An underwater audio system includes a framing having at least one speaker mounted thereon and at least one upwardly extending arm member. The arm member(s) are arranged to slide under the strap of a diver's mask in use and to be held in place between the strap and the diver's head. Two speakers mounted on the frame are arrange to be located adjacent a diver's ear when the arm members are in place under the strap of the diver's mask.
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