Stable internet connection for all participants - wired is best vs. Wi-Fi
Quiet, non-echoey space. Avoid empty-ish spaces, bare walls or floors, and high ceilings, or counter them with good microphone
Close-up view of faces through adequate web cameras
Speak close to and directly into high-quality, directional, noise-canceling mircrophones/headsets
All notifications sounds on all devices turned OFF
Compliance with ISO Standards (International Organization for Standardization)
For hybrid hearings with remote interpreters:
Same as for virtual, plus:
Good microphone and camera system in the courtroom/meeting room with AV bridge and each speaker at their own microphone NOT one microphone for everyone in the center of conference table or ten feet away on the wall-mounted webcam/screen
The interpreter should be able to hear every single speaker with crystal clarity and have good line of sight to them also through the cameras as zoomed in as possible on faces.
Ask interpreter for feedback and even advance guidance, whenever possible. Make adjustments.
Do not assume your device or webcam microphone is good enough for the space you are in. Test your setup in advance to know how you really sound to others.
Do not assume that non-interpreters can gauge what proper sound quality is for interpretation purposes.