A friend of mine recently visited the CES (Consumer Electronic Show) convention here in Vegas. One of the freebees he brought back with him was the most obnoxious noisemakers I'd ever hear. Of course, it had some obscure company's name printed all over it. Well, looking it over I thought, "Hey! I could make this!" Today, I did.
Watch the video. It's not as irritating on the recording, but when you try out your own, don't blame me if your dog starts howling along!
Sorry about the distortion at the begining of the video. You Tube added that.