A dual poppet valve assembly for a pump assembly of an implantable penile prosthesis having a suction poppet engagable by a plurality of fingers allowing free travel of the poppet and to prevent vacuum lockup of the pump assembly. The invention also relates to a polymerization process using the catalyst. This can be achieved by providing a microphone in the auditory channel whose signal level is compared with that of an external microphone. The hole of the valve body is closed when the closing valve is in contact with the valve body, and open when the closing valve is in contact with the valve seat. The wireless configuration information may be accessible only through the use of a security code. The fluid flow velocity is determined by measuring the propagation delay of a direct path pressure wave signal transmitted through the fluid as a function of a frequency difference rather than as a phase delay measurement.