Audio/visual device with central control, assistive listening, or a screen

An audio/visual integration device for a classroom, comprising:

• a first audio/visual endpoint coupled with a first content source of the classroom, the first audio/visual endpoint configured to receive a first audio/visual data stream from the first content source;
• a second audio/visual endpoint coupled with a public announcement (PA) system of the classroom, the second audio/visual endpoint configured to receive a second audio/visual data stream from the PA system;
• a speaker for outputting audio data associated with the first audio/visual data stream or the second audio/visual data stream into the classroom;
• a screen to display text or images associated with the first audio/visual data stream or the second audio/visual data stream into the classroom;
• and
• an ultrasonic transceiver configured to exchange, with a device, a plurality of signals over a plurality of sound waves operating in a first set of frequencies above a frequency range detectible by a human ear to establish a wireless communication link that uses electromagnetic waves with the device.

A system, comprising:

• a stationary device positioned in a classroom and communicatively coupled with one or more devices for inputting or outputting multimedia content relative to the classroom, the stationary device configured to:
• receive, from a device, a first signal indicating a volume control level of an audio output device;
• and
• transmit, to the audio output device, a second signal indicating the volume control level received from the device;
• and
• the audio output device positioned in the classroom and communicatively coupled with the stationary device, the audio output device configured to:
• receive, from the stationary device, the second signal indicating the volume control level;
• receive, from an input component of the audio output device, a second volume control level different than the volume control level;
• determine a relative priority of the volume control level and the second volume control level based at least in part on a source of each volume control level;
• select the volume control level or the second volume control level as the output volume based at least in part on determining the relative priority;
• and
• output, to a user of the audio output device, audio data at an output volume indicated by the volume control level.