Jan 23, 2018 · • Ask patient to breath in and out through the mouthpiece (not the nose). Instruct to inhale deeply and force- fully for 2-3 seconds, slight pause (under a second), then exhale forcefully for 2-3 seconds. • Cue the patient to listen for a strong ‘wind’ sound for audio biofeedback as a strong, audible airflow should be heard for inhale and exhale..