Subject: Why does the ceiling fan change how my flute sounds?

I came home the other day after walking in some obscene temperatures to 
practice flute in my living room. I turned the ceiling fan on high because of 
the heat, and stood on a chair so I could see my music on top of the piano. 
When I was playing, I noticed this shaking sound on the notes, it was like 
involuntary vibrato that I had nothing to do with, so I concluded it was 
because of the fan. It was especially noticable on high notes. 
Why did the ceiling fan change the sound so much? Why was it worse on higher 
notes?

Re: Why does the ceiling fan change how my flute sounds?