I saw a device that makes train horn sound on the internet. I just imagined that I could design something like it and that it could be 3D printed. I did not have the actual product with me. The design was experimental and strait out of imagination. I just made the name up as THORN, putting Train and Horn together, haha. After designing, printing, and testing it, it did really sound like train, and final design came out louder than I expected. The sound nearly hurts my ears. I would not recommending to blow too hard without ear plug. I hope you like it.
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