One of the simplest ways to send broadcast-type messages into the body, to be received by in vivo nanorobots, is aural messaging. A device similar to an ultrasound probe would encode messages on aural carrier waves at frequencies between 1-10 MHz. Thus the supervising physician can easily send new commands or parameters to nanorobots already at work inside the body. Each nanorobot has its own power supply, computer, and sensorium, thus can receive the physician's messages via aural sensors, then compute and implement the appropriate response. The other half of the process is getting messages back out of the body, from the working nanodevices out to the physician