reducing cable noises, "microphonics"
Two of the most common complaints from new IEM user are microphonic (or ‘cable noise’) and bone conduction. Microphonic is the phenomenon where the IEM user can hear noise (caused by IEM’s cable brushes against clothing or another object) transmitted by the cable into the IEM. Bone conduction is the phenomenon where the IEM user can hear noise (caused by body motion such as eating and walking) transmitted with in the body. Both of these phenomenon are the side effect of sealing the ear canal and forming an acoustic chamber that enhance such noise.
Microphonic can be ‘grounded’ by wearing the IEM in over-the-ear style or using a shirt-clip to stop the sound transmission. Some companies offer better cable that doesn't exhibit microphonic as much. Bone conduction can be limited by stop eating and walking softly (changing shoe). In the end, most user will get used to both and eventually forget about them.
Pretty helpful tip. I've been using the CX 400s behind the ear (you just loop the cable from the top front of your ear to the back, such that the chord is facing up rather than down) and it seems to help a lot. It's much more comfortable and doesn't take all that long to do once yo get used to the process.