Hi, I'm having a bit of an issue trying to find a headset that fits the following specific needs: 1. Noise-isolating/cancelling....headset is needed for someone who works with a lot of loud machinery and wants as much of it blocked out as possible. 2. A decent microphone that can cancel out ambient noise fairly well (do all "invisible" microphones suck? He's had a few and they simply do not perform well) 3. Bluetooth Wireless. Be able to connect it to iPod/phone easily enough. Battery life is nice but not extremely important. I've tried finding him a few different headsets but none of them seem to do the trick with "invisible" microphones and without any real noise-cancelling abilities. Any and all suggestions would be greatly appreciated, thank you.