Hi:

The emergency doors of airplanes are coated with synthetic leather. This 
synthetic leather is sound-proof and air-tight. One purpose of this is 
to prevent those on-board from asphyxiation. The other is to protect the 
  ears of those on-board. The sound emitted from the plane exceeds 140 
dB. This is the threshold of pain. Interestingly, sounds above 140 dB 
are not perceived as sound but are instead felt as pain. Hence, if you 
are on-board and the synthetic leather in one or more of the emergency 
doors is faulty, then suddenly everything will seem silent and you'll 
feel like you've got needles piercing your ears. As sounds approach 140 
dB, they will seem distorted -- just as cranking up an amp will cause 
the audio signal to distory. 140 dB is the clipping point of the human 
cochlea. After 140 dB, the enviroment is perceived as totally silent by 
the listener and there is sharp excruciating pain in the cochlea.

One of the disadvantages of synthetic leather is that it can easily be 
damaged by excess heat. If there is a fire on-board and close to the 
emergency door, the leather will lose it's sound-proofing and air-tight 
qualities.


Regards,

Radium

On Dec 30, 12:29 pm, "Green Xenon [Radium]" 
wrote:
> Hi:
>
> The emergency doors of airplanes are coated with synthetic leather. This
> synthetic leather is sound-proof and air-tight. One purpose of this is
> to prevent those on-board from asphyxiation. The other is to protect the
>   ears of those on-board. The sound emitted from the plane exceeds 140
> dB. This is the threshold of pain. Interestingly, sounds above 140 dB
> are not perceived as sound but are instead felt as pain. Hence, if you
> are on-board and the synthetic leather in one or more of the emergency
> doors is faulty, then suddenly everything will seem silent and you'll
> feel like you've got needles piercing your ears. As sounds approach 140
> dB, they will seem distorted -- just as cranking up an amp will cause
> the audio signal to distory. 140 dB is the clipping point of the human
> cochlea. After 140 dB, the enviroment is perceived as totally silent by
> the listener and there is sharp excruciating pain in the cochlea.
>
> One of the disadvantages of synthetic leather is that it can easily be
> damaged by excess heat. If there is a fire on-board and close to the
> emergency door, the leather will lose it's sound-proofing and air-tight
> qualities.

Your skill at getting so many things wrong in such
a compact a space and STILL end up looking like
a total idiot will never cease to boggle the mind.

"Green Xenon [Radium]"  wrote ...
> The emergency doors of airplanes are coated with synthetic leather. 

No.  Not here on planet Earth.  Where are you writing from?

> This synthetic leather is sound-proof and air-tight. 

No, and no.

> One purpose of this is to prevent those on-board from asphyxiation. 

No.

> The other is to protect the ears of those on-board. 

No.

> The sound emitted from the plane exceeds 140 dB. 

No.

>...sounds above 140 dB are not perceived as sound but are 
> instead felt as pain. 

No.

> Hence...

Do you just make this up as you go along?  Its not even very
good fiction. Either learn to check your facts, or you need more
practice in creative writing.

> If there is a fire on-board and close to the emergency door, 
> the leather will lose it's sound-proofing and air-tight qualities.

And in case of an on-board fire, protecting passengers ears
is clearly more important than whatever the fire is doing.
Suggest engaging a sanity-checker along with the fact-
checker.

dpierce.cartchunk.org@gmail.com wrote:

> On Dec 30, 12:29 pm, "Green Xenon [Radium]" 
> wrote:
> 
>>Hi:
>>
>>The emergency doors of airplanes are coated with synthetic leather. This
>>synthetic leather is sound-proof and air-tight. One purpose of this is

	PLEASE DO NOT CROSS-POST THESE TROUBLESOME MESSAGES TO 
ALT.SCI.PHYSICS.ACOUSTICS.

	Angelo Campanella

a écrit dans le message de
news:0ae8e02a-e272-4ed4-b1a8-3da69030ce20@e6g2000prf.googlegroups.com...
>
> Your skill at getting so many things wrong in such
> a compact a space and STILL end up looking like
> a total idiot will never cease to boggle the mind.


                ;-)))

    Happy New Year !

Richard Crowley wrote:
> "Green Xenon [Radium]"  wrote ...
> 
>> The emergency doors of airplanes are coated with synthetic leather. 
> 
> 
> No.  Not here on planet Earth.  Where are you writing from?
> 
>> This synthetic leather is sound-proof and air-tight. 
> 
> 
> No, and no.
> 
>> One purpose of this is to prevent those on-board from asphyxiation. 
> 
> 
> No.
> 
>> The other is to protect the ears of those on-board. 
> 
> 
> No.
> 
>> The sound emitted from the plane exceeds 140 dB. 
> 
> 
> No.
> 
>> ...sounds above 140 dB are not perceived as sound but are instead felt 
>> as pain. 
> 
> 
> No.
> 
>> Hence...
> 
> 
> Do you just make this up as you go along?  Its not even very
> good fiction. Either learn to check your facts, or you need more
> practice in creative writing.
> 
>> If there is a fire on-board and close to the emergency door, the 
>> leather will lose it's sound-proofing and air-tight qualities.
> 
> 
> And in case of an on-board fire, protecting passengers ears
> is clearly more important than whatever the fire is doing.
> Suggest engaging a sanity-checker along with the fact-
> checker.

Well, if the synthetic leather on the emergency door loses its air-proof 
qualities, those in the plane will suffocate as the atmosphere way up 
there is too thin to support human life. There simply isn't enough oxygen.

It is the air-tight qualities of this leather that enables it to soften 
dangerously-loud sounds as well as prevent the breathable air inside the 
plane from escaping outside.

As for fire, there are several reason why they are dangerous even if 
they don't attack the emergency doors' synthetic leather. Those who are 
burning in the plane are in excruciating pain and fear. They may want to 
commit suicide to escape the pain. If an emergency door is burnt open, 
passengers may jump out to escape the agony. If a passenger tried to 
hold onto the plane to cling to life and his/her hand contacts flames 
from the plane, his/her pain reflexes will force him/her to let go and 
fall to his/her death. So much for reflexes!

In addition, if the pilot is on fire or about to be burnt by the flames, 
his fear of the flames and/or pain caused by the thermal burns will 
likely cause him/her to attempt suicide by letting go of the controls. 
Now, even if the pilot tried his/her best to ignore the pain and 
continue manuvering in order to make the landing as safely as possible, 
the pain reflexes will cause him/her to lose control of his/her 
voluntary movements -- the pilot won't we able to operate the plane 
properly due to muscle spasms...

... Now lets say the pilot is somehow able to ignore the pain and 
control his/her reflexes... then the excruciating pain will put the 
pilot in a state of neurogenic and psychogenic shock and extreme 
confusion. As stress hormones [such as endorphins] are released, the 
pilot's level of consciousness will decrease.

Extreme psychological stress [caused by physical pain] can impair 
consciousness and the pilot will no longer be able to navigate. The 
decrease in consciousness is evolution's way to to protect the conscious 
mind from emotional trauma. This is why those who've been in 
psychological agony, can't remember the event. Those who've been in war, 
prison, or were molested as kids, have a hard time remembering the 
incident because it is so traumatic. However, such 'protection' offers 
no benefit to the pilots on-board.

Flames inside the plane are nasty both in terms of their shapes and 
colors. They resemble the orangish-yellow--reddish-pink flames of that 
resulting from ignited wood, cotton, grass, petroleum, and other 
compounds that burn with that yellow nasty-shaped flames. These shapes 
and colors evoke intense primal fears in us humans. The flames that 
plagued our pre-historic ancestors were orangish-yellow with a hint of 
reddish-pink. Forest fires and grassland fires. Hence, when we see these 
colors and shapes, our ancient fears are triggered. Pre-historic humans 
were burnt by these flames. The wounds resulting from these flames were 
excruciatingly painful. So painful that they caused neurogenic shock. 
The burn victims and the bystanders started developing intense fears of 
these flames. Equally frightening was these burn wounds looked like 
white foam. White due to thermal denaturing of pigments -- such as 
melanin. Foamy due to denaturing of proteins in the skin. Also, such 
heat from flames dehydrated the skin, further making the wounds 
frightening in appearance. This is why orangish-yellow--reddish-pink 
flames are so terrifying to us.


Yeah, yeah I know. Much of this post is exteeeeeeeeeeeeereeeeeeeeeeemely 
OT. Please don't get upset at me.

Angelo Campanella wrote:


>     PLEASE DO NOT CROSS-POST THESE TROUBLESOME MESSAGES TO 
> ALT.SCI.PHYSICS.ACOUSTICS.


How are my posts off-topic to ASPA? I am talking about sound. Sound is 
acoustics. So how are these messages 'troublesome'?

On Sun, 30 Dec 2007 16:57:28 -0800, "Green Xenon [Radium]"
 wrote:

>Yeah, yeah I know. Much of this post is exteeeeeeeeeeeeereeeeeeeeeeemely 
>OT. Please don't get upset at me.

Virtually all of this post is simply, factually wrong.

I pity you, for whatever the psychological problems that cause you to
write such things.

"Green Xenon [Radium]" wrote ...
> Well, if the synthetic leather

It is not "synthetic leather".

> on the emergency door

The cosmetic covering on the "emergency door"
is not responsible for the atmospheric integrity of
the cabin, nor for any significant noise mitigation.

> loses its air-proof

"Synthetic leather" is not "air-proof".

> qualities, those in the plane will suffocate as the atmosphere way up 
> there is too thin to support human life. There simply isn't enough 
> oxygen.
>
> It is the air-tight qualities of this leather that enables it to 
> soften dangerously-loud sounds as well as prevent the breathable air 
> inside the plane from escaping outside.

There are hardly any two wrords in sequence that are correct.
The reason people find your "questions" to be "troublesome"
is that your beginning "assumptions" are completely incorrect
from end to end.

The cosmetic outer surface of an aircraft passenger
compartment are not used for "sound-proofing". They
are used for their appearance, and their cost-effective
durability to passenter wear-n-tear, and regular
cleaning and maintenance.  Other parts of aircraft
design and constuctoin are used for noise mitigation.

Try doing some original research before stringing your
random invented "facts" into another of your absurd
"questions".

Green Xenon [Radium] wrote:

> Well, if the synthetic leather on the emergency door loses its air-proof 
> qualities, those in the plane will suffocate as the atmosphere way up 
> there is too thin to support human life. There simply isn't enough oxygen.
>

Nonsense. it would be leaking air, not losing all of the air.
Additionally, more air could be delivered to the cabin to compensate for 
a leak.  Have you ever been on a plane? Do you remember the demo they 
give where they talk about masks dropping down?

> As for fire, there are several reason why they are dangerous even if 
> they don't attack the emergency doors' synthetic leather. Those who are 
> burning in the plane are in excruciating pain and fear.

If there is a problem with noise, it is possible to block some of the 
noise from your inner ear.

Green Xenon [Radium] wrote:
> Richard Crowley wrote:
>> "Green Xenon [Radium]"  wrote ...
>>
>>> The emergency doors of airplanes are coated with synthetic leather. 
>>
>>
>> No.  Not here on planet Earth.  Where are you writing from?
>>
>>> This synthetic leather is sound-proof and air-tight. 
>>
>>
>> No, and no.
>>
>>> One purpose of this is to prevent those on-board from asphyxiation. 
>>
>>
>> No.
>>
>>> The other is to protect the ears of those on-board. 
>>
>>
>> No.
>>
>>> The sound emitted from the plane exceeds 140 dB. 
>>
>>
>> No.
>>
>>> ...sounds above 140 dB are not perceived as sound but are instead 
>>> felt as pain. 
>>
>>
>> No.
>>
>>> Hence...
>>
>>
>> Do you just make this up as you go along?  Its not even very
>> good fiction. Either learn to check your facts, or you need more
>> practice in creative writing.
>>
>>> If there is a fire on-board and close to the emergency door, the 
>>> leather will lose it's sound-proofing and air-tight qualities.
>>
>>
>> And in case of an on-board fire, protecting passengers ears
>> is clearly more important than whatever the fire is doing.
>> Suggest engaging a sanity-checker along with the fact-
>> checker.
> 
> Well, if the synthetic leather on the emergency door loses its air-proof 
> qualities, those in the plane will suffocate as the atmosphere way up 
> there is too thin to support human life. There simply isn't enough oxygen.
> 
> It is the air-tight qualities of this leather that enables it to soften 
> dangerously-loud sounds as well as prevent the breathable air inside the 
> plane from escaping outside.
> 
> As for fire, there are several reason why they are dangerous even if 
> they don't attack the emergency doors' synthetic leather. Those who are 
> burning in the plane are in excruciating pain and fear. They may want to 
> commit suicide to escape the pain. If an emergency door is burnt open, 
> passengers may jump out to escape the agony. If a passenger tried to 
> hold onto the plane to cling to life and his/her hand contacts flames 
> from the plane, his/her pain reflexes will force him/her to let go and 
> fall to his/her death. So much for reflexes!
> 
> In addition, if the pilot is on fire or about to be burnt by the flames, 
> his fear of the flames and/or pain caused by the thermal burns will 
> likely cause him/her to attempt suicide by letting go of the controls. 
> Now, even if the pilot tried his/her best to ignore the pain and 
> continue manuvering in order to make the landing as safely as possible, 
> the pain reflexes will cause him/her to lose control of his/her 
> voluntary movements -- the pilot won't we able to operate the plane 
> properly due to muscle spasms...
> 
> ... Now lets say the pilot is somehow able to ignore the pain and 
> control his/her reflexes... then the excruciating pain will put the 
> pilot in a state of neurogenic and psychogenic shock and extreme 
> confusion. As stress hormones [such as endorphins] are released, the 
> pilot's level of consciousness will decrease.
> 
> Extreme psychological stress [caused by physical pain] can impair 
> consciousness and the pilot will no longer be able to navigate. The 
> decrease in consciousness is evolution's way to to protect the conscious 
> mind from emotional trauma. This is why those who've been in 
> psychological agony, can't remember the event. Those who've been in war, 
> prison, or were molested as kids, have a hard time remembering the 
> incident because it is so traumatic. However, such 'protection' offers 
> no benefit to the pilots on-board.
> 
> Flames inside the plane are nasty both in terms of their shapes and 
> colors. They resemble the orangish-yellow--reddish-pink flames of that 
> resulting from ignited wood, cotton, grass, petroleum, and other 
> compounds that burn with that yellow nasty-shaped flames. These shapes 
> and colors evoke intense primal fears in us humans. The flames that 
> plagued our pre-historic ancestors were orangish-yellow with a hint of 
> reddish-pink. Forest fires and grassland fires. Hence, when we see these 
> colors and shapes, our ancient fears are triggered. Pre-historic humans 
> were burnt by these flames. The wounds resulting from these flames were 
> excruciatingly painful. So painful that they caused neurogenic shock. 
> The burn victims and the bystanders started developing intense fears of 
> these flames. Equally frightening was these burn wounds looked like 
> white foam. White due to thermal denaturing of pigments -- such as 
> melanin. Foamy due to denaturing of proteins in the skin. Also, such 
> heat from flames dehydrated the skin, further making the wounds 
> frightening in appearance. This is why orangish-yellow--reddish-pink 
> flames are so terrifying to us.
> 
> 
> Yeah, yeah I know. Much of this post is exteeeeeeeeeeeeereeeeeeeeeeemely 
> OT. Please don't get upset at me.

Dude! Where'd you get the 'shrooms?