If you are going to have a tour guide, then by all means make it so everyone can hear. I did not understand a word. It was lousy. The tour guide warned of the poor acoustics and he was right. Once the tour started, I didn't hear a thing. Why have a tour if the paying customers can't hear? They need to fix the problem before charging money.
The museum was interesting, but overpriced. Not a place for handicapped people, only access is by stairs.
The road to the museum was terrible, with a poor location.
I would not recommend visiting this place. Buy a book or watch a DVD about it.