US Patent 10013900 Vehicle noise control and communication

This disclosure is directed to an automated aerial vehicle (“AAV”) and systems, devices, and techniques pertaining to canceling noise, generating audible communications, and/or generating visible communications. The AAV may include one or more propellers utilized, in part, to produce sound that cancels noise generated by one or more other propellers. Additionally or alternatively, the AAV may utilize one or more propellers to generate audible and/or visible communications.