Ultrasonic device-to-device communication for wearable devices

A wearable computing device comprising:

• at least one processing device;
• a memory storing instructions that when executed cause the at least one processing device to perform operations including:
• transmitting, from at least one audio output device on a first wearable computing device, a first signal via a first protocol;
• receiving, by the first wearable computing device and responsive to the first signal, a second signal via the first protocol from at least one audio output device on a second wearable computing device, the second signal including an identifier associated with the second wearable computing device;
• establishing a wireless connection between the first wearable computing device and the second wearable computing device, the wireless connection based at least in part on the identifier associated with the second wearable computing device provided via the second signal, and the wireless connection using a radio signal and using a second protocol different from the first protocol;
• and
• causing, by the first wearable computing device and using the wireless connection, a retrieval of information from the second wearable computing device.

A non-transitory, computer-readable medium having instructions stored thereon, the instructions, when executed by processing circuitry, cause a wearable computing device to:

• transmit, from at least one audio output device on a first wearable computing device, a first signal via a first protocol;
• receiving, by the first wearable computing device and responsive to the first signal, a second signal via the first protocol from at least one audio output device on a second wearable computing device, the second signal including an identifier associated with the second wearable computing device;
• identify, by the first wearable computing device, a location of the second wearable computing device with respect to a location of the first wearable computing device, the location of the second wearable computing device being identified based on a determined time-of-flight of the first signal;
• establish a wireless connection between the first wearable computing device and the second wearable computing device, the wireless connection based at least in part on the identifier and the location associated with the second wearable computing device, and the wireless connection using a radio signal and using a second protocol different from the first protocol;
• cause, by the first wearable computing device and using the wireless connection, a retrieval of information from the second wearable computing device;
• and
• cause presentation of the information on a display associated with the first wearable computing device.