MUSIC PRO 16dB (Med) For Artists: Our medium protection filter is an ideal filter for lead vocalists or choir. Best for situations where hearing softer sounds are still important to the experience. Examples might include a jazz club, the movies or sports stadiums. MUSIC PRO 20dB (High) For Artists: Our 20dB reduction is a great solution for guitarists, bassists, pianists or keyboardists. The best all around filter for music. Perfect for situations such as a music festival where safety is critical but you still want to be able to communicate with others. MUSIC PRO 24dB (Max) For Artists: We recommend our Max filter for drummers and other percussionists. Best for environments where you need extra protection. Examples include indoor concert venues or arenas where the sound can stay elevated in the 115dB range for extended periods of time. Music PRO 27dB (Ultra Max) Our Ultra Max filter is the highest protection we offer.