Posted on 11/25/2009 6:46:41 PM PST by TigerLikesRooster
A vibration will tell. Wood will bounce at rather high frequency relative to balance, masonry will just ‘feel’ hollow.
Every once in awhile get a call from somebody that has terrible vibrations in their house. Of course all of their complaints to the city, etc. are ignored after a brief visit, and they are just deemed “nuts”.
In one case I recorded a strong, low vibration using a sensor in their toilet reservoir. More sleuthing determined that the main trunk from a sewage pumping station went by her house, and that was probably the cause. She ended up moving.
It was pretty weird, and I would not have believed it if I hadn’t measured the vibrations along with her notes of when the vibrations were worst, etc. (Sensors on her wall and floor didn’t record anything, and the one in the water was still VERY low).
Yep.
You feel it.
Put your hand to the ground. I have saved lives and that’s all I’ve got to say.
“It can make you whole body shake.”
Yeah. It’s true, sorta’. Having spent a career in extremely high noise environments (turbine engines), it’s pretty well known that ear protection goes only so far in protecting your hearing. At some point, bone conduction overpowers any ear protection you’re using. High freq. turbine noise can best be described as making me “crawly”. Probably has to do with having all of the air spaces in the body giving your viscera a deep massage. Not terribly sure if it is hard on things besides my hearing, but I would not be surprised if it was.
If you press you earphone hard on bones around the ear cavity, it does enhance effect from music. Bone conduction can be indeed powerful.
This is especially true if the sound is low frequency in my experience.
We have discovered the tactile equivalent of lip reading.
The very next time that my wife complains that I’m not listening, I going to strip.
She better hope that we’re home.
thanks, bfl
So what happens when I get old and my skin becomes hard of hearing? How many batteries will my skin’s hearing aid take?
And just where, exactly, do those batteries go? Pics, diagrams, and charts would be most welcome. Well, almost...
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