I got my machine around 2-3 months ago, and it took me alot of calling and complaining to the salesman and therapists to iron out all the kinks.  Mine makes a sound, too, but it doesn't bother me.  Maybe your machine is malfunctioning.

I had to solve several problems since I first got it.  First of all, it made a knocking noise in my nasal mask because of too much condensation.  They told me I had the humidifier set too high.  After I adjusted that, I noticed an annoying whining noise coming from the machine.  I discovered that I was cleaning the parts often enough, so once I did, that problem was solved.  Then I discovered my straps were either too tight, or too loose, so I finally got those adjusted.  My final problem with the nasal mask was that it put too much pressure on the bridge of my nose, making it red and swollen the next morning.  So I ordered another type of mask, one that fit in my nostrils, instead of on my nose.  Unfortunately, the nasal pillows did not stay inside my nostrils, and leaked all night, disrupting my sleep.

I sent this back, and asked the salesman what to do about the pressure on my nose.  He suggested getting Moleskin, a thin strip to put on the mask itself, so it wouldn't hurt my nose.  I got some at a Walgreen's Drugstore, but discovered it was too thin to fully protect my nose.  Finally, I solved the problem - I bought special small, round bandaids for sensitive skin from Wal-Marts, and put four of them nightly to cover the bridge of my nose.  That solved that problem.  Lastly, I made sure the mask was down far enough so it lay on the bandaids on the bridge of my nose, so it made a tight seal, and didn't leak.  Now I sleep with it just fine.  Whew!

The salesmen and therapists told me these problems were very common with people who used a CPAP machine.  So hang in there, and don't give up, until your problems with it are solved.  Persevere, and you will be rewarded with a good night's sleep, like the rest of us who are now used to our machines.

Denise Phares/kitties4

Mine's pretty quiet. But on mine, there is an attachment I'm supposed to use if I don't use the humidifer.

I have had the same problem. In the beginning, 26 months ago, I used silicone earplugs to be able to put up with the noise. Now  I am able to sleep without earplugs, but I do keep the CPAP on the floor on a rug. I also use a rubber band to hold the hose to the headboard and off my shoulder. Hope this helps.

Diana

I have the humidifier on mine and it is no louder with the humidfier on or off. 

They should have filled it for you when they were showing it to you so you made sure everything was working properly.  It sounds like there is a malfunction somewhere, I would call the company that gave it to you and have them come back out.  Even when mine is almsot out of water it doesn't make a sucking sound. 

How are you doing? I've been getting more used to my bipap now that my cold is gone. I still only have it on for about 2-5 hours every night, but I know it will increase with time. I have noticed that I feel more comfortable with the pressure setting (18/14) than I did when I first got it. I didn't want to be discouraging, so I had to post again.