Radiation is projected onto a plurality of targets on a substrate. When the pass band center frequency is set as a first center frequency and the center frequency of a filter defined by the inductance of the first and second inductors and the capacitance of the first to third acoustic wave resonators is set as a second center frequency f2, f1 is less than f2. By entering a specific code, which may be supplied by a dealer, the user may activate an additional block of airtime. In this way, a user of the near-end telephone system may be alerted that the sound quality of a far-end user is unacceptably low, so that the near-end user may take corrective action at the near end to improve the far-end sound quality. The shower apparatus periodically varies a volume of air taken into an aeration unit by periodically changing a traveling direction of a water stream ejected to the aeration unit from a throttle unit and produces pulsating spray by varying the instantaneous flow rate of bubbly water discharged from a nozzle unit. Following generating the data, the method can include sending the data corresponding to the second totalizer to at least one of a retail system and a central inventory management system.