Often these are used for tuning guitars and other stringed instruments--usually there is a specific set of pipes for each instrument such as EADGBE for Guitar, GDAE for violin, etc. The 13 other keys on yours are probably an octave too high for your voice (I'm guessing) but you should still be able to match the pitch of the note, just an octave lower.

Now they make electronic chromatic tuners for about $30 which are just dandy. Instead of it singing to you, you sing (or play) to it and it tells you what note you're singing and whether you're sharp or flat. I got one for my kids for Christmas but "forgot" to give it to them.