Helmet comms issue after offshore job

[marinehabit4ttechnician]

Just got back from a saturation dive, and I've been having some issues with my helmet comms. I can send and receive audio, but it's all coming through the speaking diaphragm; the earphones aren't working at all. I've checked the connections and swapped the leads, but nothing's changed. Has anyone else dealt with this kind of problem?

 

[TitledDocument1]

I'm almost certain it's a problem with the earphones or the plug or the wiring. Do you have another set of earphones that you know are working?