throat mics are OK but the $50 versions wont cut it. if you are planning on getting a throat mic then get one from a retailer that sells to the military or a PMC company, if you dont spend the money to get one of these then you will have the symptoms described above. the symptoms might take awhile to show up but eventually they will be there. i find boom mics to be more effective because they are alot clearer than throat mics. unfortunately ive gathered this info from online sources as well, however i did try a throat mic at OP:Red Dawn, and as experted it didnt perform as well as a boom mic would have.
hope that helps
sticks