Folded (reentrant) Horn, parametric

cults3d

Design of folded (reentrant) horn typically used in public address systems. For more information on horn theory, visit Wikipedia at https://en.wikipedia.org/wiki/Horn_loudspeaker. The reentrant horn effectively amplifies sound, but sacrifices low-frequency performance. Watch the demonstration here: https://youtu.be/as_s8Ir7qb0. This horn was designed using Autodesk Inventor and its properties were made parametric for modification. You can adjust the cut-off frequency, horn length and width, speaker radius, and other parameters as needed. Review the image attached and video: https://youtu.be/0CKh6awGGPM. The horn's shape is hyperbolic in design. The source Inventor file is included with this design. This published horn design was parameterized specifically for loudspeakers of the type: "1.5" inch 4Ohm 4Ω 3W Full Range Audio Speaker Stereo Woofer Loudspeaker" You can find this type of speaker on eBay at http://www.ebay.com/itm/331269348255?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT. Note: the base part includes a supporting cylinder (brown part in the picture) for better print quality. This can be disabled in Inventor if you prefer not to use it. You can also review my Hyperbolic Horn design on Thingiverse at https://www.thingiverse.com/thing:1915305.