Is Your CPAP Too Loud? What's Normal and How to Quiet It
CPAP machines have come a long way. Modern units operate at 25-30 decibels, quieter than a whisper, softer than a refrigerator hum.
If your machine seems loud, something may need attention.
What's Normal
Normal sounds:
- Gentle hum when running
- Slight increase in sound when breathing in
- Soft exhaust from mask vents
Not normal:
- Grinding or rattling
- Whistling
- Gurgling
- Dramatically louder than before
Common Noise Causes
Mask Leak
The sound: Whistling, hissing, or rushing air
The cause: Air escaping around mask cushion or at connections
The fix:
- Adjust mask position and headgear
- Check cushion for wear
- Ensure connections are secure
Tubing Issues
The sound: Rattling, vibrating, or flapping
The cause: Loose connections, tubing touching surfaces, or damaged tubing
The fix:
- Secure all connections
- Route tubing away from headboard and furniture
- Check for holes or cracks
Humidifier Gurgling
The sound: Water sounds, bubbling, sloshing
The cause: Water in tubing (rainout), overfilled chamber, or tubing routed incorrectly
The fix:
- Don't overfill humidifier
- Route tubing so it slopes down from mask to machine
- Consider heated tubing
Dirty Filter
The sound: Machine working harder, louder motor
The cause: Clogged filter makes blower work harder
The fix: Replace filter (every 2 weeks for standard, monthly for fine)
Machine Position
The sound: Amplified vibration, reverberating noise
The cause: Machine on hard surface that transmits sound
The fix:
- Place on carpet or soft mat
- Don't put directly on nightstand
- Keep away from walls
Troubleshooting Steps
- Listen without mask: Turn on machine, listen. Is noise from machine or mask area?
- Check filter: Dirty or blocked?
- Inspect tubing: Secure connections? Holes? Condensation?
- Test mask seal: Hold mask to face without headgear. Leaking?
- Check humidifier: Water level correct? Seated properly?
When to Get Help
Contact your provider if:
- Noise is new and nothing you try helps
- Machine is making grinding or mechanical sounds
- Noise is affecting your sleep or partner's
May need:
- Equipment inspection
- Filter or cushion replacement
- Machine service or replacement
Living with Some Sound
Even perfect machines make some noise. To adapt:
White noise machine: Masks CPAP sound with pleasant background
Fan: Creates ambient sound and air circulation
Ear plugs for partner: Soft foam plugs block minor sounds
Time: Most people stop noticing normal machine sounds after a few weeks
Still having noise issues? Log into Drift and message our team. [Log in →](/patient/login)