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 ...

The kit itself is made using through-hole components, with an ATTiny85 as the core microcontroller to drive two TCT40-16T ultrasonic speakers, and a MAX232 to provide a USB interface drives the ...

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 ...

Researchers in China set up a loudspeaker to broadcast voice commands that had been shifted into ultrasonic frequencies. They said they were able to activate the voice-controlled assistant on a ...

Upgraded Ultrasonic Technology: This solar animal repeller uses state-of-the-art ultrasonic technology, which creates more powerful ultrasonic wave, accompanied at the same time by an alarm sound ...

USound, the global leader in MEMS loudspeakers, today announced the showcase of its fully developed ultrasonic sensing module at CES 2025 in Las Vegas, Nevada. Demonstrations of the ready-to ...

USound, the global leader in MEMS loudspeakers, today announced the showcase of its fully developed ultrasonic sensing module ...