West African Talking Drum

Also known as a "gan gan" in the Yoruba language. The drum heads are made from hide, fish skin or other membranes which are wrapped around a wooden hoop.

Leather cords or thongs run the
length of the drum's body and are wrapped around both hoops; when you squeeze these cords under your arm, the drum heads tighten,
changing the instrument's pitch.

I saw this demonstrated at a Black History Month event in my library today.