Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

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RE: One last thought

Posted by stehno (M) on May 7, 2015 at 17:36:57

In Reply to: RE: One last thought posted by Palustris on May 7, 2015 at 07:49:43:

You're just being silly.

Let's think about this. Now you didn't, but let's think about this.

First, it should be common knowledge that the air-borne vibrations are sound waves traveling through the air. In other words, the air becomes excited with sound vibrations. Yet, you're saying that when air is confined within a bladder, the air becomes an absorbent? Hardly.

What I speculate is happening with the air-filled bladder is that like a component's poorly anchored and secured cheap stamped sheet-metal top plate, is that the air within the bladder also becomes excited and hence, the bladder itself together with the air within will actually vibrate in sympathy with any vibrations transmitted from the component or even from the sound waves in the air outside making contact with the bladder.

As for sand or kitty litter, is not the mechanical energy more free to travel within the component than exit out in the kitty litter or sand? In other words, doesn't the litter or sand create a greater resistance for the mechanical energy? Doesn't energy always seek the path of least resistance?

Let's go back to the tuning fork held in your hand. Your hand may well be a reasonable substitute for the kitty litter and sand since it too makes for a very poor conductor for mechanical energy to travel. Yet, when the tines of that tuning fork held in your hand are struck, why do the tines continue to ring audibly upwards of 120 seconds or more?

Yet, according to your thinking, the tines shouldn't ring at all as the air temperature in the room is heating up, in which case the purpose of the tuning fork's existence (at least in the doctor's office) has been defeated.

As for at least the air-borne vibrations converting to heat and I suspect the internally-generated vibrations. Well, it is known by some that vibrations induce friction and friction induces heat, but generally that only observable or impacting when certain intensities or velocities are reached.

For example, when I open and shut my car door, there is friction at the hinges. And though there may well be an ever so slight change in hinge temperature, it is completely negligible, unless perhaps the car door weighed 5000 lbs. and is inducing horrific friction at the hinges with one swing of the door. Same thing if I open and shut the car door 20 times in 1 minute. Now if I were able to open and shut my car door 500 or 1000 times per minute you may be onto something.

If all vibrations transfer to heat as you seem to want to believe, then we'd all probably be listening to music in dead silence in our thongs. Rather than just you.

Edits: 05/07/15

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