Acoustic Horn

A project log for Tiny Time-of-Flight Plasma Theremin: the Plasmino

Music evolved! The Theremin for the 21st Century: Plasma speaker, MIDI output, Lasers!

DavidDavid 10/12/2018 at 07:230 Comments

Time to think about Impedance matching!

The shockwave produced by the plasma has a lot of force, but over a small small volume. So it probably is not very well acoustically matched to the surrounding air.  An Acoustic horn is a geometrical structure that helps match the impedance to get as much power into the surrounding air:

The plan is to use a bilaterally symmetrical horn to acoustically match the approximately 1-dimensional plasma speaker to the surrounding air:

 This will be printed in PLA, and contain the Arduino Nano, the VL53L0X sensors, and in the middle, the plsma spark-gap.