I work at a museum and for our next exhibition we need to have video 1 playing through projector 1 with audio through set 1 of wireless headphones. We need to have video 2 playing through projector 2 with audio through set 2 of wireless headphones. The two wireless headphone transmitters will be about 15 feet apart, but the two sets of headphones themselves will be relatively close to one another. Is this possible without the headphones picking up both sets of audio? We have yet to buy set 2 of wireless headphones and was wondering if a different brand would prevent them from connecting to each other?