So hear me out…I am trying to design an emitter where the sound comes out of the hilt right next to the blade, and I think I have figured it out. @Driftrotor and I were talking about this yesterday.
Before this, I have always tried to channel the sound around the OD of the emitter, but what about the ID??
So, you start with a solid rod of aluminum, and drill holes…maybe a count of 4-8 (I did 6 here):
Then, you drill the center, and bore to 1" to hold the blade:
Taking this concept, I drafted a design for an actual emitter. 28 mm speaker and a 1" NPXL PCB holder from TCSS:
What do you guys think? I might try making one with a chunk of aluminum just to test it out.