"Theory for design"
Manausen
"The software of Gian Piero Matarazzo was used for the study of the horn. Horn1.exe is software written, saved, and sold on a floppy disk along with the aforementioned book "The Design of Horn Speakers". Although with some modifications, the program remained the same exact sequence of equations from Horn64 with the transfer function assembled thanks to the studies of Small, Keele, Young, and Margolis and the numerous additions of other illustrious researchers.
Choice of driver with related parameters.
Definition of solid angle of radiation
Calculation of optimal SD/ST ratio
Definition of the number of segments of the actual horn
Development of openings
Calculation of the front volume inversely proportional to the maximum desired frequency and the rear volume for the reactance annulling of the horn itself."
"I cannot fail to mention the valuable help of Architect Paolo Viappiani, who kindly offered to review the entire project and evaluate and correct the processed data and calculations."