You don't accept the proof when its given, so what is the point? Remember the argument about "incompressible fluid" and sound waves? Still believe that one?
As a matter of fact...😉
What proof? Whipped cream? "Just because"?
Do you even understand what the question is?
We got married in Vegas. You really wouldn't want to go there.😀
You can't catch all of the wave, it's bigger than you are, even when you're in heels.
What we hear is a change in pressure. The wave propagates as zones of compression and rarefaction, i.e. pressure differentials. We detect the change in pressure against our eardrum. We also detect the change in pressure between the inside and outside of our chest.
John, doesn't all this sound a bit familiar? Remember the discussion about sound traveling as a compression wave in water? We are heading down the same road and will arrive at the same destination.
Sheldon
Leave those photos outta this. 😀
So, we don't catch all of the wave yet we can perceive what the frequency is...interesting. How can even just a little bit of the huge wave make it inside our ear canal and bump up against our eardrums? How can it move the eardrum unless it reflects off of it?
It's been a while since I've had a knock down drag out discussion.
I prefer to think about things and postulate my own ideas sometimes, rather than just sitting back and either living in ignorance or accepting everything I hear as fact. Inquisitive mind, you know?
BTW if you are implying that I embarrassed myself during the "water debate", you are dead wrong.
I caught this on on the head - not all of it, but enough. Well, actually didn't quite catch it, as you can see. But I did feel it. Frequency was about 17 seconds.
Sheldon
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We were all friends after the water debate. The phase changes of water are not very intuitive, I finally found a contradiction that made only one path possible.
You got me on what is known as (in the Law and Order type programming) a "technicality" that only fits with the peculiarity of water at a specific temperature.
No matter. I'm gathering data for round 2...😀
In the meantime, anyone want to explain to me how a low frequency sound wave can go around a bend in a pipe without reflecting?
The "wave" doesn't go inside your ear. The air pressure outside your ear changes.
Because the the sound wave is a series of compressions and rarefactions, (changes in air pressure), your ear drum moves.
Really high frequencies might reflect in your ear canal or reflect off your eardrum cuz their wavelengths are short enough to fit in there. But with long wavelengths all you get is the pressure effect. Nerf ball, right?
Something wrong with the "quote" thingy.
I tried to avoid that implication in my phrasing. I was pointing out the parallels. In that thread, you held on to an intuitive impression, because it fit with your personal experience. That's not a bad starting point. The physics and math that explained the phenomenon require some background to completely grasp. Not everyone has that. Again, not a problem. But a number of people tried to bridge the gap between the well known physics, by presenting the math and some analogies to spark the intuitive process. These attempts were dismissed at every turn, in your words "over and over". People have studied and made the effort to master some of these things. If you haven't, fine. Everyone has more gaps in their knowledge than bricks. That's where teachers come in. But a teacher can't make anyone learn. The student has to want to learn, and make the effort to understand what is being taught.
Sheldon
I assume you have worn headphones? Or earbuds? I have a cheap pair of Panasonics but they are pretty good at low frequency reproduction.
The transducer moves in and out creating a wave. The wave (impossible as it may seem) contacts and reflects off of your eardrum. Now call the wave whatever you like: pressure, compression, rarefaction, there is still an energy transfer which is a physical thing.
If a low frequency wave cannot act on the sidewall of a pipe (let us have it your way - pressure) then it cannot act upon the membrane of your eardrum.
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Sheldon I appreciate your encouragement to get me to accept and conform. It's just not my bag, man 😀
"TL design and other catastrophes"
Guys, We need a new name for this thread, agreed?
Suggestions please.
Now that it's starting to look like This Thread, maybe it should be moved to the lounge or bunged under "everything else".
Which reminds me...
If you put the nerf ball behind the airplane, will it help the plane take off, or just bounce off?
Either way, it answers one of these arguments.
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Are "acting upon" and "reflecting off" the same thing? You seem to be implying that they are. Are they?
That's why your eardrum is at the end of the ear canal - as a terminus.
If your eardrum was on the sidewall, the waves would go straight past it and you wouldn't hear anything. Duh!
😀
Well put. Maybe this thread will amount to something. So far its been pretty narrow ...
Because it's a longitudinal, not transverse, wave. It travels as compressions and rarefactions in the air - thus, trying to visualise it as a wiggly line that bounces off things is absurd.
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