protection.pdf

https://pdfs.semanticscholar.org/b76c/999a844d52d02bbc1a3a0f9c4ce0a2dfa1d4.pdf

https://www.ncbi.nlm.nih.gov/pubmed/14587596

I am not sure what to make of

 

[GregCA]

I believe it has to do with bone conduction...

I think the links below is what you are looking for:
http://www.tkontheweb.com/static/articles/limitations_of_dual_ear_protection.pdf

Thanks. This link is a bit confusing (in its conclusion):

"So what is a correct formula to use when fitting dual hearing protection? Currently, there is none. Fitting dual hearing protection is unfortunately a flying by the seat of your pants methodology. Elliott Berger states no easy rule of thumb could be devised to predict combined attenuation.

In the end, it is documented that dual protection adds but only 5 to 10 dB of attenuation. "​

It certainly doesn't get into the physics of it at all.

https://pdfs.semanticscholar.org/b76c/999a844d52d02bbc1a3a0f9c4ce0a2dfa1d4.pdf

This one is quite interesting, not because it shows the math behind it, but because it shows measurements, and there's an interesting graph (Figure 14) that shows how the attenuation works (ear plugs, + muffs, + shell), and we can see how unevenly the frequencies are affected. The takeaway from that figure however is that - at least in their setup - the attenuation obtained by adding muffs is pretty good between 500 Hz and 2 kHz, but not that good outside of that.

https://www.ncbi.nlm.nih.gov/pubmed/14587596

Unfortunately just an abstract here.

The second link was the most informative I think. It does explain the variation of impedance with frequency of various parts of the head, and it does make sense that bone conduction finds "a way around" your protection, whether it's with ear plugs, or ear plugs and ear muffs (the next step is the helmet!).

 

[Bill Bauer]

Unfortunately just an abstract here.

Damn, sci-hub.tw doesn't seem to work for this one...

 

[Holly1987]

I believe it has to do with bone conduction...

I think the links below is what you are looking for:
http://www.tkontheweb.com/static/articles/limitations_of_dual_ear_protection.pdf

https://pdfs.semanticscholar.org/b76c/999a844d52d02bbc1a3a0f9c4ce0a2dfa1d4.pdf

https://www.ncbi.nlm.nih.gov/pubmed/14587596

I am not sure what to make of

I got these for Christmas and hate them. They are really awkward to insert and don't feel right in my ears. I have had no problems with other earplugs.

 

[Robert44]

People on this forum refer to the above as "fleeting tinnitus".

I've had "fleeting Tinnitus" before. I had the kind that's the high pitch that you get for a few seconds then goes away. I guess it's still fleeting T but what I was getting in my left ear was a roaring sound like an ocean sound right in your ear. never had this before. I know I've of people who have this permanently. This seems like it would be worse that the high pitch sounding T that i have. I don't know. All I was saying is that I didn't do anything to get it. I guess the roaring sound is still considered to be T.

 

[JurgenG]

His experience (as well as the experiences of countless others who shared their horror stories here) prove that it is NOT FINE (yes, even though he wore ear protection that provides a false sense of security).

You can ignore reality, but you are not going to be able to ignore the consequences of you ignoring reality.

Stop the damn fear mongering man. You are probably listening to your television louder than he was with all the protection on.

 

[kelpiemsp]

3M is a reputable company. I doubt they would rehash information that makes their products look bad for no reason.

Not to point out something tangential.. but 3m is anything but a reputable company. They have been dumping cancer causing chemicals illegally into city water and was recently fined over 850 million. They were lucky, some administrative hiccups prevented them from being fined the full 5 billion...

 

[Bill Bauer]

Stop the damn fear mongering man.

Stop encouraging reckless behaviour.

The way I see it, you are saying the equivalent of "It can't be the case that giraffes have such long necks." You refuse to believe your "lying eyes," because what your eyes are seeing are horror stories that do not match some model that you have in your mind about what Ought to be dangerous for people like us.

 

[Bill Bauer]

Not to point out something tangential.. but 3m is anything but a reputable company. They have been dumping cancer causing chemicals illegally into city water and was recently fined over 850 million.

I didn't know about that.

I just know that all of their products that I had a chance to try were of quality that seemed to be head and shoulders above that provided by the products produced by their competitors.

 

[JurgenG]

Stop encouraging reckless behaviour.

The way I see it, you are saying the equivalent of "It can't be the case that giraffes have such long necks." You refuse to believe your "lying eyes," because what your eyes are seeing are horror stories that do not match some model that you have in your mind about what Ought to be dangerous for people like us.

I am far from promoting reckless behaviour, you are the one who is telling people they should never ever step outside without earmuffs. Do you have any idea how insane that is?
20% of the people have a form of tinnitus, think about that. They do not need your crazy therapy.
Being safe is fine, locking yourself up is not.

But do make some more topics where you want to rediculise health-professionals and start your own cult with a bible of quotes from the forum.

 

[Bill Bauer]

you are the one who is telling people they should never ever step outside without earmuffs

If they expect a high likelihood of being exposed to noises that feel unpleasant to them (or that result in spikes) (e.g., if they will be walking by a busy road where trucks and motorcycles can roar by them), then it is a good idea to wear muffs or ear plugs. If the above is not the case, I never advised wearing hearing protection.

 

[Rajin]

@Bill Bauer good advice from Bill , I alway protect my ears recently ,if I feel will be exposed to any kind of noise for a length of time. I do
expose my ears to noise at the park , in my car , sitting outside etc..

I do feel a different recently with my ear , masking less at night , dishes , paper ripping seem to bother me less now. Is is making kind of sense to me to protect you ears , seem to make it heel slowly. Common sense to use everyone is different.

 

[Jason37]

I see no reason to wear plugs or muffs in your car if it is a normal level of noise. I just left the Audiologist three days ago and asked her many questions about her tinnitus and how she deals with it. She got it from going to so many races here in indy. She's had it for four years and says she has lived a normal life...no muffs or plugs other than loud environments where everyone should wear them.

 

[dm222]

@Bill Bauer good advice from Bill , I alway protect my ears recently ,if I feel will be exposed to any kind of noise for a length of time. I do
expose my ears to noise at the park , in my car , sitting outside etc..

I do feel a different recently with my ear , masking less at night , dishes , paper ripping seem to bother me less now. Is is making kind of sense to me to protect you ears , seem to make it heel slowly. Common sense to use everyone is different.

Problem is if you overprotect you lower the thresholds your ears can handle and then are exposed to a sudden loud noise you were not expecting you can have more damage, and otherwise it would not...