Enhanced speech is produced from a mixed signal including noise and the speech. and a pressure of 1-50 MPa, thereby converting the metal nitrite or nitrate into metal oxide, nitrogen and water. Such a precise attachment is realized by matching the pinholes formed in the nozzle plates to the corresponding pinholes formed in the base electrode plate and the edge-forming electrode plate. If the status reveals that the device is currently reported as lost or stolen, the device initiates an appropriate security action, such as the transmission of its location to a monitoring center.