Practicing the battery, I must admit that these caps do their job. They reduce the sound without distorting it. It's simple, it's like a filter, like we fell sound.
These plugs can also be used in concert as a spectator. Besides, I highly recommend the use of plug concert. Unlike simple foam plugs, they will prevent you from having a sound that sizzles because of the saturation of your ears. We then better appreciate the concert. By cons, it will play with the depression because too sink, he will remove you too deep, too much bass.
Also, do not wear them too long on history relieve your ear canal.
There are 2 sizes, I tried 2, these are the smallest and is feeling better, it does not depart too ear canals.
