Re: Speaker Magnet Fields and ICD's
|
Joined: Sep 2004
Posts: 11,458
shareholder in the making
|
shareholder in the making
Joined: Sep 2004
Posts: 11,458 |
If it's the same Inverse Square Law as applies to lighting (could there be two?) the effect would be one quarter the magnetism at twice the distance, or, put another way, if you double the distance you get 1/4 the effect.
This is because the light (or magnetism, or...or...) is not only spread horizontally, but vertically as well.
Since everybody here likes photos and I had 20 mins. between appointments, I drew a diagram!
::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
|
|
|
Re: Speaker Magnet Fields and ICD's
|
Joined: Apr 2003
Posts: 16,441
shareholder in the making
|
shareholder in the making
Joined: Apr 2003
Posts: 16,441 |
Mark, your diagrams kick ass!
...but the perfectionist in me just can't help commenting that your squares should have some spherical curvature, since the linear distance from the bulb to each point in the squares at 2D should be equal....
|
|
|
Re: Speaker Magnet Fields and ICD's
|
Joined: Sep 2004
Posts: 11,458
shareholder in the making
|
shareholder in the making
Joined: Sep 2004
Posts: 11,458 |
I SAID I only had 20 minutes!
Besides, I'm a Photoshop guy... I ain't got no Illustrator or any of 'dem fanzee-schmantzee drawin' programs!
Man... see if I EVER post any photos on these boards!
::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
|
|
|
Re: Speaker Magnet Fields and ICD's
|
Joined: Jan 2002
Posts: 3,270
connoisseur
|
connoisseur
Joined: Jan 2002
Posts: 3,270 |
Ajax, Mark S.,
Thanks for the super diagram. And yes, I did those same experiments with magnets as a kid and came to the same intuitive conclusion as you did.
Regards,
Alan Lofft, Axiom Resident Expert (Retired)
|
|
|
Re: Speaker Magnet Fields and ICD's
|
Joined: Sep 2004
Posts: 11,458
shareholder in the making
|
shareholder in the making
Joined: Sep 2004
Posts: 11,458 |
See Peter?
Alan liked my diagram....so there!
::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
|
|
|
Re: Speaker Magnet Fields and ICD's
|
Joined: Jun 2004
Posts: 1,805
connoisseur
|
connoisseur
Joined: Jun 2004
Posts: 1,805 |
Mark
I liked your diagram also. It reminded me of a photography text book I had 20 years ago.
LIFE IS SHORT. DON'T BE A DICK.
|
|
|
Re: Speaker Magnet Fields and ICD's
|
Joined: Sep 2004
Posts: 11,458
shareholder in the making
|
shareholder in the making
Joined: Sep 2004
Posts: 11,458 |
I used to teach photography classes and used to have all this stuff on slides. I actually showed slides...HA! Remember THOSE days?
::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
|
|
|
Re: Speaker Magnet Fields and ICD's
|
Joined: Jun 2004
Posts: 1,805
connoisseur
|
connoisseur
Joined: Jun 2004
Posts: 1,805 |
Yea!!!
I have a 2 closets full of them. Wish I had a GOOD slide scanner.
IF I went and spent 1500.00 on one, it would take months to scan all my slides, then It wouldnt ever get used again, and I would have a $1500.00 paper weight.
LIFE IS SHORT. DON'T BE A DICK.
|
|
|
Re: Speaker Magnet Fields and ICD's
|
Joined: Jan 2002
Posts: 3,270
connoisseur
|
connoisseur
Joined: Jan 2002
Posts: 3,270 |
Exactly. Boxes full of them. And I still have some large-format 2 1/4 x 2 1/4 inch transparencies. I have a viewer for those but the projector is long gone. When those big suckers were projected it was like HD compared to 35mm slides. I took them with a Yashica, a very good knock-off of the German-made (and expensive) Rolleiflex.
Regards,
Alan Lofft, Axiom Resident Expert (Retired)
|
|
|
Re: Speaker Magnet Fields and ICD's
|
Joined: Sep 2004
Posts: 11,458
shareholder in the making
|
shareholder in the making
Joined: Sep 2004
Posts: 11,458 |
My first medium format camera was a Yashicamat 124G TLR... I couldn't afford a medium format SLR or even a Mamiya at the time (I was 15)....not to mention a Rollei. It was a great camera...I still have it down in my studio in a display of old equipment.
I never had a way of projecting 2 1/4" transparencies though.... those and my 4x5s just got to look nice on a lightbox!
::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
|
|
|
Forums16
Topics24,949
Posts442,512
Members15,619
|
Most Online2,082 Jan 22nd, 2020
|
|
2 members (RickF, BBIBH),
684
guests, and
2
robots. |
Key:
Admin,
Global Mod,
Mod
|
|
|
|