Pffft...two clicks on other links and I find a report that says the final 'recording' doesn't have any sound file in it. That would explain why it isn't being heard !

Two ways of testing it were reported. One was with a dog listening and seeing when it reacted, the other was to download the file and to put it in a program that allows you to look at audio files visually.

I just did the 'dog' test on the links to your page. Nope. No recording. The pricking of Doggie-girl's ears tells me that there is no sound in the last file.

Cute trick.