Creak Noise When Braking

For lack of a better term my car makes a creak noise or soft cracking noise when applying the brakes but the noise does not seem to be coming from the brakes but from under passenger side of car. When I leave in the morning and make the same right turn while applying the brakes I will hear a loud crack. If I turn around and try it a second time it won't do it so it's like cracking a knuckle or something. As I continue driving I can still hear it during braking but it's not as loud and doesn't do it all the time. I've been to the dealer a couple of times under warranty and they didn't hear it. The dealer told me the Subaru does not require lubrication under the car. My next step is to purchase a recording device so I can prove my claim. Has anybody every tried this and what type of recording device would be best to pick up a noise like this....if any experience? My car is approx 2 years old and has been making this annoying sound for the past 10 months so I'm at my wit's end. Any help would be much appreciated and once the car is fixed I will post the problem so somebody else won't have to go through this.