Device capable of being submerged and including an acoustic transducer

A portable water resistant device capable of undergoing submersion to a predetermined depth in a liquid such as water, in particular a water resistant watch, including a case in which is mounted an acoustic transducer so as to communicate in a water tight manner with the exterior of the case via acoustic energy, wherein

• said acoustic transducer is attached to a membrane which is able to be deformed, separating it in a water-tight manner from an inlet cavity which is arranged in said case and in direct communication with the exterior, wherein said membrane is resiliently applied by its periphery onto a rest surface arranged around said cavity separating the latter in a water-tight manner from a deformation chamber arranged in said case on the side of the membrane opposite to said cavity while being in communication with the interior of said case, and wherein the bottom of said deformation chamber forms a support surface for said membrane when an external static pressure greater than a predetermined value is applied thereto.