Wow! That looks really impressive!OK, here's the try - the outer channels "pinched" so that the area is only increasing. Seems to change something
(1.4" driver)
What it probably still needs is an adjustment of area expansion to better match the plug and the waveguide entrance.
This is a good stuff, guys.
Could we get a comparison to a OS-SE of the same diameter/coverage angle to see how large of an improvement there is to polars and impedance?
Sincerely
Anton
I am not trained in natural sciences. Maybe the fact that the phase plug divides the pressure field into four chambers with four distinct exits is already introducing enough discontinuity at its 'mouth'. Any abrupt change in pressure will be relayed backward and inscribe itself into impedance as wiggles. Like when you simulate a baffled device that has no termination without an infinite baffle, the edge diffraction will rip the impedance. Do the tulip fins introduce discontinuity even though they create a sperical wave front?
This looks incredibly nice!It might just be attachable
e: aragorus, can you tell me how/where to learn basic fusion skills? I fail at most basic operations.
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I'm relatively new to it. Started learning it during the first lockdown.
Take your time and sketch everything typing numbers instead of making points with the mouse
Good 2d sketches lead to good 3d models.
Something that saved me a lot of time is projecting points from one sketch to another to make sure things align.
With just 3 operations, you can make almost anything.
Extrude, Revolve, Loft
Take your time and sketch everything typing numbers instead of making points with the mouse
Good 2d sketches lead to good 3d models.
Something that saved me a lot of time is projecting points from one sketch to another to make sure things align.
With just 3 operations, you can make almost anything.
Extrude, Revolve, Loft
I'm not aragorus, but this might help:
Fusion 360 Help
Another way is to follow a tutorial like this, that shows you a couple of different ways to model: Introduction to Fusion 360: Design a Lamp in an Hour : 4 Steps - Instructables
YouTube is loaded with Fusion tutorials. Not all of them are created equally though.
Fusion 360 Help
Another way is to follow a tutorial like this, that shows you a couple of different ways to model: Introduction to Fusion 360: Design a Lamp in an Hour : 4 Steps - Instructables
YouTube is loaded with Fusion tutorials. Not all of them are created equally though.
Extended HF. Also for 1", but more so for 1.4" and 2" drivers.
Thank you for poiting out some quality tutorials and sharing some tricks.
Mainly the possibility of using large throat drivers without high-frequency beaming.
The proof of concept is now in aragorus' hands. If the Axi2050 won't make it, I don't know what else can
But yes, it may come down to finding a suitable driver. We would really have to measure the exit wavefront, I'm afraid (no progress on that on my side). Or just try it and see, like we always do. The simulation says it's definitely possible, IF the wave is uniform across the input aperture.
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That would be probably the easiest to quickly see if it behaves at least remotely close to what we hope. It's not a problem to simulate a spherical cap in an infinite plane, or in free space in the middle of a disc.
I really like the idea the used in the berstis lens paper.
Using a microphone, preamp, some gate logic and an LED to visualize the wave shape.
Driving the speaker with square waves that get compared to the input from the mic and then having a long exposure camera to capture multiple blinks
Using a microphone, preamp, some gate logic and an LED to visualize the wave shape.
Driving the speaker with square waves that get compared to the input from the mic and then having a long exposure camera to capture multiple blinks
I still have the this 2" driver so I thought I will try something as well. The driver has quite long exit section, but who knows, maybe in the end it may be better to give the wave some time to "average out". I also thought about inserting a printed tubular ring into the exit section, making the initial profile exponential, instead of conical, i.e. making one smooth area expansion including the plug.
BTW, this would be ø375 x 175 mm including the plug.
BTW, this would be ø375 x 175 mm including the plug.
Attachments
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