Now for some technicalities -
Below is the measured FR curve with the plastic Dayton waveguide. This is 1 3/8" in diameter (34.925mm). Converting that to frequency is 9850Hz. You can see that from the curves, the HF roll-off happens exactly around that frequency as the waveguide is not able to guide the frequency above that as there is no support from the flares. It will be interesting to see if the DIY horn is also able to demonstrate such a good FR curve which the Dayton waveguide is offering.
Below is the measured FR curve with the plastic Dayton waveguide. This is 1 3/8" in diameter (34.925mm). Converting that to frequency is 9850Hz. You can see that from the curves, the HF roll-off happens exactly around that frequency as the waveguide is not able to guide the frequency above that as there is no support from the flares. It will be interesting to see if the DIY horn is also able to demonstrate such a good FR curve which the Dayton waveguide is offering.
