Eargasm earplugs have the ability to reduce noise by up to 21 decibels and have a Noise Reduction Rating (NRR) of 16 dBs. However, unlike foam or earmuff protection that block out all sound, Eargasm Earplugs reduce noise levels proportionally while maintaining sound integrity. It is like having your own volume knob for life! You hear everything, but at safe and enjoyable levels. At the heart of each ear plug is an attenuation filter. These filters reduce noise to safe levels while preserving clarity of speech and richness of music. Sounds are reproduced exactly as your ear would hear them but at a reasonable volume.