We experimented using the camera with the boom attached which worked well because you can hear the speaker clearly however you cannot hear the other person asking questions if they were behind the camera or at a distance from the speaker. If they were the next to the interviewee, they could be heard clearly.
Moving on to more audio equipment, we used a wireless microphone recorder attaching it to the speaker. Attaching the microphone on the speaker, you could hear the slightest movements such as rattling very easily so if the speaker wasn't moving around a lot, the sound would clear.
We tried the Maranz however upon using it, one of the headphones weren't working however the audio was still clear and we could hear the speaker clearly. It is also best to keep still while using this equipment as fiddling with the wire and unnecessary movement can be heard and also includes into the recording of the sound.