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The global hearing aid market exhibited moderate growth during 2015-2020. A hearing aid is a small battery-powered electronic device that is used to improve hearing and is worn in or behind the ear. It is used to amplify the sounds to listen, communicate and participate in the daily activities by individuals with low hearing abilities. A hearing aid consists of an amplifier, microphone and a speaker that magnifies sound vibrations entering the ear, perceive larger vibrations and convert them into neural signals that are passed into the brain. The devices are available in a wide range of designs and are customized according to the requirements of the user. For instance, the device may have analog or digital technology for amplification of sound or have earpieces or earmolds to direct the flow of soundwaves and enhance the output quality.