A system for conveniently allowing a portable computer user to send and receive e-mail and other data across a computer network, like the Internet, without the need for the portable or laptop computer to have a modem or a conventional connection to the computer network. The nitrogen prevents the fuel tank ullage from becoming filled with flammable fuel fumes which can cause an explosion. The recording material has improved heat resistance in non-printing sections while maintaining the moisture-and-heat resistance in printing sections. In this regard, the actuator interface may be gradually deformable to permit the movement of the transducer andor the middle ear component, as well as, resistive to sudden movements of the actuator such that vibration at acoustic frequencies occurs between the actuator and the middle ear component. This disclosed method and device can simplify the manufacturing process.