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thays Did you know that, as we age, we can no longer hear certain high-pitched noises as well as we did during our youth? There are sound frequencies that only young people can hear. This ear-aging process is called presbycusis, and it can begin as early as 18.Mar. 3, 2015
thays Did you know that, as we age, we can no longer hear certain high-pitched noises as well as we did during our youth? There are sound frequencies that only young people can hear. This ear-aging process is called presbycusis, and it can begin as early as 18.Mar. 3, 2015
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