Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Do these headphones block out snoring?
Document: I purchased the Bose QC 20s a while ago, and while I had used them almost exclusively for noise cancelling, I almost never used them for listening to music. Weird right? Well...my husband snores, and rather than killing him, I though it best to wear something to block out the noise.The QC20s allow me to lie next to my husband and never hear his snoring. At All.
Awesome noise cancelling for airlines. Transformative - you truly don't hear the noise.Wife wears them when my snoring bothers her. She gets to the Land of Nod and stays there.
Really like these when in an airplane-cancels the majority of this noise. However, if using to cancel snoring, I found it only amplified it. Also, unless you are a back sleeper, not very comfortable on the ears.
I didn't anticipate how efficient these are. I bought them for reading while a spouse was snoring. I was hesitant because of the price. But I keep them on after I finish reading to minimize the snoring noise.
My wife and I each got a pair of the QC20i's for a recent trip. We expected them to help with the noise on the airplanes and for this they were great. We did not expect them to help so much with sleeping in a city environment. Also, they made my wife's snoring disappear. Try them on and you will be sold. The battery pack is a minor inconvenience when they are being used without a source.
Been a Bose fan for fifteen years. Have never been disappointed. The active noise cancellation works as advertised and the sound reproduction is good, but not at the same level as a pair of Shure 535SE earbuds, which use passive noise cancellation (buried to my eardrums.) Will be interesting to see if the active noise cancellation works on snoring.
I love the sound in these. Really clean clear & the noise cancelling works really well. I personally didn't find them as comfortable as other reviewers did - but I was trying to find something to use when falling asleep to cancel out my hubby's snoring! But really good quality & certainly comfortable for normal use.
I have always owned big over the ear cup headphones, having worked on a sound desk I believed there was only one way to block out the noise and that was a complete seal around your ears (and active noise cancelling if you could afford it).
In my cubicle environment these come in handy and block probably 90 percent of noise. I notice that particularly percussive or low frequency noise does get in, these earphones don't create an eerily silent experience. but they do silence much more than do my over the ear non-noise-cancellig Bose headphones.
I bought these when my company lowered all the cube walls and I was having a difficult time with distractions. These headphones block out all the noise going on around me and have really helped me focus. I usually do not listen to music when I am wearing these. I just turn the headphones on and enjoy peace and quiet.
Answer: I was able to check this out this morning as my wife was snoring due to cold/flu. With the aware option on, you'll hear white noise and full blown snoring. Tune off the aware the normal deep breathing sound are masked completely and in my estimation the snoring goes from 10 on a 10 scale to a 1. You'll  still hear a tiny bit but I really had to listen closely to distinguish the snoring from the white noise.