SYSTEM, INHALER, AND METHOD OF MONITORING

1 - 20 . (canceled)

21 . A system for use with an inhaler, the inhaler having an actuator housing having a mouthpiece, the system comprising:

a loudspeaker disposed within the actuator housing, wherein the loudspeaker is configured to emit an acoustic pulse during use of the inhaler by a patient;

a microphone disposed within the actuator housing, wherein the microphone is configured to receive reflected sound generated in response to the acoustic pulse; and

a controller communicably coupled to the microphone, the controller configured to analyze the reflected sound received by the microphone and determine based on the reflected sound at least one of a position of the tongue of a patient or whether lips of the patient are sealed around the mouthpiece of the actuator housing.

22 . The system of claim 21 , wherein the controller is configured to determine the shape of the oral cavity.

23 . The system of claim 21 , wherein the controller is further configured to determine whether the tongue of the patient is obstructing an airway of the patient based on the reflected sound.

24 . The system of claim 21 , further comprising a muffle disposed around the microphone.

25 . The system of claim 21 , wherein the controller is further configured to control the loudspeaker to emit the acoustic pulse immediately prior to, during, and/or after an inhalation of the patient.

26 . The system of claim 21 , further comprising a passive acoustic device disposed within the actuator housing and communicably coupled to the controller, the passive acoustic device being configured to monitor at least one of an inhalation flowrate, a total volume of inhalation, and a timing of actuation of the inhaler within an inhalation cycle.

27 . A method of monitoring use of an inhaler by a patient, the inhaler having an actuator housing, the method comprising:

emitting, within the actuator housing, an acoustic pulse during use of the inhaler;

receiving, within the actuator housing, reflected sound generated in response to the acoustic pulse; and

determining a parameter of the patient's oral cavity based on the reflected sound, wherein determining the parameter of the oral cavity further comprises determining based on the reflected sound at least one of a position of the tongue of a patient or whether lips of the patient are sealed around a mouthpiece of the actuator housing.

28 . The method of claim 27 , wherein determining the parameter of the oral cavity further comprises determining the shape of the oral cavity.

29 . The method of claim 27 , further comprising determining whether the tongue is obstructing an airway of the patient based on the reflected sound.

30 . The method of claim 27 , further comprising emitting the acoustic pulse immediately prior to, during, and/or after inhalation.

31 . The method of claim 27 , further comprising the monitoring at least one of an inhalation flowrate, a total volume of inhalation, and a timing of actuation of the inhaler within an inhalation cycle.

32 . An inhaler for delivering a medicament to a patient, the inhaler comprising:

an actuator housing comprising a mouthpiece:

a loudspeaker disposed within the actuator housing, wherein the loudspeaker is configured to emit an acoustic pulse during use of the inhaler by the patient;

a microphone disposed within the actuator housing, wherein the microphone is configured to receive reflected sound generated in response to the acoustic pulse; and

a controller communicably coupled to the microphone, the controller configured to analyze the reflected sound received by the microphone and determine based on the reflected sound at least one of a position of the tongue of a patient or whether lips of the patient are sealed around the mouthpiece of the actuator housing based on the reflected sound.

33 . The inhaler of claim 32 , wherein the controller is further configured to determine whether the tongue of the patient is obstructing an airway of the patient based on the reflected sound.

34 . The inhaler of claim 32 , further comprising a passive acoustic device disposed within the actuator housing and communicably coupled to the controller, the passive acoustic device being configured to monitor at least one of an inhalation flowrate, a total volume of inhalation, and a timing of actuation of the inhaler within an inhalation cycle.