Discussion:
Audiophools
(too old to reply)
Steve M
2012-12-19 22:07:05 UTC
Permalink
Someone asked me for advice on home audio in an online forum. Not my area of
concern, and something I've never
given much time to. The forum itself is not devoted to audio. Others chimed
in, bragging about their home systems.
One person spoke of their $100/ft speaker cables. They tehn spoke about
cables needing a "break in" period to
sound right. I contradicted the nonsense.
Next, the audiophool wrote the following. I'd like others here to weigh in
with an opinion of it. I call BS on the bit
about high frequencies and "the thinner layer of metal" business.



"a pair of electrical conductors carry an electrical signal from one place
to another. the two conductors
have inductance per unit length, which is calculated from their size and
shape. they have capacitance
per unit length, which is calculated from the dielectric constant of the
insulation.

the electrical resistance of the conductors is significant because it
increases with frequency.
the magnetic fields generated by high-frequency currents drive those
currents to the outer
edge of the conductor that carries them, so the higher the frequency, the
thinner the layer
of metal available to carry the current, and the higher the effective
resistance of the cable."


--
Steve McQ
Gareth Magennis
2012-12-19 23:29:55 UTC
Permalink
Yawn.


Perhaps you should have talked about Gun Laws instead, if you really want to
provoke some kind of over argued argument.
Steve M
2012-12-19 23:42:19 UTC
Permalink
Post by Gareth Magennis
Yawn.
Perhaps you should have talked about Gun Laws instead, if you really want
to provoke some kind of over argued argument.
The pathetic part is that the guy claims to be an electrical engineer.

--
Steve McQ
Gareth Magennis
2012-12-19 23:58:01 UTC
Permalink
Post by Steve M
Post by Gareth Magennis
Yawn.
Perhaps you should have talked about Gun Laws instead, if you really want
to provoke some kind of over argued argument.
The pathetic part is that the guy claims to be an electrical engineer.
--
Steve McQ
Humans hear what they want to hear, and don't hear what they don't want to
hear, it has very little to do with measurable scientific data.

IMHO.


Gareth.
Steve M
2012-12-20 05:23:53 UTC
Permalink
Post by Gareth Magennis
Humans hear what they want to hear, and don't hear what they don't want to
hear, it has very little to do with measurable scientific data.
Very true. I think they "hear" an improvement because they have to.
Otherwise, they'd
suffer the fact of all the money they spent for naught.

--
Steve McQ
Gareth Magennis
2012-12-20 09:05:19 UTC
Permalink
Post by Steve M
Post by Gareth Magennis
Humans hear what they want to hear, and don't hear what they don't want
to hear, it has very little to do with measurable scientific data.
Very true. I think they "hear" an improvement because they have to.
Otherwise, they'd
suffer the fact of all the money they spent for naught.
--
Steve McQ
So, they do hear an improvement, so for them that is money well spent.

Leave them to their hobby, they are doing you no harm, eh.


Gareth.
Phil Allison
2012-12-20 11:06:30 UTC
Permalink
"Gareth Magennis"
Post by Gareth Magennis
So, they do hear an improvement, so for them that is money well spent.
Leave them to their hobby, they are doing you no harm, eh.
** Just like paedophiles and their kiddie porn.

FYI :

the harm done is neither immediate or so obvious ....




... Phil
Gareth Magennis
2012-12-20 12:27:40 UTC
Permalink
Post by Phil Allison
"Gareth Magennis"
Post by Gareth Magennis
So, they do hear an improvement, so for them that is money well spent.
Leave them to their hobby, they are doing you no harm, eh.
** Just like paedophiles and their kiddie porn.
No, not really, as the production of the kiddie porn itself is actually the
abuse and they are the market for that abuse.


I think a far better analogy is "just like placebos and alternative
therapies".


Gareth.
Phil Allison
2012-12-21 02:47:37 UTC
Permalink
"Gareth Magennis"
"Phil Allison"
Post by Phil Allison
Post by Gareth Magennis
So, they do hear an improvement, so for them that is money well spent.
Leave them to their hobby, they are doing you no harm, eh.
** Just like paedophiles and their kiddie porn.
No, not really,
** The analogy is perfectly OK.
I think a far better analogy is "just like placebos and alternative
therapies".
** Which do can enormous harm, but not immediately or so obviously.

You have not got the faintest clue.



.... Phil

Arny Krueger
2012-12-20 14:48:14 UTC
Permalink
Post by Steve M
the electrical resistance of the conductors is significant because it
increases with frequency.
the magnetic fields generated by high-frequency currents drive those
currents to the outer
edge of the conductor that carries them, so the higher the frequency, the
thinner the layer
of metal available to carry the current, and the higher the effective
resistance of the cable."
This is known as skin effect. It is real with high audio frequencies and
very large conductors. It is real with RF and ordinary conductors. It has
insignificant effects with regular audio cables in home systems.

http://www.st-andrews.ac.uk/~www_pa/Scots_Guide/audio/skineffect/page1.html
geoff
2012-12-20 19:52:48 UTC
Permalink
Post by Arny Krueger
Post by Steve M
the electrical resistance of the conductors is significant because it
increases with frequency.
the magnetic fields generated by high-frequency currents drive those
currents to the outer
edge of the conductor that carries them, so the higher the frequency, the
thinner the layer
of metal available to carry the current, and the higher the effective
resistance of the cable."
This is known as skin effect. It is real with high audio frequencies and
very large conductors. It is real with RF and ordinary conductors. It has
insignificant effects with regular audio cables in home systems.
http://www.st-andrews.ac.uk/~www_pa/Scots_Guide/audio/skineffect/page1.html
And a fraction of the effect that moving one's head a few inches has in the
average room.

geoff
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