Nousaine wrote:

When this occurs it is more a result of the interactions and room resonances
than what I was trying to describe....

What you were trying to describe is often called the Allison Effect where the
output from a boundary reflection and a source (or two or more sources) causes
a response interference error. This is not a standing wave and it occurs in
cars and rooms at lower mid-range frequencies.

I know, I already said you could call it Allison effect!

But it is STILL a standing wave....

If the wave looks like its standing
IT IS STANDING


and in reality there are no waves that actually stand, they all move.
but the constructive and destructive interferance causes them to
*appear* to be standing still....

Eddie Runner

Nousaine wrote:

. And you still cannot
display a standing wave in an open-ended tube.

I just did!

Didnt you see the picture I put up for you at this URL?
http://installer.com/tech/standingwave.html

it says right there on the picture
* STANDING SOUND WAVE IN A PIPE*

and it also has the ends of the pipe labeled
* OPEN END and CLOSED END*

What is it about this picture you dont believe???


Now Tom,
I have shown you reference materials that say your wrong.
(several now)

You have offered up NOTHING except your lame words....

WHERE IS THE BEEF???????????????




Eddie Runner
http://www.installer.com/tech/

Nousaine wrote:

. And you still cannot
display a standing wave in an open-ended tube.

I just did!

Didnt you see the picture I put up for you at this URL?
http://installer.com/tech/standingwave.html

it says right there on the picture
* STANDING SOUND WAVE IN A PIPE*

and it also has the ends of the pipe labeled
* OPEN END and CLOSED END*

What is it about this picture you dont believe???

There's no sound source. The 'wave' just magically appears out of nowhere. If
the source iis located at the 'open-end' then that end isn't 'open.' If the
source is at the closed-end then it has nothing from which to reflect at the
open-end.



Now Tom,
I have shown you reference materials that say your wrong.
(several now)

You have offered up NOTHING except your lame words....

WHERE IS THE BEEF???????????????




Eddie Runner
http://www.installer.com/tech/

Let me refer you again to Leo Baranek "Acoustics" Chapter 10 is a good place to
begin.

Nousaine wrote:

http://installer.com/tech/standingwave.html
it says right there on the picture
* STANDING SOUND WAVE IN A PIPE*
and it also has the ends of the pipe labeled
* OPEN END and CLOSED END*

What is it about this picture you dont believe???

There's no sound source.

It shows a sound wave in the picture Tom, that does mean
there MUST BE a sound source.... are you on drugs???

The 'wave' just magically appears out of nowhere.

the SOURCE is notimportant!
What IS important is there is a sound wave moving from left to
right and the reflection moves from right to left creating a
STANDING WAVE.....

If the source iis located at the 'open-end' then that end isn't 'open.'

why not?
the source could be anywhere....
All thats required is that sound enters the tube!

SOUND DOESNT HAVE TO BE BEEMED INTO THE TUBE
IT CAN BE ANY SOUND FROM A MILE AWAY EVEN!!!

WHAT makes you think if a speaker isnt attached to and sealing
the end of the tube that sound wont enter the tube????

If sound happens 50 ft away does that sound not enter the tube
TO YOUR FKIN EARDRUM????

Wake up Tom!!!!!!!!!!!!!!!!

Eddie Runner
http://www.installer.com/tech/

Eddie Runner wrote:



Nousaine wrote:

http://installer.com/tech/standingwave.html
it says right there on the picture
* STANDING SOUND WAVE IN A PIPE*
and it also has the ends of the pipe labeled
* OPEN END and CLOSED END*

What is it about this picture you dont believe???

There's no sound source.

It shows a sound wave in the picture Tom, that does mean
there MUST BE a sound source.... are you on drugs???

The 'wave' just magically appears out of nowhere.

the SOURCE is notimportant!
What IS important is there is a sound wave moving from left to
right and the reflection moves from right to left creating a
STANDING WAVE.....

If the source iis located at the 'open-end' then that end isn't 'open.'

why not?
the source could be anywhere....
All thats required is that sound enters the tube!

SOUND DOESNT HAVE TO BE BEEMED INTO THE TUBE
IT CAN BE ANY SOUND FROM A MILE AWAY EVEN!!!

WHAT makes you think if a speaker isnt attached to and sealing
the end of the tube that sound wont enter the tube????

If sound happens 50 ft away does that sound not enter the tube
TO YOUR FKIN EARDRUM????

Wake up Tom!!!!!!!!!!!!!!!!

Eddie Runner
http://www.installer.com/tech/


Oh christ; this is funny. What source 50 feet away is going to build a standing
wave in your tube at 60 Hz?

And if it did why doesn't it just come back out. You're talking about a 50 mSec
travel time so how does the source get back in time to form a standing wave at
60 Hz or lower?

Never thought about that did you? But even so; your basic advice about woofer
direction seems to be bull****. I've posted some relevant data. You have some?