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Determine depth of waveguide/horn
Determine depth of waveguide/horn
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Old 29th August 2019, 12:56 PM   #1
AdamFelix is offline AdamFelix  Denmark
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Default Determine depth of waveguide/horn

Is there a formula for determining the ideal depth of a waveguide or horn on the basis of mouth and throat dimensions?
I am considering building a horn/waveguide optimized for constant directivity not loading.
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Old 29th August 2019, 01:49 PM   #2
Drofdissonance is offline Drofdissonance
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I think most would suggest a O.S. waveguide. then the waveguide dimensions and depth are set by the formula.
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Old 29th August 2019, 02:35 PM   #3
AdamFelix is offline AdamFelix  Denmark
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Quote:
Originally Posted by Drofdissonance View Post
I think most would suggest a O.S. waveguide. then the waveguide dimensions and depth are set by the formula.
Thanks!
What’s the formula?
A spreadsheet where I can type mouth and throat dimensions and then get the depth would be great.
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Old 29th August 2019, 03:11 PM   #4
AllenB is offline AllenB  Australia
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Determine depth of waveguide/horn
.
Attached Files
File Type: zip OS_wave_guide.zip (80.3 KB, 45 views)
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Old 29th August 2019, 08:30 PM   #5
AdamFelix is offline AdamFelix  Denmark
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Quote:
Originally Posted by AllenB View Post
.
Hmmm..
I'm not sure how to use that sheet.
I have uploaded it to google sheets now. What does the different things mean in "real words"?
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Old 30th August 2019, 12:00 AM   #6
norman bates is offline norman bates  United States
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tweet horn or bass horn ?
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Old 30th August 2019, 12:39 AM   #7
Patrick Bateman is offline Patrick Bateman  United States
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Quote:
Originally Posted by AdamFelix View Post
Is there a formula for determining the ideal depth of a waveguide or horn on the basis of mouth and throat dimensions?
I am considering building a horn/waveguide optimized for constant directivity not loading.
The beamwidth of a waveguide is the angle of the walls.

That's it.

When I first saw that, I thought it had to be more complex than that, but it isn't.

For instance, a conical waveguide measuring 90 x 90 degrees will have a beamwidth of 90 x 90 degrees.
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Old 30th August 2019, 03:51 AM   #8
AllenB is offline AllenB  Australia
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Determine depth of waveguide/horn
Throat radius, start angle, asymptote (end angle).
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Old 30th August 2019, 05:03 AM   #9
AllenB is offline AllenB  Australia
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Determine depth of waveguide/horn
Eg. 0.5, 0, 45
for a 1" driver,
0 for a dome (otherwise the compression driver exit angle)
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Old 30th August 2019, 07:31 AM   #10
Gaga is online now Gaga  Europe
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May be easiest would be to just use Hornresponse for calculation of your WG. Hornresp can do OS-WGs and will export dimensions in xls (or csv) format (do not remember exactly).

If you want to optimize for constant directivity, you either have to start over with simulations, or build and measure.... Both may be fun.
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