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A hearing disorder or hearing deficiency is a total or minor reduction in the ability to perceive or recognise sounds. Hearing loss can happen to any organism that interprets sound because of a broad range of biological and environmental conditions.This Sound Amplifier allows people with hearing impairment issues to hear sound and voice like normal people. Unisound Vivo 11 SP focuses on what is really important. This BTE model has two trimmers for adjusting are placed behind the trimmer cover. The cover always remains closed to prevent dirt and moisture entering the instrument. “H” trimmer, used to eliminate background noise, turns clockwise for minimum low-frequency sound and maximum noise reduction. “P” trimmer, used to control the minimum output sound level, turns clockwise for maximum sound amplification. The transparent ear hook is suitable for wearers with serious hearing loss and offers a high degree of amplification.Its attractive and durable design is Powerful and Flexible to compensate for Moderate To Profound Hearing Losses. The combination of the tube, whose length can be shortened to suit you accurately, and a variety of super-soft, comfortable tips in various sizes that make it very easy to wear and an effective tool for you. The aerodynamic design of their housing offers a very secure fit behind your ears. Almost all demanding conditions this hearing aid is durable, robust and secure and is resistant to moisture, sweat, dust and dirt to escape the rigors of daily life.