Buy arduino, buy sound shield, buy distance sensor shield, plug into each other, burn example code, stuff components inside box. Not only is this not a hack but he might as well have just bought a ...

But for a weekend project, [Vinod.S] took the ultrasonic transmitter and receiver from a distance-meter module and used amplitude modulation to send music ultrasonically from his laptop to a ...

There are loads of unique sensors available on the market for Arduino boards. This gives you plenty of choices, but what Arduino sensors are out there, and how do you use them? 1.

Ultrasonic Range Sensors Bring Precision to Social-Distance Monitoring and Contact Tracing Sept. 2, 2020 Ensuring safe social distancing is one piece of the puzzle for workers in the COVID-19 age.