[snip]
My money would be on the fact that it's intended to work on a noisy shop-floor. I'd be willing to bet that a mic and laptop would work quite happily in a quiet DIY garage, but add in a couple of running engines, a compressor, an air-tool or two, the odd dropped spanner and a generous helping of Chris Moyles... Then it'd be a different story.
Cheers,
Colin.