Now this is a creepy use of a parametric speaker. There seems to be endless possibilities for what you could do with a parametric speaker.
Soundlazer Circuit Board and Stand
Once the case design was finished in Solidworks, a 3D printed ABS plastic test part was made to verify that everything fit correctly. After a few minor changes, the aluminum case was machined. Aluminum block being CNC machined into the Soundlazer case Finished prototype case after sand blasting and assembly Nice chamfered edge [...]
This is a good explanation of how parametric speakers work and a few interesting uses. The Soundlazer can do all these things and more.
Designing the case turned out to be as difficult as the circuit itself. A modern, “Apple” style case was the goal but with a retro feel. A classic microphone offered the inspiration for this design project. Classic Ribbon Microphone The high frequencies emitted by the Soundlazer presented some problems in the case design. [...]
The SoundLazer uses very small surface mounted components There is a whole lot of technology crammed into a small space in the Soundlazer. Many of the surface mount components are size 0402 which is going to make prototyping this board a bit tricky. Time to get out the microscope and tweezers for this soldering [...]
The design of the Soundlazer circuitry took place over the last year with lots of testing and some experimentation. Many of the results have been posted throughout this website. A line level, stereo headphone jack similar to the one found on most computers and iPods connects the ADAU1701 Digital Signal Processor to the outside word. [...]
This improved circuit incorporates a DSP (digital signal processor) with a 40KHZ ultrasonic parametric array. By adding compression and equalization, the quality of the audio signal is greatly improved. This audio or video has not been edited. You are hearing and seeing the results of parametric sound waves The ADAU1701 DSP chip processes the [...]