http://heyhelen.com/2010/03/an-a-is-not-an-a/ Science Writer Thu, 09 Sep 2010 21:23:05 +0000 http://wordpress.org/?v=2.9.2 hourly 1 http://heyhelen.com/2010/03/an-a-is-not-an-a/comment-page-1/#comment-699 SteveBetz Thu, 04 Mar 2010 17:14:10 +0000 http://heyhelen.com/?p=1565#comment-699 Being a spectroscopist, I was really interested when I learned that orchestras tuned on A-440 -- and when I learned this, I asked my teacher how did "they" agree on 440Hz for that note? She couldn't answer -- so now I know! Being a spectroscopist, I was really interested when I learned that orchestras tuned on A-440 — and when I learned this, I asked my teacher how did “they” agree on 440Hz for that note? She couldn’t answer — so now I know!

]]>