CPAP is short for “continuous positive airway pressure” and is used to treat sleep apnea and can help treat prolonged tiredness during the day. Many individuals find that it is an effective treatment for daytime sleepiness and sleep apnea. However, frequent adherence problems render them ineffective as a result of nasal stuffiness, claustrophobia, and the risk of disturbing a spouse or partner in the same room. These accompanying issues limit the overall usefulness of this therapy. according to cpapsupplies.com, most CPAP manufacturers specify their decibel (dB) ratings for each breathing device; the average CPAP noise is rated at 30dB.