The invention provides biodegradable implants for treating sinusitis. Upon receiving a request for a seek from starting track to a destination track, a seek profile is obtained to control application of current to the actuator based on the seek profile, wherein the seek profile includes actuator current level and transducer target velocity control values for the seek operation based on said starting and destination tracks, to achieve a desirable acoustic output. Instances of analog front-end circuitry for each of the configured ports is also provided. The controller unit evaluates the reception signal fed to it from the receiving unit for whether abort criteria for tuning mode have been fulfilled or not, wherein the scanning process is continued until the abort criteria are fulfilled. The body of the center electrode is formed of a compacted and sintered conductive or semi-conductive ceramic material. The temperature of the water discharged from the water discharge point can be changed by rotating the control element when the second functional level has been assigned.