Coaches communicate during games using headsets, and intercepting the communications among opposing coaches could be potentially useful if injury information and strategy were discussed.
It still allows drivers to talk using headsets or speakerphones.
But amid the revelry, the staff communicated using headsets, checking that the operation remained unnoticed outside.
Very unofficial surveys on the Garden State Parkway and Interstate 80 found that most drivers using cellphones were using headsets.
Founded in 2015, the DRL sees competitors pilot custom-designed craft through three-dimensional courses using headsets giving a first-person view.
But Ms. McArthur said that several studies show that drivers using headsets face the same likelihood of crashing as someone holding the phone to their ear.
Medical staff members and patients in the adult medicine and mental health departments now have the option of speaking with one another by using headsets that connect with simultaneous interpreters, five floors above them, who speak Spanish, Cantonese and Mandarin.
Some of the demonstrators appeared to be well organized, using headsets and walkie talkies to communicate with one another and keep track of the police and different parts of the protest group.
Mark Zuckerberg, Facebook's C.E.O., noted then that, while Oculus has been mostly focussed on video-gaming gear, he had much broader ambitions; he imagined people using headsets to transport themselves to classroom lectures or to visits with doctors.
As with those services, the new AOL Phoneline service, to be introduced May 16, will allow users to call each other free if both are online, typically using headsets or microphones attached to their computers.
