trumpet 116dB

116dB TRUMPET!!!A simple trumpet with a shrill sound!Just blow into the tube to wake up the neighbors or, simply, it can be used at the stadium for the entertainment of children !!!WARNING!!! DO NOT USE DIRECTLY NEAR THE EARS OF PEOPLE OR ANIMALS!!! no special settings for printing, just place it on the plate with the wide part facing down.To make it work you need a rubber band and a balloon (a latex glove will also work)watch the video for assembly:MEMBRANE ASSEMBLY:When assembling the membrane, pay attention: the more the membrane is taut, the higher the sound will be and the harder you will have to blow; if it is less taut, you will have a lower sound but less force will be needed when blowing. And here is a very empirical test to test the sound pressureEMPIRICAL TEST IN dB:https://www.youtube.com/shorts/4b5phZ7KoBA