Quote: I tried using two types of earbuds, one Monoprice and one Sony, and with my "main" headphones the Technics RP DH-1200. With all the noise is noticeable, and switching to airplane mode doesn't change it in the slightest. 

I managed to make a recording in which the noise in audible from a recording. I got the a free MP3 audio book from The Call of Cthulhu and played it at the lowest audible level. Then I recorded it from minijack out on the cell phone to line-in on my netbook. I made the recording level high in...