 Cough and sputum production are common in Bronchiectasis and chronic obstructive pulmonary disease COPD, both of which are associated with significant morbidity and other adverse clinical outcomes. Airway clearance techniques ACTs such as afforded by oscillatory Positive Expiratory Pressure oPEP Aerobika aim to remove sputum from the lungs, however evidence of their efficacy during stable disease is unclear. 