Professional Voice?

So I get an email about student information on the program's web page and it occurs to me people other than friends might actually begin reading this page.  Other than Alex's blog ------>>>>>

Most of what I read of blogs is more or less like what you're reading here.  Pretty conversation with a small group of peope in mind.  So do I need a professional voice?  Could look at one of the several blogs I know of from others in my program.  It's odd how such a voice was pretty easy for me to develop in my short run podcast, but here not so much.  More later...