so I did this a while back and sure you could hear air... if you listened very hard. I wasnt impressed. I was inspired by the duck call video. It got me thinking... If I start to close off the opening it should start to make more noise. So I started experimenting with different things. I stuck copper pipes reduced to 1/4', the air chuck fitting that screws into air tools, kids Kazoo. These were things I had laying around the house, but it didnt do much to help improve the sound. I then came across a part from my natural gas BBQ. Its the fitting that plugs into the gas line. This thing was perfect. I inserted it into the hose and at first it sounded very high pitched like a lazer, or an eagle shreaking. but it was loud!! It got annoying after a while. So I took it to work and started drilling out the opening little by little until I got it "tuned" to a sound that I like.... I want to post a video if the sound. How do you do it?? I dont have a youtube account.