What is this sound barrier called?

I’ve seen the sound barrier pictured previously. I’ve even known what it is called but I cannot remember. Is there anyone here that can identify the panel attached to the ceiling of a high school auto shop?


(Water damaged) Acoustical ceiling panels??? Be more specific in your questioning.

It looks like it may be Green Building Boards Soundproof Fiberboard | Homasote from MI.

Thank you Larry.

The photo is not a real good one and I do not have an opportunity to capture another. It is not Homasote. :frowning:

The product is more like a spun plastic and is spaghetti like in it’s pattern.

Maybe that description will help?


THAT’S IT BARRY!!! Thank you

is it a possible asbestos type product?