Have also posted this is Adaptive and Disabled Cycling thread. I am partially sighted and hard of hearing (I wear hearing aids). My hubby and I took delivery of a tandem today and need advice on how best to communicate. I assume I will be best off leaving my aids out due to sweat, rain and possibly being uncomfortable with a cycle hemet on (private aids so not cheap either) and as a VI person I can't rely on hand gestures from my hubby so we are thinking about some kind of communication device (I can hear music etc. through in ear headphones so am not completely deaf). Any recommendations/advice appreciated.