Noise Blocker is a term used to describe a device that is designed to reduce or block out unwanted noise. An example of this is an earplug, which is a 7-letter word that can be used as a solution to the crossword puzzle. Earplugs are small devices that are inserted into the ear canal and help to reduce the amount of sound that enters the ear. They are often used in situations where loud noises are present, such as concerts, construction sites, and other noisy environments. Earplugs are also used to protect hearing from long-term exposure to loud noises.