A particular method includes receiving program data designating media content to be recorded at a media recorder. The energy-absorption apparatus is configured to absorb external energy associated with an external impact force applied to the energy-absorption apparatus. In another embodiment, a noise constraint is lowered by decreasing finger spacing. This solution also permits the conversion of oil-wet solids in the fluid into water-wet solids. In one embodiment, transparent covers may be provided so that the film bulk acoustic resonator filter may be exposed to laser irradiation to either add or remove material from the filter and to thereby adjust its frequency.