Method for contoured horn wavefronts similar to JMLC

[Chris Hornbeck]

I discovered Jean Michel Le Cleac'h just recently, so I missed him by a few months. What a great loss for us all.

My father had done something similar contemporaneously, and I'm going to try to post some of his papers in case anyone's interested.















Chris

 

[Chris Hornbeck]

Here's a 400 Hz horn with comparison to (flat wavefront approximation) exponential:











Chris

 

[Chris Hornbeck]

This is the way it was done before spreadsheets. Yikes!









Chris

 

[Chris Hornbeck]

Many years later, Jack revisited the problem, and here shows a way (in Derive - this is early days of spread sheets) to make the calculations directly, without step-wise approximation.

















Chris

 

[Kolbrek]

Very interesting. Thanks for sharing.

-Bjørn