Subject: How does humidity affect pitch.

I am doing a science fair project about how humidity affects pitch. My project 
consists of measuring the humidity of a room and then playing a scale on a 
musical instrument (i.e. piano, clarinet, violin). I would then determine the 
pitch of the instrument. However, I am at a loss. Searching for "pitch" on the 
internet generally brings up information about baseball and any search 
for "musical pitch" or "musical pitch and humidity" brings up nothing that is 
relevant. I need information to help me creat my hypothesis as well as 
understand my results. Thank you for your time.

Re: How does humidity affect pitch.