Does sound get louder as air pressure increases?

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notfred

Lifer
Feb 12, 2001
38,241
4
0
Originally posted by: FFMCobalt
Originally posted by: Jmmsbnd007
I know that as it decreases it gets quieter, but does it work vise-versa?
Click to expand...

Now... why in the HELL would it not work both ways? :confused:

lol :p
Click to expand...

Seriously, think about it for one minute (these are hypothetical values):

Sound volume in room with 14psi air pressure = 20db

reduce pressure in room to 8psi

Sound pressure is now 17db

Raise pressure back to 14 psi

What do you think the sound volume is?
 
J

Jmmsbnd007

Diamond Member
May 29, 2002
3,286
0
0
Originally posted by: notfred
Originally posted by: FFMCobalt
Originally posted by: Jmmsbnd007
I know that as it decreases it gets quieter, but does it work vise-versa?
Click to expand...

Now... why in the HELL would it not work both ways? :confused:

lol :p
Click to expand...

Seriously, think about it for one minute (these are hypothetical values):

Sound volume in room with 14psi air pressure = 20db

reduce pressure in room to 8psi

Sound pressure is now 17db

Raise pressure back to 14 psi

What do you think the sound volume is?
Click to expand...
Well, obviously, it goes back up. But I was wondering if above-ATM pressures would amplify sound to a higher level.
 
N

notfred

Lifer
Feb 12, 2001
38,241
4
0
Originally posted by: Jmmsbnd007<brWell, obviously, it goes back up. But I was wondering if above-ATM pressures would amplify sound to a higher level.
Click to expand...

What significance does the number 1.0ATM have? It's completely arbitrary selected as a human measurement only because it's common around sea level on this particular planet. It really has no significance in physics.
 
MrDudeMan

MrDudeMan

Lifer
Jan 15, 2001
15,069
94
91
Originally posted by: notfred
Originally posted by: Jmmsbnd007<brWell, obviously, it goes back up. But I was wondering if above-ATM pressures would amplify sound to a higher level.
Click to expand...

What significance does the number 1.0ATM have? It's completely arbitrary selected as a human measurement only because it's common around sea level on this particular planet. It really has no significance in physics.
Click to expand...

exactly. ATM is only a description of what we experience on most of the earths surface (well, the parts of it near sea-level as notfred said)
 
B

bleeb

Lifer
Feb 3, 2000
10,868
0
0
C'mon guys.. lets not turn this into another 0.9999... != 1 type thread. Use your brains.
 
J

Jmmsbnd007

Diamond Member
May 29, 2002
3,286
0
0
Originally posted by: MrDudeMan
<blockquote>Quote
Originally posted by: notfred
<blockquote>Quote
Originally posted by: Jmmsbnd007<brWell, obviously, it goes back up. But I was wondering if above-ATM pressures would amplify sound to a higher level.
Click to expand...

What significance does the number 1.0ATM have? It's completely arbitrary selected as a human measurement only because it's common around sea level on this particular planet. It really has no significance in physics.[/quote]

exactly. ATM is only a description of what we experience on most of the earths surface (well, the parts of it near sea-level as notfred said)[/quote]
I was referring to a normal air pressure in a room around sealevel, close to 15 psi. Sheesh.
 
S

spidey07

No Lifer
Aug 4, 2000
65,469
5
76
this must be news to me. why on earth would sound pressure change depending on air pressure?
 
S

spidey07

No Lifer
Aug 4, 2000
65,469
5
76
Originally posted by: spidey07
this must be news to me. why on earth would sound pressure change depending on air pressure?
Click to expand...

thought about it for a while...makes sense.
 
E

Eli

Super Moderator | Elite Member
Oct 9, 1999
50,419
8
81
Originally posted by: spidey07
this must be news to me. why on earth would sound pressure change depending on air pressure?
Click to expand...
I'm not exactly sure, but does it have to do with the density of the medium?

Hmm.. question, what happens to sound in space? Would it be hard to hear in space? Impossible?
 
S

shimsham

Lifer
May 9, 2002
10,765
0
0
Originally posted by: Eli
Originally posted by: spidey07
this must be news to me. why on earth would sound pressure change depending on air pressure?
Click to expand...
I'm not exactly sure, but does it have to do with the density of the medium?

Hmm.. question, what happens to sound in space? Would it be hard to hear in space? Impossible?
Click to expand...

in space, no one can hear you scream? or something like that....:beer:

 
L

LongCoolMother

Diamond Member
Sep 4, 2001
5,675
0
0
Originally posted by: shimsham
Originally posted by: Eli
Originally posted by: spidey07
this must be news to me. why on earth would sound pressure change depending on air pressure?
Click to expand...
I'm not exactly sure, but does it have to do with the density of the medium?

Hmm.. question, what happens to sound in space? Would it be hard to hear in space? Impossible?
Click to expand...

in space, no one can hear you scream? or something like that....:beer:
Click to expand...

no atmosphere in space (practically a vacuum). theres nothing for soundwaves to travel through.
 
Y

Yax

Platinum Member
Feb 11, 2003
2,866
0
0
Originally posted by: Jmmsbnd007
I know that as it decreases it gets quieter, but does it work vise-versa?
Click to expand...

Hmm, so if we decrease the air pressure to the point where everything is quite, then increase the pressure back up, everything would remain quiet since it does not work vise-versa. Librarians will be thrilled.
 
S

shimsham

Lifer
May 9, 2002
10,765
0
0
Originally posted by: LongCoolMother
Originally posted by: shimsham
Originally posted by: Eli
Originally posted by: spidey07
this must be news to me. why on earth would sound pressure change depending on air pressure?
Click to expand...
I'm not exactly sure, but does it have to do with the density of the medium?

Hmm.. question, what happens to sound in space? Would it be hard to hear in space? Impossible?
Click to expand...

in space, no one can hear you scream? or something like that....:beer:
Click to expand...

no atmosphere in space (practically a vacuum). theres nothing for soundwaves to travel through.
Click to expand...

i knew that, just fooling around:p

 
E

Eli

Super Moderator | Elite Member
Oct 9, 1999
50,419
8
81
Originally posted by: LongCoolMother
Originally posted by: shimsham
Originally posted by: Eli
Originally posted by: spidey07
this must be news to me. why on earth would sound pressure change depending on air pressure?
Click to expand...
I'm not exactly sure, but does it have to do with the density of the medium?

Hmm.. question, what happens to sound in space? Would it be hard to hear in space? Impossible?
Click to expand...

in space, no one can hear you scream? or something like that....:beer:
Click to expand...

no atmosphere in space (practically a vacuum). theres nothing for soundwaves to travel through.
Click to expand...
That's what I thought.

So then what happens to the sound energy in space? Does it just dissipate a few feet or meters(or inches?) from the source?
 
J

Jmmsbnd007

Diamond Member
May 29, 2002
3,286
0
0
Originally posted by: cheapbidder01
Originally posted by: Jmmsbnd007
I know that as it decreases it gets quieter, but does it work vise-versa?
Click to expand...

Hmm, so if we decrease the air pressure to the point where everything is quite, then increase the pressure back up, everything would remain quiet since it does not work vise-versa. Librarians will be thrilled.
Click to expand...
Sigh, I was just being inaccurate. I meant to say something along the lines if we increased the air pressure to double the current pressure (assume maybe... 30 psi from 15), would that double the volume of the sound? /me expects a volume vs pressure debate now
 
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