Auditory commands

[Woodsyfeller]

I have a question about goats ability to be trained to whistles or hand signals. Due to an illness i have lost the ability to speak. The best i can do is a grunt and with some effort i can actually bleat like a goat. Thats about it for voice commands. 

What i would like to know is has anyone trained their goats to whistles or hand commands? Is there someone who i can refer to on this subject specifically or is this a whole new frontier when it comes to training goats.