“…Considering that speech discrimination usually improves along with pure tone hearing thresholds, only improvement could result in an additional benefit to the patient's quality of life 7 . Higher recovery rates at low frequencies are common, and are found for therapies other than hyperbaric oxygen therapy 7 , 12 , 26 , 44 – 46 . Patients with the most severe hearing loss seem to improve more than patients with mild hearing loss, which can progressively worsen even during hyperbaric oxygen therapy 24 …”