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The Hearing Mechanism: A Guide for Laymen I can hear these sounds”. Nevertheless, since 1837, science has tried to answer two important questions: how do human ears allow us to hear faint sounds, such as a whispered voice, and how do they allow us to hear sounds at various frequencies? The famous German scientist Helmholtz (1821–1894)insincerity 发表于 2025-3-22 07:10:06
Hearing Impaired: Invisible Disabilitybut others may be born with one or more of the five senses impaired. Hearing organ is one of human senses which functions to receive information in the form of vibration like a radio or television antenna. The sounds and voices that a human hear will develop his/her verbal communication while the so不适 发表于 2025-3-22 12:25:30
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Primary Necessity and Support for Hearing Impairment in China —Present Status on Medicine and Educatidered to be the main etiology. According to the National Sampling Survey of Disabled Person that was carried through by the State Council of the People’s Republic of China in 1996, hearing impairment (deaf) people are about 20,570,000 (16.8%o of whole population), among which 9,490,000 are elders,