Sometimes I am blown away with what I don’t know. That’s not to imply I think I know everything. Instead, I’ve been in the audio business a while and I’ve seen pretty much everything. Recently I discovered a new dimension of the audio biz – a solid and growing commercial audio niche known as Sound Masking. It’s been around for over 50 years, and a few months ago I joined one of the industry-leading companies, Cambridge Sound Management. Our product plays a special kind of noise in office environments ON PURPOSE – which for an audio guy like me first sounded, frankly, bizarre.