It's basically a long plastic tube that is folded in on itself like a small bowel intussusception to create an inner compartment
It works. I do vocal/singing exercises with this and very loud shouts are muffled to about the volume of a normal speaking voice. I used to be nervous about being too loud for the neighbors but this keeps things quiet enough. It's basically a long plastic tube that is folded in on itself like a small bowel intussusception to create an inner compartment that dissipates the sound. Your mouth goes on one end, sound comes out the other. I have nothing bad to say about it other than it's a bit expensive for what is essentially a piece of plastic that cost probably less than $1 to make. But I really needed something like this and it gets the job done.
Rating: 4 stars