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diyAudio Member

Join Date: Oct 2010
And now, you are correct that the Calculations?
Attached Images
 t-t.png (36.9 KB, 238 views)

diyAudio Member

Join Date: Mar 2005
Location: Jacobsmountain
Quote:
 Originally Posted by nelnar And now, you are correct that the Calculations?
Why shouldn't I.

b
Attached Images
 t-t-corr.jpg (71.2 KB, 239 views)

 13th June 2012, 11:20 PM #13 diyAudio Member   Join Date: Oct 2010 BJORNO! Many thanks. But even so grateful! I apologize for your time employee in my project. However, I think this is all very gratifying. Tell me one thing: To calculate the size of the line, the correct calculation would be as follows: row length = speed of sound / FS / 4 In our case would be> row length = 344 / 23.80 / 4 = 3.613 cm In the calculation made by softerware line length was 2.87 cm in this is just a curiosity. Another thing: For graphical analysis box "T-TQWT", the waves were better than the OD-TL? Last edited by nelnar; 13th June 2012 at 11:24 PM.
diyAudio Member

Join Date: Oct 2010
just one more question:

which the correct design "1" or drawing "2"?

In the drawing "1", this wide-open, ie 31cm + 5.71 cm.

In the drawing "2", only one door for access to the driver, are, is closed, only opened in S4 (5.71 cm), the air coming out only by S4.
Attached Images
 t-tqwt.png (62.5 KB, 221 views)

diyAudio Member

Join Date: Oct 2010
sorry:
correcting FS 23.80, 23.40 FS is correct

Quote:
 Originally Posted by nelnar BJORNO! Many thanks. But even so grateful! I apologize for your time employee in my project. However, I think this is all very gratifying. Tell me one thing: To calculate the size of the line, the correct calculation would be as follows: row length = speed of sound / FS / 4 In our case would be> row length = 344 / 23.40 / 4 = 3.675 cm In the calculation made by softerware line length was 2.87 cm in this is just a curiosity. Another thing: For graphical analysis box "T-TQWT", the waves were better than the OD-TL?

diyAudio Member

Join Date: Mar 2005
Location: Jacobsmountain
Quote:
 Originally Posted by nelnar just one more question: which the correct design "1" or drawing "2"? In the drawing "1", this wide-open, ie 31cm + 5.71 cm. In the drawing "2", only one door for access to the driver, are, is closed, only opened in S4 (5.71 cm), the air coming out only by S4.
Both are but when you draw imaginary sound rays as in # "1": This gives a false
impression that the sound travels through the Lid, it doesn't !
You have to detach= here remove the Lid in order to convert the T-TQWT into an OD-TL.

Corrected picture here:

b
Attached Images
 t-tqwt-corr.PNG (66.0 KB, 186 views)

diyAudio Member

Join Date: Mar 2005
Location: Jacobsmountain
Quote:
 Originally Posted by nelnar sorry: correcting FS 23.80, 23.40 FS is correct
You'll receive answers to post # 13 no earlier than tomorrow, my time.

b

diyAudio Member

Join Date: Oct 2010
Quote:
 Originally Posted by bjorno You'll receive answers to post # 13 no earlier than tomorrow, my time. b
Bjorno, the question of T-TQWT, I get this straight.
Let's talk only of the T-TQWT.
This cover you're talking about, is merely to maintain the driver. However, in normal circumstance, is closed? would that be!
As in the drawing?
Attached Images
 t-tqwt.png (68.4 KB, 180 views)

diyAudio Member

Join Date: Mar 2005
Location: Jacobsmountain
Quote:
 Originally Posted by nelnar ..Let's talk only of the T-TQWT. This cover you're talking about, is merely to maintain the driver. However, in normal circumstance, is closed? would that be! As in the drawing?
Yes! And if you remove the cover(Lid) you have an OD-TL as simple as that.
In OB-TL mode the In-Band FR sloops gently towards lower frequencies = sometimes handy to invoke if room boundary gain considered to high ( corner placements).
The summing of the driver and terminus will be in the far-field for a OD-TL( picking up boundary from the vicinity too) but a T-TQWT can be considered as a Omni-point-pressure-source with comparable low sensitivity for external boundaries interactions.

b

 15th June 2012, 11:48 PM #20 diyAudio Member   Join Date: Oct 2010 That lesson you gave me into a friend. I would like to understand the transmission line just like you! Tell me how you have any digital book? As for the softer you use, would be fully trusted? That same month I will make this T-suboover TQWT, and when you are ready, post here, with special thanks to you! Thank you and I apologize for my impatience! a hug

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