Hey, this is really cool! There is a high pitched whistle I can do with my front teeth, and I was finally able to measure it using this tool. Running it on two

Hey, this is really cool! There is a high pitched whistle I can do with my front teeth, and I was finally able to measure it using this tool. Running it on two laptops, both are giving me a measurements of 4 - 8 kHz. I learned how to make that whistle 10 years ago, and have been wondering how high pitched it was ever since.