Signal Whistle ~ 87 dB

This whistle has two versions: 75mm keyed in Soprano, and 130mm keyed in Alto. Clocks in at 87 Decibels ongoing from 1 foot away. Long body allows for optimal sound. Many of the whistles I have seen on Thingiverse make only high pitch noises. Those sounds are not effective for signaling, as the human ear is optimized for moderate sounds. This instrument will make a loud and fuller sound. The design can also be scaled down in size for higher pitch. I prefer the low pitches for their mysteri