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Radium
 
Posts: n/a
Default Theoretical Acoustic Experiment

A *theoretical* speaker:

1. Uses electricity for power
2. Converts any generated heat back to electricity at the quantum
level. Due to this, no parts of the speaker can overheat.
3. The mechanical parts of the speaker are strong enough to withstand
up to 350 dB at any given frequency of sound without any injury,
distortion, or clipping.
4. As already said, cannot overheat becuase any heat is converted back
to electricity to energize the speaker.
5. Its non-acoustic electric parts can suffer non-thermal,
non-mechanical electrical injuries, though.
6. Its diaphragm is 40 feet wide, 40 feet long, 40 feet high, 40 feet
deep

What will happen if the electrical equivalent of a 10^500 gigaBel,
10^500 gigahertz, pure sine-wave is forced through the electric parts
of this speaker's diaphragm
  #2   Report Post  
CJT
 
Posts: n/a
Default Theoretical Acoustic Experiment



Radium wrote:

A *theoretical* speaker:

1. Uses electricity for power
2. Converts any generated heat back to electricity at the quantum
level. Due to this, no parts of the speaker can overheat.
3. The mechanical parts of the speaker are strong enough to withstand
up to 350 dB at any given frequency of sound without any injury,
distortion, or clipping.
4. As already said, cannot overheat becuase any heat is converted back
to electricity to energize the speaker.
5. Its non-acoustic electric parts can suffer non-thermal,
non-mechanical electrical injuries, though.
6. Its diaphragm is 40 feet wide, 40 feet long, 40 feet high, 40 feet
deep

What will happen if the electrical equivalent of a 10^500 gigaBel,
10^500 gigahertz, pure sine-wave is forced through the electric parts
of this speaker's diaphragm


Is this homework?


--
After being targeted with gigabytes of trash by the "SWEN" worm, I have
concluded we must conceal our e-mail address. Our true address is the
mirror image of what you see before the "@" symbol. It's a shame such
steps are necessary. ...Charlie
  #3   Report Post  
CJT
 
Posts: n/a
Default Theoretical Acoustic Experiment



Radium wrote:

A *theoretical* speaker:

1. Uses electricity for power
2. Converts any generated heat back to electricity at the quantum
level. Due to this, no parts of the speaker can overheat.
3. The mechanical parts of the speaker are strong enough to withstand
up to 350 dB at any given frequency of sound without any injury,
distortion, or clipping.
4. As already said, cannot overheat becuase any heat is converted back
to electricity to energize the speaker.
5. Its non-acoustic electric parts can suffer non-thermal,
non-mechanical electrical injuries, though.
6. Its diaphragm is 40 feet wide, 40 feet long, 40 feet high, 40 feet
deep

What will happen if the electrical equivalent of a 10^500 gigaBel,
10^500 gigahertz, pure sine-wave is forced through the electric parts
of this speaker's diaphragm


Is this homework?


--
After being targeted with gigabytes of trash by the "SWEN" worm, I have
concluded we must conceal our e-mail address. Our true address is the
mirror image of what you see before the "@" symbol. It's a shame such
steps are necessary. ...Charlie
  #8   Report Post  
Robert Morein
 
Posts: n/a
Default Theoretical Acoustic Experiment


"CJT" wrote in message
...


Radium wrote:

A *theoretical* speaker:

1. Uses electricity for power
2. Converts any generated heat back to electricity at the quantum
level. Due to this, no parts of the speaker can overheat.


Violates third law of thermodynamics.

3. The mechanical parts of the speaker are strong enough to withstand
up to 350 dB at any given frequency of sound without any injury,
distortion, or clipping.


The maximum SPL possible at 14 psi is about 185 dB.

4. As already said, cannot overheat becuase any heat is converted back
to electricity to energize the speaker.


Violates the second law of thermodynamics.

5. Its non-acoustic electric parts can suffer non-thermal,
non-mechanical electrical injuries, though.


What kind of non-thermal, non-mechanical electrical injuries? Headache?

6. Its diaphragm is 40 feet wide, 40 feet long, 40 feet high, 40 feet
deep

What will happen if the electrical equivalent of a 10^500 gigaBel,
10^500 gigahertz, pure sine-wave is forced through the electric parts
of this speaker's diaphragm


Nuclear fusion of heavy elements.


  #9   Report Post  
Robert Morein
 
Posts: n/a
Default Theoretical Acoustic Experiment


"CJT" wrote in message
...


Radium wrote:

A *theoretical* speaker:

1. Uses electricity for power
2. Converts any generated heat back to electricity at the quantum
level. Due to this, no parts of the speaker can overheat.


Violates third law of thermodynamics.

3. The mechanical parts of the speaker are strong enough to withstand
up to 350 dB at any given frequency of sound without any injury,
distortion, or clipping.


The maximum SPL possible at 14 psi is about 185 dB.

4. As already said, cannot overheat becuase any heat is converted back
to electricity to energize the speaker.


Violates the second law of thermodynamics.

5. Its non-acoustic electric parts can suffer non-thermal,
non-mechanical electrical injuries, though.


What kind of non-thermal, non-mechanical electrical injuries? Headache?

6. Its diaphragm is 40 feet wide, 40 feet long, 40 feet high, 40 feet
deep

What will happen if the electrical equivalent of a 10^500 gigaBel,
10^500 gigahertz, pure sine-wave is forced through the electric parts
of this speaker's diaphragm


Nuclear fusion of heavy elements.


  #10   Report Post  
Dick Pierce
 
Posts: n/a
Default Theoretical Acoustic Experiment

(Radium) wrote in message . com...
A *theoretical* speaker:

1. Uses electricity for power


Practical speakers do tha as well.

2. Converts any generated heat back to electricity at the quantum
level. Due to this, no parts of the speaker can overheat.


Do you mean the speaker has 100% efficiency? Well, one can explore
that theoretically, but forget the "converts heat back to electricity
at the quantum level."

3. The mechanical parts of the speaker are strong enough to withstand
up to 350 dB at any given frequency of sound without any injury,
distortion, or clipping.


350 dB relative to WHAT? Do you mean 350 dB SPL?

4. As already said, cannot overheat becuase any heat is converted back
to electricity to energize the speaker.


Geez, forget this nonsense, just say the speaker has 100% efficiency
and be done with it.

5. Its non-acoustic electric parts can suffer non-thermal,
non-mechanical electrical injuries, though.


Huh?

6. Its diaphragm is 40 feet wide, 40 feet long, 40 feet high, 40 feet
deep

What will happen if the electrical equivalent of a 10^500 gigaBel,


What do you mean by this? Do you understand what a Bel is?

10^500 gigahertz, pure sine-wave is forced through the electric parts
of this speaker's diaphragm


The speaker will effectively radiate nothing into the far field for
a variety of reasons.

First, lets presume that whatever is moving the diaphragm could
move at such a preposterous frequency (it can't, we'll see below
why). The diaphragm is SO large compared to the "wavelength" that
effectively every part of the diaphragm is going to be out of
phase with every other part.

Second, acoustical waves simply cannot happen at this frequency.

Third, at the "freqencies" you're talking about, there's nothing
"electrical" that can happen. Visible light has a frequency in the
realm of a million gigahertz, 10^500 GHz is FAR above the realm
of gamma radiation. At these frerquencies and energies, you're
probably at and far above grand unification energies.

Fourth, acoustical phenonenon is a set of behaviors occuring at
the macro/bulk layer, i.e., in our case assumes the existance
of a gas. The frequencies and energies that this implies has left
the bulk behavior of gaseous matter in the dust and you are in
the realm of the pure quanta down below the level of quarks and
gluons.

In otherwords, your questions are at their root physically absurd.
This is not intended as an insult, rather, "absurd" is an objective
consequence the conditions you propose.

Let's ask your question in a slightly different form: what's
the point of your question? What are you trying to learn?


  #11   Report Post  
Dick Pierce
 
Posts: n/a
Default Theoretical Acoustic Experiment

(Radium) wrote in message . com...
A *theoretical* speaker:

1. Uses electricity for power


Practical speakers do tha as well.

2. Converts any generated heat back to electricity at the quantum
level. Due to this, no parts of the speaker can overheat.


Do you mean the speaker has 100% efficiency? Well, one can explore
that theoretically, but forget the "converts heat back to electricity
at the quantum level."

3. The mechanical parts of the speaker are strong enough to withstand
up to 350 dB at any given frequency of sound without any injury,
distortion, or clipping.


350 dB relative to WHAT? Do you mean 350 dB SPL?

4. As already said, cannot overheat becuase any heat is converted back
to electricity to energize the speaker.


Geez, forget this nonsense, just say the speaker has 100% efficiency
and be done with it.

5. Its non-acoustic electric parts can suffer non-thermal,
non-mechanical electrical injuries, though.


Huh?

6. Its diaphragm is 40 feet wide, 40 feet long, 40 feet high, 40 feet
deep

What will happen if the electrical equivalent of a 10^500 gigaBel,


What do you mean by this? Do you understand what a Bel is?

10^500 gigahertz, pure sine-wave is forced through the electric parts
of this speaker's diaphragm


The speaker will effectively radiate nothing into the far field for
a variety of reasons.

First, lets presume that whatever is moving the diaphragm could
move at such a preposterous frequency (it can't, we'll see below
why). The diaphragm is SO large compared to the "wavelength" that
effectively every part of the diaphragm is going to be out of
phase with every other part.

Second, acoustical waves simply cannot happen at this frequency.

Third, at the "freqencies" you're talking about, there's nothing
"electrical" that can happen. Visible light has a frequency in the
realm of a million gigahertz, 10^500 GHz is FAR above the realm
of gamma radiation. At these frerquencies and energies, you're
probably at and far above grand unification energies.

Fourth, acoustical phenonenon is a set of behaviors occuring at
the macro/bulk layer, i.e., in our case assumes the existance
of a gas. The frequencies and energies that this implies has left
the bulk behavior of gaseous matter in the dust and you are in
the realm of the pure quanta down below the level of quarks and
gluons.

In otherwords, your questions are at their root physically absurd.
This is not intended as an insult, rather, "absurd" is an objective
consequence the conditions you propose.

Let's ask your question in a slightly different form: what's
the point of your question? What are you trying to learn?
  #12   Report Post  
Dave H.
 
Posts: n/a
Default Theoretical Acoustic Experiment


"Radium" wrote

A *theoretical* speaker:

-------------8 snip impossible nonsense )--------------------------
What will happen if the electrical equivalent of a 10^500 gigaBel,
10^500 gigahertz, pure sine-wave is forced through the electric parts
of this speaker's diaphragm


Radium appears (on searching back through the group for only a couple of
months) to keep posting silly questions - perhaps he heard someone
trip-trapping across his bridge? ;o) Please don't feed him!

Dave H.
(The engineer formerly known as Homeless)


  #13   Report Post  
Dave H.
 
Posts: n/a
Default Theoretical Acoustic Experiment


"Radium" wrote

A *theoretical* speaker:

-------------8 snip impossible nonsense )--------------------------
What will happen if the electrical equivalent of a 10^500 gigaBel,
10^500 gigahertz, pure sine-wave is forced through the electric parts
of this speaker's diaphragm


Radium appears (on searching back through the group for only a couple of
months) to keep posting silly questions - perhaps he heard someone
trip-trapping across his bridge? ;o) Please don't feed him!

Dave H.
(The engineer formerly known as Homeless)


  #14   Report Post  
Radium
 
Posts: n/a
Default Theoretical Acoustic Experiment

If electricity did not generate heat, what would happen in a grossly
overloaded circuit?


(Dick Pierce) wrote in message . com...
What are you trying to learn?
  #15   Report Post  
Radium
 
Posts: n/a
Default Theoretical Acoustic Experiment

If electricity did not generate heat, what would happen in a grossly
overloaded circuit?


(Dick Pierce) wrote in message . com...
What are you trying to learn?


  #16   Report Post  
Robert Morein
 
Posts: n/a
Default Theoretical Acoustic Experiment

At that frequency, coherent mechanical motion does not occur. As Mr. Pierce
points out, the time and distance scales are not addressed by classical
physics.

It would appear that you're thinking is bound by classical physics. It might
be a good idea to read one of the popular books on modern physics. The
question you ask has no answer, because the universe in which it could occur
does not exist -- not here, anyway.


"Radium" wrote in message
om...
If electricity did not generate heat, what would happen in a grossly
overloaded circuit?


(Dick Pierce) wrote in message

. com...
What are you trying to learn?



  #17   Report Post  
Robert Morein
 
Posts: n/a
Default Theoretical Acoustic Experiment

At that frequency, coherent mechanical motion does not occur. As Mr. Pierce
points out, the time and distance scales are not addressed by classical
physics.

It would appear that you're thinking is bound by classical physics. It might
be a good idea to read one of the popular books on modern physics. The
question you ask has no answer, because the universe in which it could occur
does not exist -- not here, anyway.


"Radium" wrote in message
om...
If electricity did not generate heat, what would happen in a grossly
overloaded circuit?


(Dick Pierce) wrote in message

. com...
What are you trying to learn?



  #20   Report Post  
Richard Kuschel
 
Posts: n/a
Default Theoretical Acoustic Experiment


A *theoretical* speaker:

1. Uses electricity for power
2. Converts any generated heat back to electricity at the quantum
level. Due to this, no parts of the speaker can overheat.
3. The mechanical parts of the speaker are strong enough to withstand
up to 350 dB at any given frequency of sound without any injury,
distortion, or clipping.


350 dB cannot be produced by anything including 10 sticks of dynamite.

The lmit of the atmosphere is about 194dBSPL.

If you want to see a speaker that is practically running off the wall current,
the Carver Sunfire comes pretty close.


Richard H. Kuschel
"I canna change the law of physics."-----Scotty


  #21   Report Post  
Richard Kuschel
 
Posts: n/a
Default Theoretical Acoustic Experiment


A *theoretical* speaker:

1. Uses electricity for power
2. Converts any generated heat back to electricity at the quantum
level. Due to this, no parts of the speaker can overheat.
3. The mechanical parts of the speaker are strong enough to withstand
up to 350 dB at any given frequency of sound without any injury,
distortion, or clipping.


350 dB cannot be produced by anything including 10 sticks of dynamite.

The lmit of the atmosphere is about 194dBSPL.

If you want to see a speaker that is practically running off the wall current,
the Carver Sunfire comes pretty close.


Richard H. Kuschel
"I canna change the law of physics."-----Scotty
  #22   Report Post  
Dick Pierce
 
Posts: n/a
Default Theoretical Acoustic Experiment

(Richard Kuschel) wrote in message ...

A *theoretical* speaker:

1. Uses electricity for power
2. Converts any generated heat back to electricity at the quantum
level. Due to this, no parts of the speaker can overheat.
3. The mechanical parts of the speaker are strong enough to withstand
up to 350 dB at any given frequency of sound without any injury,
distortion, or clipping.


350 dB cannot be produced by anything including 10 sticks of dynamite.

The lmit of the atmosphere is about 194dBSPL.


No, it's not. This is a common myth. It's based on the false assumption
that one is limited to changes of +-1 atmosphere. It's possible to generate
overpressures well in excess of one atmosphere.

As a separate issue, and one that speaks directly to the common myth,
a "vacuum" does not set the limit. Consider, for example, producing
sound by moving a piston back and forth. If you double the excursion
of the pistion, you double the high pressure, and halve the low pressue.
Double it again and you now quadruple the high pressure, and the low
pressure is 1/4 what it was compared to the initial excursion.

Now, how much excursion is required to produce a vacuum at the low
pressure side? Well, an infinite excursion, obviously an absurd case.

The myth comes from the fact that people assume intuitively, but quite
incorrectly, that sound pressure results from some linear action when,
in fact, it's a reciprocal action. Remember PV = nRT (gas equation),
thus P = nRT/V, where P is pressure and V is volume.

Atmospheric sound pressures well in excess of 194 dB have been
produced, with no limit in sight, save putting enough energy into
the gas to start chemical disassociation and other non-linearites
that change the value of R in the perfect gas equation.
  #23   Report Post  
Dick Pierce
 
Posts: n/a
Default Theoretical Acoustic Experiment

(Richard Kuschel) wrote in message ...

A *theoretical* speaker:

1. Uses electricity for power
2. Converts any generated heat back to electricity at the quantum
level. Due to this, no parts of the speaker can overheat.
3. The mechanical parts of the speaker are strong enough to withstand
up to 350 dB at any given frequency of sound without any injury,
distortion, or clipping.


350 dB cannot be produced by anything including 10 sticks of dynamite.

The lmit of the atmosphere is about 194dBSPL.


No, it's not. This is a common myth. It's based on the false assumption
that one is limited to changes of +-1 atmosphere. It's possible to generate
overpressures well in excess of one atmosphere.

As a separate issue, and one that speaks directly to the common myth,
a "vacuum" does not set the limit. Consider, for example, producing
sound by moving a piston back and forth. If you double the excursion
of the pistion, you double the high pressure, and halve the low pressue.
Double it again and you now quadruple the high pressure, and the low
pressure is 1/4 what it was compared to the initial excursion.

Now, how much excursion is required to produce a vacuum at the low
pressure side? Well, an infinite excursion, obviously an absurd case.

The myth comes from the fact that people assume intuitively, but quite
incorrectly, that sound pressure results from some linear action when,
in fact, it's a reciprocal action. Remember PV = nRT (gas equation),
thus P = nRT/V, where P is pressure and V is volume.

Atmospheric sound pressures well in excess of 194 dB have been
produced, with no limit in sight, save putting enough energy into
the gas to start chemical disassociation and other non-linearites
that change the value of R in the perfect gas equation.
  #24   Report Post  
Radium
 
Posts: n/a
Default Theoretical Acoustic Experiment

Okay. Forget about my original post. Consider the following.

What will happen (theoretically) if a 140 dB, 40 KHz sine wave tone is
forced out of:
1. A PC speaker
2. A Bose speaker
3. The speaker of a 56kbps Robotics Fax modem
4. An electrostatic speaker
5. The speaker of a Casio SA-11 100 ToneBank Keyboard

NOTE: I am just in it for the science. I have no current application
in mind.
  #25   Report Post  
Radium
 
Posts: n/a
Default Theoretical Acoustic Experiment

Okay. Forget about my original post. Consider the following.

What will happen (theoretically) if a 140 dB, 40 KHz sine wave tone is
forced out of:
1. A PC speaker
2. A Bose speaker
3. The speaker of a 56kbps Robotics Fax modem
4. An electrostatic speaker
5. The speaker of a Casio SA-11 100 ToneBank Keyboard

NOTE: I am just in it for the science. I have no current application
in mind.


  #28   Report Post  
CJT
 
Posts: n/a
Default Theoretical Acoustic Experiment

Radium wrote:

Okay. Forget about my original post. Consider the following.

What will happen (theoretically) if a 140 dB, 40 KHz sine wave tone is
forced out of:
1. A PC speaker
2. A Bose speaker
3. The speaker of a 56kbps Robotics Fax modem
4. An electrostatic speaker
5. The speaker of a Casio SA-11 100 ToneBank Keyboard

NOTE: I am just in it for the science. I have no current application
in mind.


Smoke, mostly. Maybe not even that.

--
After being targeted with gigabytes of trash by the "SWEN" worm, I have
concluded we must conceal our e-mail address. Our true address is the
mirror image of what you see before the "@" symbol. It's a shame such
steps are necessary. ...Charlie
  #29   Report Post  
CJT
 
Posts: n/a
Default Theoretical Acoustic Experiment

Radium wrote:

Okay. Forget about my original post. Consider the following.

What will happen (theoretically) if a 140 dB, 40 KHz sine wave tone is
forced out of:
1. A PC speaker
2. A Bose speaker
3. The speaker of a 56kbps Robotics Fax modem
4. An electrostatic speaker
5. The speaker of a Casio SA-11 100 ToneBank Keyboard

NOTE: I am just in it for the science. I have no current application
in mind.


Smoke, mostly. Maybe not even that.

--
After being targeted with gigabytes of trash by the "SWEN" worm, I have
concluded we must conceal our e-mail address. Our true address is the
mirror image of what you see before the "@" symbol. It's a shame such
steps are necessary. ...Charlie
  #30   Report Post  
Radium
 
Posts: n/a
Default Theoretical Acoustic Experiment

Can electrostatic speakers "burn out"?

They generate sound by hitting the surrounding air with electrons and
thus causing those air molucules to vibrate.

Laurence Payne wrote in message . ..
The rest would of course have burnt out
long ago.



  #31   Report Post  
Radium
 
Posts: n/a
Default Theoretical Acoustic Experiment

Can electrostatic speakers "burn out"?

They generate sound by hitting the surrounding air with electrons and
thus causing those air molucules to vibrate.

Laurence Payne wrote in message . ..
The rest would of course have burnt out
long ago.

  #40   Report Post  
Peter Larsen
 
Posts: n/a
Default Theoretical Acoustic Experiment

Radium wrote:

Okay. Forget about my original post. Consider the following.


What will happen (theoretically) if a 140 dB, 40 KHz sine wave tone is
forced out of:


1. A PC speaker


It isn't.

2. A Bose speaker


You send the speaker in for warranty repair.

3. The speaker of a 56kbps Robotics Fax modem


You already asked this question. The reply still is "it isn't".

4. An electrostatic speaker


You send the amplifier in for warranty repair.

5. The speaker of a Casio SA-11 100 ToneBank Keyboard


You already asked this question. The reply still is "it isn't".

NOTE: I am just in it for the science. I have no current application
in mind.


Science ... ah, you train for a degree in trolling .... O;-)


Kind regards

Peter Larsen


--
************************************************** ***********
* My site is at: http://www.muyiovatki.dk *
************************************************** ***********

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