In Reply to: In Theory You're Correct, But In Actuality You're Wrong! posted by thetubeguy1954 on March 15, 2008 at 09:35:37:
> In Theory You're Correct, But In Actuality You're Wrong!
Fair enough. A clear statement of belief/intolerance/ego suppressing a reality you clearly recognise.
> In theory applying the same force to accelerate a loudspeaker's driver in the
> opposite direction will slow down it at the same rate it's accelerated but,
> that only occurs with a theoretically perfect loudspeaker's driver. However a
> perfect driver doesn't exist.
No it applies always (at least on the scales we are considering) and is what your school teacher called Newton's second law.
> I may be incorrect in my terminology but I believe the inability of a
> driver to stop as fast as it accelerates is sometimes refered to as a
> driver ringing!
If it helps you to think in terms of negatives a driver that is slow to stop is just as slow to start.
> Finally like every other type of driver used the plasma drivers must move air
> which mass, but unlike every other type of driver used the plasma drivers have
> no mass inherent to themselves! Thus once a signal has ceased to be applied
> there's no mass that has to return to the driver's neutral state.
The plasma moves air which has mass/inertia. Once the signal ceases the air will continue moving due to its inertia/mass until the energy associated with its motion has been dissipated.
> No other driver I know of can make that same claim. Perhaps the easiest way to
> envision this would be to apply a DC signal to a driver. Every driver would
> either move out or in ---depending on the polarity of the signal. Now once we
> removed that DC signal every one of these drivers ---accept the plasma
> driver--- would need to release the energy it stored when the DC signal was
> applied in order to return back it's neutral state when no signal is applied
> whereas the plasma driver would simply stop. See the difference?
By passing a varying current through air a plasma creates two distinct types of sound source: a nonlinear monopole due to heating/cooling the air and a reasonably linear but weaker dipole from the fast moving charged particles exchanging momentum with the air. When you turn off your DC source of heat the air will contract generating acoustic waves. In fact, if you have applied you DC signal long enough to reach equilibrium you will nothing until you turn it off when you will hear a bang.
In addition, directly modulating a plasma with an audio signal will produce an acoustic output with typically 10s of percent distortion. It is not inherently a good transducer which is why people mess about with Tesla coils, modulation and the like to address the problem.
> Now if you wish to foolishly continue arguing this point go ahead but, you're
> wrong plain & simple.
Everybody here is well aware of your view that you are right and everyone else is wrong regardless but what is interesting is just how far it can extend.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: In Theory You're Correct, But In Actuality You're Wrong! - andy19191 03/15/0812:34:33 03/15/08 (19)
- I Still Believe In Actuality You're Wrong & Here's Why! - thetubeguy1954 11:04:12 03/16/08 (15)
- RE: I Still Believe In Actuality You're Wrong & Here's Why! - andy19191 13:13:33 03/16/08 (14)
- There's A Difference Between What Happens In Reality Andy - thetubeguy1954 07:26:38 03/17/08 (7)
- RE: There's A Difference Between What Happens In Reality Andy - andy19191 08:45:55 03/17/08 (6)
- Are You Really This Dense? - thetubeguy1954 11:12:44 03/17/08 (5)
- RE: Are You Really This Dense? - andy19191 12:32:59 03/17/08 (4)
- RE: Are You Really This Dense? - thetubeguy1954 13:32:53 03/17/08 (3)
- RE: Are You Really This Dense? - andy19191 14:44:06 03/17/08 (2)
- Andy Doesn't Really Want To Discuss Audio Instead He's Using AA Members As "Guinea Pigs" To Study! - thetubeguy1954 08:54:56 03/18/08 (0)
- Continuing to provoke will only result in a rational outburst - AJinFLA 17:48:28 03/17/08 (0)
- Sure Andy. Keep prodding until the Rational Subjectivist goes berserk - AJinFLA 14:56:49 03/16/08 (5)
- RE: Sure Andy. Keep prodding until the Rational Subjectivist goes berserk - andy19191 15:40:34 03/16/08 (4)
- RE: Sure Andy. Keep prodding until the Rational Subjectivist goes berserk - thetubeguy1954 07:42:32 03/17/08 (2)
- RE: Sure Andy. Keep prodding until the Rational Subjectivist goes berserk - andy19191 09:11:21 03/17/08 (1)
- RE: Sure Andy. Keep prodding until the Rational Subjectivist goes berserk - thetubeguy1954 11:46:20 03/17/08 (0)
- RE: Sure Andy. Keep prodding until the Rational Subjectivist goes berserk - AJinFLA 17:32:15 03/16/08 (0)
- RE: In Theory You're Correct, But In Actuality You're Wrong! - morricab 16:42:23 03/15/08 (2)
- RE: In Theory You're Correct, But In Actuality You're Wrong! - andy19191 13:36:20 03/16/08 (1)
- RE: In Theory You're Correct, But In Actuality You're Wrong! - morricab 13:13:32 03/17/08 (0)