I'm a sax player in a 17 piece jazz band. I bought these to use during rehearsal which is in a room too small for the sound produced by the band. I have a pair of Dolby Dubs, which no longer seem to be made and so I went looking for replacements. The customer service person at my local Sam Ash recommended these from his personal experience. They are excellent. When wearing them I can hear myself and neighboring sax players to match pitch, which I could not do easily with the Dubs. They cut down the volume of sound being pushed my way so I didn't leave rehearsal with my ears ringing. I highly recommend them and would buy another pair immediately if these got lost.