Yeah,
the Receiver Dongle is the only one that explicitly states:
"RECEIVER
Just plug this dongle into your commlink and you get Noise Reduction 2 for your commlink and all slaved devices! Great for spam zones"
The Antennae have the following, somewhat cryptic text:
"Each antenna, to a maximum of three, reduces Noise by 1 for the user. And only the user."
I mean, what is that supposed to mean? Noise reduction for all gear you use? Only for the device your persona is on? Only for you and your living persona?