3 Fun Horns

thingiverse

These 3 horns are designed to bring a blast of fun and make a lot of noise together. The largest horn produces a lower tone, similar to that of a foghorn, while the smallest horn produces a higher tone. I adapted dougfeig's "One Piece Deafening Horn" design to create a more visually appealing horn shape with two rings to keep the rubber band in its correct position accurately. Warning: never point these horns at another person, as they can produce sound that is truly deafeningly loud. To make the horns work, stretch either a balloon or plastic food film (Saran Wrap) over the mouthpiece and hold it in place with a rubber band, as shown in the picture. Make sure to trim the balloon or plastic wrap to clear the side blowhole. A rubber balloon produces a deeper tone while the plastic wrap generates a higher tone. The horn dimensions are as follows: horn_tiny_160129.stl measures 95 mm tall by 90 mm by 90 mm, horn_small_160127f.stl stands at 180 mm tall by 90 mm by 90 mm, and horn_big_160129d.stl reaches a height of 280 mm by 130 mm by 130 mm. Four ANSYS classic APDL scripts were used to create the .stl files: mk_horn_tiny_160129.mac, mk_horn_small_160127f.mac, mk_horn_big_160129d.mac, and nice.gsav view orientation file, as well as ansys_2_stl_append_130131.mac, an ANSYS to .stl converter available at http://www.thingiverse.com/thing:50851. I utilized the free download of netfabb to fix flipped triangles accurately.