Python script for generating exponential throat adaptor
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 12th January 2015, 10:44 PM #2 more10   diyAudio Member   Join Date: Feb 2011 Location: Solna Now the script (and the cad files) is improved to use different entry and exit cutoff frequencies. The algorithm is very simple. First a exponential curve is generated for adapter entry cutoff frequency. Points are generated for every 0.1 mm. This gives a start length of the apdapter. Then a cutoff step is calculated by dividing the difference between exit and entry cutoff frequencies by the number of points. A new curve is created using a new cutoff frequency for each step, using the calculated cutoff step. This procedure is continued until there is no improvement or we reach an exit cutoff frequency 0.1 Hz from the exit target frequency.
 13th January 2015, 10:15 PM #3 more10   diyAudio Member   Join Date: Feb 2011 Location: Solna I have added printout of entry and exit angles. Each iteration is printed. For my 200T adapter the console printout is: Code: ```fcM=182.0, xM=10.8, v0=4.66769832783, vM=4.83792915027 step=0.165137614679, len=109 fcM=198.844036697, xM=10.3, v0=4.66769832783, vM=5.28728579834 step=0.173076923077, len=104 fcM=199.653846154, xM=10.3, v0=4.66769832783, vM=5.30929489981 step=0.173076923077, len=104 fcM=199.653846154, xM=10.3, v0=4.66769832783, vM=5.30929489981``` fcM is cutoff frequency at exit xM is length v0 is entry angle vM is exit angle step is the cutoff step to use for iteration len is the number of vectors in the throat curve
 13th January 2015, 11:09 PM #4 more10   diyAudio Member   Join Date: Feb 2011 Location: Solna Now there is a dxf file for the 200T adapter.
 24th January 2015, 01:22 PM #5 more10   diyAudio Member   Join Date: Feb 2011 Location: Solna Now the script accepts input and output angles.
 21st February 2015, 05:35 PM #6 Chano diyAudio Member   Join Date: Mar 2012 Thank you Mårten !

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