Q&A for How to Make a Realistic Farting Noise

Yes, you can.

No. I have tried it in the past, but it gives more of a quirky tight fart noise as opposed to a loud wet "blarp" that comes from these methods. Another one of my favorite methods is putting my soggy wrists together and blowing tightly in between the small protruding crack.

Yes, you could try making sounds with your mouth or using objects like straws, plastic container lids, etc.

Use Method 1, but put your hand behind your knee instead of in your armpit.

That is literally the point. If you don't want people to hear you, don't do it around other people.

Use the palm of your hand, or the thick fleshy part of your forearm against your mouth.

It's possible, though others might think it's juvenile. Be sure not to do it in an inappropriate location (classroom, church, etc.).