Devices and methods for monitoring respiratory activity of a patient. The system includes a first sensor for sensing the acoustics of the patient during breathing and a second sensor for sensing chest wall motion of the patient during breathing. Specific aspects of the patients breathing can be determined based on the sensor readings. This may include whether the patient is experiencing regular breathing, slow breathing (hypopnea), fast breathing (tachypnea), no breathing (apnea), or obstructed breathing. The methods and devices may further be configured to trigger an alarm in predetermined situations.
