A miniature lightweight transmitter that mechanically generates low-frequency acoustic energy is described, wherein one or more miniature balloons filled with air are positioned at the center of a pressure vessel filled with water and tethered in place. One exemplary fusible print medium, among others, includes a substrate and an ink-receiving layer disposed on the substrate. A plurality of solder balls are disposed individually over a plurality of lands formed on a lower surface of the wiring substrate. By connecting two power bond pads to a common buffer the inductance associated with the buffer is reduced, thereby reducing the number of active buffers needed to be dedicated to providing power to the semiconductor device.