Directional Waveguide for Piezoelectric Horn Speakers
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This sonic waveguide will improve the directivity of piezoelectric horns to create very powerful soundwaves.
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Model information
- Source
- Printables
- Category
- Other House Equipment
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
I wanted to create a very loud speaker arrangement using four 3.5" Motran piezoelectric tweeters. This printed waveguide design boosts the sound directivity significantly.
The results are super loud & annoying soundwaves, much like the Ultrasonic Phaser Pain Field Generators used by police & military to disperse rioting crowds.
The sound generator is Arduino based with a drive circuity that boosts the output to 80Vp-p from 12VDC. Check out the schematics & the photos for the application.
For the application shown in the photos, the speakers are triggered when a particular noise is detected from a parabolic microphone.
Figure 1: 3.5" Motran Tweeter
Figure 2: Schematics