Bagel and Creamcheese
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FOAD.
S
Strandberg Junkie
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member
Things there can only be ONE of on Rig Talk:
1. Outspoken liberal.
2. Acoustics background.
Music = Sound
Guitars need speakers
How can there be more than one person with an acoustics background here?
1. Outspoken liberal.
2. Acoustics background.
Music = Sound
Guitars need speakers
How can there be more than one person with an acoustics background here?
Bagel and Creamcheese
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Thank you for posting what I was thinking.
Y
YabbaDabbaDoo
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You're a proven liar MANY times over so what makes THIS claim legit............................
Bagel and Creamcheese
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So, you're saying Donnie's wrong and therefore you have no knowledge of sound. Sounds 'legit'.
S
Strandberg Junkie
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member
Hey B&C, we had one of these at my last job.
This is the exact opposite of LESS attenuated.
Ours was about half this size. Freaky as all hell standing inside with the door closed.
Feels like you're in negative pressure - some people can't take being inside for longer
than a few seconds cause it's so alien an environment.
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YabbaDabbaDoo
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I never said Donnie (aka: you) was wrong about sound as I didn't even really process it.
I was saying he was wrong about his hardlined denial of possessing a stable of ALTS.....................
Sound at those depths? NOBODY really knows because all ANYONE can do is hypothesize.
Unless you're actually down there doing realtime testing all you're doing is pissing in the wind Fella.
Bagel and Creamcheese
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What do you mean, "sound at those depths"? Are you saying there's no sound down there? Or are you saying we couldn't hear a sound from there? I have no idea what you're trying to say.
Explain yourself man!
jaxadam
Well-known member
What do you suggest these sound paths are doing?
In my quote, notice the word I have colored red. ...creates an amplifying effect.
I said amplifying effect. I didn't say there was a mechanical input in the system that literally amplifies the source. I said amplifying effect, so I take your above quote as now being in agreement with my original statement.
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YabbaDabbaDoo
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I'm saying I have no idea and neither do YOU................
Facts are born from doing and not hypothesizing...................pretty FUCKING clear isn't it.
Ben Waylin
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Billionaires are good people..
.. deep down.
.. deep down.
Bagel and Creamcheese
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This is what you learned at Harvard???
How do you think earthquakes are located??? Sound travels through both rock and water. Right through the whole planet. And you're saying we don't know if there's sound at the bottom of the ocean???
What the fuck are you trying to say? Be specific. You're being intentionally vague in your replies because your pea brain realizes you've put your foot in your big fucking mouth and you're spewing more shit.
Harvard! Hahahahahahahahaha. You couldn't find it on a map of New England.
Bagel and Creamcheese
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It's a cartoon. Sound waves don't change direction unless they are refracted or reflected. They've simplified a bunch of shallow angle reflections into a curve for simplicity.What do you suggest these sound paths are doing?
In my quote, notice the word I have colored red. ...creates an amplifying effect.
I said amplifying effect. I didn't say there was a mechanical input in the system that literally amplifies the source. I said amplifying effect, so I take your above quote as now being in agreement with my original statement.
Can we agree that the word amplify means "to make bigger/louder"?
jaxadam
Well-known member
We are talking about sound waves bending in a thermal gradient underwater, which is the crux of the entire conversation based on the Navy acoustical detection. And yes, sound wave propagation "bends" in a thermal gradient. No, they don't "not bend" as you suggested in your original post. So I'll just stay in agreement with my original post and a plethora of other acoustical PhDs that use the word "bend" as well. I'll also stand by my original post that this effect creates the bending effect that makes the sound seem to have an amplified effect.
If you don't like the word "bend" I suggest you get in touch with the author of this page and tell him that someone in the Rig Talk OT says he's chosen the wrong word.
https://www.acs.psu.edu/drussell/demos/refract/refract.html
Clearly you're not the type of person who is willing to have a constructive conversation, or back down when faced with opposing evidence, terminology, or "cartoons" so carry on by yourself.
Stripped Rights
Well-known member
Stop arguing with yourself Donnie.
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YabbaDabbaDoo
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Fuck me.............you're right............I went to Harvard in Argentina........I've been duped!
What I did learn was that facts are based on PROVEN realtime studies and when somebody serves up a recall of a hallucination whilst self pleasuring their own sphincter you must pity them as their self grandeur of standing is a terminal mental condition.
Recording and counting your own bath tub farts does not make you an expert in the field of underwater acoustics.
I believe I've articulated my position and understanding crystal clear. If not, take the dick out your ears and lift your head up from your mother's vaginal area so you can see clearly.
So, we're ALL totally clear now....................................Imbecilic fuckwit.
Ben Waylin
Banned
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All these silly little guitar forums have cliques.. where little groups of faggots who can't play worth a shit, band together..
.. but this is the first time I've seen where the clique was one fucking schizophrenic person using a bunch of sock-puppets accounts.
Bagel and Creamcheese
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Bagel and Creamcheese
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If you're going to post a link to prove your point, it's best to read it first.
Refraction of Sound Waves
| Suppose you are camping on the shore of a lake which is not too wide, maybe 1/2 a mile across or so. During the day you can see campers on the other side of the lake, but you cannot hear them. At night, however, you can not only see the campers on the other side of the lake but you can also hear their conversations as they sit around their camp fire. This phenomena is due to the refractionof sound waves. The speed of a wave depends on the elastic and inertia properties of the medium through which it travels. When a wave encounters different medium where the wave speed is different, the wave will change directions. 
| 
In the above animation a spherical wave pulse propagates in a medium where the wave speed is constant in all directions. The wave expands outwards as an ever expanding circle, with the wave traveling at the same speed in all directions. Since the wave speed is the same everywhere, there is no refraction, and the wave does not change direction as it propagates. |
In acoustics, however, sound waves usually don't encounter an abrupt change in medium properties. Instead the wave speed changes gradually over a given distance. The speed of a sound wave in air depends on the temperature (c=331 + 0.6 T) where T is the temperature in oC. Often the change in the wave speed, and the resulting refraction, is due to a change in the local temperature of the air. For example, during the day the air is warmest right next to the ground and grows cooler above the ground. This is called a temperature lapse. Since the temperature decreases with height, the speed of sound also decreases with height. This means that for a sound wave traveling close to the ground, the part of the wave closest to the ground is traveling the fastest, and the part of the wave farthest above the ground is traveling the slowest. As a result, the wave changes direction and bends upwards. This can create a "shadow zone" region into which the sound wave cannot penetrate. A person standing in the shadow zone will not hear the sound even though he/she might be able to see the source. The sound waves are being refractedupwards and will never reach the observer.
| 
The animation above shows the propagation of a spherical wave pulse in a medium where the wave speed in the x-direction is constant, but where the speed in the vertical y-direction decreases with height (c = 1 - 0.05y)As a result the wave changes direction and bends upwards. |
A temperature inversionis when the temperature is coolest right next to the ground and warmer as you increase in height above the ground. Since the temperature increases with height, the speed of sound also increases with height. This means that for a sound wave traveling close to the ground, the part of the wave closest to the ground is traveling the slowest, and the part of the wave farthest above the ground is traveling the fastest. As a result, the wave changes direction and bends downwards. Temperature inversions most often happen at night after the sun goes down when the ground (or water in a lake) cools off quickly, while the air above the ground remains warm. This downward refraction of sound is why you can hear the conversations of campers across the lake, when otherwise you should not be able to hear them. (remember that they can probably hear you too!)
| 
The animation above shows the propagation of a spherical wave pulse in a medium where the wave speed in the x-direction is constant, but where the speed in the vertical y-direction increases with height (c = 1 + 0.05y)As a result the wave changes direction and bends downwards. |
Refraction of sound waves influenced the outcome of several Civil War Battles!
jaxadam
Well-known member
Yes I did. Refraction is the basis for it bending. You hit the nail on the head when you basically admitted that it bends due to refraction. But you didn't hit the nail on the head when you originally said it doesn't "bend".
So like I said, get in touch with all of the other authors I've quoted that used the word bend and tell them to change their terminology.