Cheers guys, glad I'm not going crazy. I actually think it's bad recording/mastering or if it's purposefully part of the track, then the sound engineer's a wacko. Oh wait....wacko jacko - honestly that just came to me .
You know there is some guy playing the hell outta that triangle or bell or whatever is making that noise. I'm sure the recording session went something like this famous documentary on The Blue Oyster Cult's biggest hit: http://FunnyOrDie.com/m/458l
RE: noise canceling or wireless headsets.
I will probably NEVER reach for either of these gimmicks in a headphone for music pleasure again. Wireless headsets work by playing the inverse sound of whatever environmental sound to cancel it out into your ear, a theory which does alright in practice, but you get a background hiss, the cancelation sometimes bleeds into messing with the music, and you run into distortion problems with the internal amp. Wireless headphones have similar problems, and it's worth considering how much of the purchase price goes into the internal amp, DAC, sound processors, transmitters and other doo-dads that are built-in and unable to be upgraded.
I did have an active noise-canceling headphone for a while to use on planes... Other than the hassle of batteries, the noise-canceling actually made listening to music fatiguing more quickly for me than the IEMs that are my buddy now.
For what it's worth, IEMs are far more noise isolating than any active noise-canceling headset, and obviously more portable. The dampening is so profound, I had my dad yelling at me during a Macworld Expo, and I had to ask if he was actually talking or just mouthing words to be funny. Another benefit is that, in creating such a quiet listening environment, it is easy to listen to music at quieter volumes. I use my 6 year old Etymotic ER6i IEMS on airplane rides every time, they worked perfect for me once I figured out which interchangable ear tip was most comfortable for me (surprisingly, the large silicon ear tips. Etymotic also started an interesting custom earmold coupon program recently). When I'm in a place where I'll need to hear some urgent sounds from the real world, or if I need to be able to take off my headphone frequently, I'd rather use closed headphones like the M-100 (My LPs have good enough isolation for me, most of the time).