An assembly of devices designed to stimulate a reflex cough using ultrasound in a patient who cannot cough on command, typically respiratory patients with cortical insufficiency (e.g., unconscious, comatose, anaesthetized, obtunded) or the very young/elderly, to help clear the lungs of secretions and aspirated materials (e.g., inhaled fluids or vomitus). It typically consists of: 1) a mains electricity (AC-powered) generator that produces amplified pulsed electrical signals; 2) a handpiece with ultrasonic transducers that convert the electrical signals to ultrasound for external application to the patient?s pharynx via disposable gel pads, to elicit cough reflex; and 3) a connecting cable.