The ultrasonic speakers are in an array of small units that all emit very high, non-audible (ultrasonic) sound waves. Because they are in an array and interact and mix with each other, they can create audible frequencies which are very focused like a beam, making it very different than no...
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Oscilloscope. This enables simulating the output value of an oscilloscope as the gobo. For example, any value that can be displayed on the oscilloscope could be used as a gobo with a finite width. This could include sine waves, square waves, straight waves, sawtooth waves, and the like. ...