But a hackier way would be to build a parametric speaker that focuses soundwaves into a narrow beam like [Shane] did with this ultrasonic sound gun. As the directivity of a soundwave depends on ...

Used for marketing or instructional purposes when someone walks by, parametric speakers use ultrasonic frequencies, which are extremely directional but are beyond human hearing. Whereas a typical ...

But a hackier way would be to build a parametric speaker that focuses soundwaves into a narrow beam like [Shane] did with this ultrasonic sound gun. As the directivity of a soundwave depends on ...

As part of a Parametric Speaker prototype I am currently working on, I am planning to drive an Ultrasonic Transducers Array using a TI Class-D Amplifier TPA3111D1PWP. An Array of 50 transducers with ...