Good job guys! That is exactly what it is.
It has many names but I have always known it as a
Jews Harp. It was also the instrument Snoopy used whan he was jammin' with Woodstock.
Too funny Chris!
Frampton and Walsh songs.
They used a talkbox but they have similiar sounds that's for sure.
I haven't gotten my lip stuck in it yet, that sounds painful.