Used these to make DIY high isolation headphones for recording loud electric guitars (using a pair of drivers from a cheap, but good-sounding, pair of Panasonic headphones).  They are surprisingly nicely made and as comfortable as such things can be, given they are sealing off your ears from air circulation. They do a fantastic job of isolating me from the loud guitar amps in the room.  So now the loud amps are not hurting my hearing, and I can also turn down the level in my headphones, and monitor things at a much safer, more comfortable volume. Regular studio monitor headphones just do not block the loud sound enough to do this. Glad to save my hearing.  All parts, including these, for my DIY headphones cost $26. Mine are far superior in every way to most commercially made isolation headphones. You'd have to spend $220 on Ultra Phones (probably the best commercial high isolation cans) to do better than my homemade ones. And from the pictures on the Ultra Phone website, it looks very much like they used this exact muff (with much better drivers) in the making of their headphones.
Used these to make DIY high isolation headphones for recording loud electric guitars (using a pair of drivers from a cheap, but good-sounding, pair of Panasonic headphones). They are surprisingly nicely made and as comfortable as such things can be, given they are sealing off your ears from air circulation. They do a fantastic job of isolating me from the loud guitar amps in the room. So now the loud amps are not hurting my hearing, and I can also turn down the level in my headphones, and monitor things at a much safer, more comfortable volume. Regular studio monitor headphones just do not block the loud sound enough to do this. Glad to save my hearing. All parts, including these, for my DIY headphones cost $26. Mine are far superior in every way to most commercially made isolation headphones. You'd have to spend $220 on Ultra Phones (probably the best commercial high isolation cans) to do better than my homemade ones. And from the pictures on the Ultra Phone website, it looks very much like they used this exact muff (with much better drivers) in the making of their headphones.