|
|
Vray documentation
About Truespace Archives
These pages are a copy of the official truespace forums prior to their removal somewhere around 2011.
They are retained here for archive purposes only.
Vray documentation // Roundtable
Post by Paul Boland // Jun 1, 2007, 9:41am
|
Paul Boland
Total Posts: 383
|
Sorry, Folks, I can't find where I read this about the seeshell sound being the bounced back sound of blood rushing through your ear. I have two ecyclipedias here but none of them reference seashells, let along the sound. I do believe I read it in a book but it was a good few years back. I'll keep an eye out for it and if I find it, I'll post it. |
Post by JPSofCA // Jun 1, 2007, 9:59am
|
JPSofCA
Total Posts: 300
|
Like the Arco Arena in Sacramento, CA. Its irregularly resonant octagonal shape is what makes King's fans the "loudest" fans [not like I care] of the NBA - it's not really a result of enthusiasm! ;)
Local name: Echo Arena. |
Post by weaveribm // Jun 1, 2007, 11:27am
|
weaveribm
Total Posts: 592
|
Ears are very sensitive sensory organs with a huge dynamic range so you should be able to hear the blood rushing through your brain when you lie quietly in stillness given how close your brain is to your ears and how much pressure your blood is under. Your brain suppresses information that might confuse the organism is why you can't hear these nearby sounds. Which given the logarithmic nature of that sense should be perceived to be very loud indeed, twice as close being four times louder. At one millimeter we'd all be deafened by the sound of our bodily fluids dashing about and the various creakings. Sony and other manufacturers take advantage of our central nervous systems' clever programming to very much reduce the amount of information needed to be stored on media. If you can't actually hear it, no point in storing it. Suppression of redundancy is one of the brain's basic tools, biological programs. Noise from blood vessels is heavily suppressed like the third violin which can't be heard when the brass section is in full flood. It would have to be very quiet in order to hear blood rushing about inside your head/ears. You'd need to be dead to the world, in which case... :)
Peter |
Post by W!ZARD // Jun 3, 2007, 10:12pm
|
W!ZARD
Total Posts: 2603
|
@Paul - I think the blood noise being the cause of the sea sound in a shell is possibly one of those urban legends - I've heard or read the same thing somewhere. <shrug>
@Peter - interesting stuff about the ear! The human nervous systen responds to changes in stimuli not constant stimuli - this is why a ship's engineer cannot hear the engines until something changes in the sound profile. So as I understand it the ear hears the sounds on internal fluid movement and breating heartbeat etc and the nervous system carries those signals to the brain but the brain simply ignores the input and filters it out unless it (the input) changes.
This highlights the difference between industrial deafness and domestic deafness. With industrial deafness the fine hairs in the cochlea get physically damaged and thus the nervous system cannot carry the signals it doesn't hear, to the brain. With so-called domestic deafness (invoking the un PC stereotype of the nagging wife here or the people who live under the airport flightpath) the ears are not physically damaged, the nervous system carries the signals to the brain but the brain does not register the sounds in the same way that it does not register the sounds of internal fluids. Fascinating stuff - almost as interesting as fairy aerodynamics and snail shells :p |
Post by weaveribm // Jun 3, 2007, 11:12pm
|
weaveribm
Total Posts: 592
|
fairy aerodynamics
lol - testing the Tinkerbell flight model "More fairy dust we're losing altitude!" and the crocodile waiting below
On aerodynamics Wizard and the problem for the bee that it can't fly according to the rules. I have a theory that the 'fur' that covers the bee's er, fuselage :) actually helps the air to flow around more smoothly as a laminar flow device. They've never tried fur on a Jumbo it could work :)
With industrial deafness the fine hairs in the cochlea get physically damaged and thus the nervous system cannot carry the signals it doesn't hear, to the brain
Yes my Dad had that from driving a 22RB crane, just before he retired they gave him ear defenders "You're giving me what?"
Menieres means that those fine hairs are damaged badly (by hydraulic pressure in the small sac that holds the organ) but rather than less noise there is much more perceived noise. When I developed it first the room was spinning at 30mph for three hours, I was vomiting air and the noise was as loud as a jet engine. Very scary but it calms down eventually if you're lucky and only get it in one ear
The worst bit was being with the consultant and he asked "Do you mind if I bring in a group of medical students?" When they're all sitting down he describes my symptoms "Well- what could this be?" "Probably an acoustic neuroma..."
So I was glad it only turned out to be Menieres :)
Sorry for the medical report mate I'm a very happy and blessed bunny really! The internal ear and the snail shell have lots in common so it's on-topic :)
Peter |
Post by kena // Jun 4, 2007, 5:08am
|
kena
Total Posts: 2321
|
Personally, I think we are getting off topic, but that is ok - it's bound to happen occationally. For what the sound is you hear in a seashell:
http://www.howstuffworks.com/question556.htm
:D |
Post by weaveribm // Jun 4, 2007, 5:57am
|
weaveribm
Total Posts: 592
|
No it's on-topic look carefully...
http://www.mona.uwi.edu/fpas/courses/physiology/neurophysiology/InnerEar.jpg
:)
I work in medical research so all shell types are very interesting
Aaaggghh! I thought we were in the snail thread sorry!!
Peter |
Post by Paul Boland // Jun 4, 2007, 9:39am
|
Paul Boland
Total Posts: 383
|
Personally, I think we are getting off topic, but that is ok - it's bound to happen occationally. For what the sound is you hear in a seashell:
http://www.howstuffworks.com/question556.htm
:D
Thanks, Kena, seems to have answered all the points of view on this. |
|
