Sure, you may not be able to hear the latest pop song via playing over the radio right now via cell phone.
It should increase call quality dramatically, however.
Who cares if a few people can't be heard making their funky noises? re: http://en.wikipedia.org/wiki/Vocal_range#World_records_and_extremes_of_vocal_range
I live in Toronto and am constantly reminded about the fact of how loud our streets can get when talking on my phone away from home.