What is the ambient sound level reduction when using any type of UE Pro In-Ear Monitors?

Custom molded in-ear monitors reduce the ambient sound level in the ear drum by -26dB, provided a proper fit and seal and the use of both monitors. Reducing the ambient stage level by -26dB allows the performer to protect hearing and not have the nede compete with loud levels of external noise. This results in better pitch and reduced vocal fatigue.