I rated these 1 star because they did not satisfy the reason I purchased them ... primarily to cancel out engine noise while flying. While they do give you decent sound from your music device, the open-ear design pretty much negates the noise canceling function. I have owned noise-canceling headphones before, Sony. These were closed ear design and did a much better job of canceling engine drone and other low frequencies, tho I had the same annoying problem with crackling and popping when I moved that everyone else seems to have experienced. Bottomline, do not purchase these if your goal is to reduce air travel noise.