Skin-patch type infusion pump comprising a resonant buzzer

A therapeutic fluid dispensing device to deliver a therapeutic fluid into a body of a patient, the device comprising:

• a controller to control one or more of fluid delivery operations and notification operations;
• at least one auditory notifier to produce one or more acoustic signals in response to application of one or more activation signals by the controller;
• a plurality of electrical contacts coupled to the at least one auditory notifier to enable the application of the one or more activation signals to the at least one auditory notifier;
• and
• at least one housing retaining the at least one auditory notifier therein, wherein the at least one housing being structured to resonate at least one of the one or more acoustic signals produced by the at least one auditory notifier in response to application of at least one of the one or more activation signals;
• wherein the controller includes instructions operating thereon configured to:
• determine at least one resonant frequency of the at least one auditory notifier;
• apply a plurality of signals to the at least one auditory notifier to generate a corresponding plurality of acoustic signals, each signal in the plurality of applied signals having a corresponding frequency within a frequency range;
• identify from the corresponding generated plurality of acoustic signals an acoustic signal having the longest duration of the respective durations of the generated plurality of acoustic signals;
• and
• identify from the plurality of applied signals the applied signal that caused the generation of the acoustic signal having the longest duration.