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How to reduce CPAP(Continuous positive airway pressure) exhalation port noise?

• How to reduce CPAP(Continuous positive airway pressure) exhalation port noise? which shape of exhalation port can help to reduce noise? which material such as sponge can help to reduce noise? Thanks!

• Answer:

  I'm not really familiar with CPAP, but this may help: 1# Find the exhalation vents on your mask. These are small holes that relieve the pressure in the mask when you exhale. If you use a mask that cups your nose, the vents are probably on the cup itself. If you have a mask that uses individual nasal puffs, the vent holes will be on the tubes leading up to the puffs. #2 Install diffusers if they were supplied with your mask. Diffusers are foam pads or rings that go over the vents on your mask. Check your supplies to see if diffusers were shipped with your mask, and install them according to directions. If you didn't receive diffusers, go on to the next step. #3 Cut a length of cloth tape to cover the vents. #4 Apply the cloth tape over the vent holes on the mask, or around the tubing if the vent holes are located there. Be careful the tape does not cover other mask components, such as straps, nasal cushions, etc. #5 Put on your mask and start up the CPAP machine. Check that the whistling noise is gone, and that you can still exhale easily through the mask. If exhalation is difficult, try a more porous tape, such as a gauze tape.