I bought this headphone there are 3 well until I dropped one ear or the other then I was ready to throw in the trash but I dismounted and I realized that blowing on the membranne direct his walk again! (and yes the membrane and glue makes contact, the sound arrives)

what I do for it working again:

I removed the foam that protects it and I put a screw (type autotarodeuse) in the holes in the plastic that protects the mebrane not too long screw, the latter allows the membrane to stick, and music returns. Once the mouse glued over the screw does not feel the ears (recess should not take concrete screws! And do not over tighten and make a short screw)

good luck I have half an hour to do my headphone and walk again as new (economy € 29)

feel free to ask me questions if you want to attempt the repair, I will provide photos and more details.