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助听器的发展可以分为四个阶段:第一阶段的助听器——无源助听器。它利用锥形体、海螺壳等的物理聚声作用来放大声音,这一时期经历了从远古至十九世纪末的数千年。第二阶段的助听器——模拟助听器。它所采用的核心技术是模拟电子线路,而无论助听器的外形是盒式、耳背式、还是耳内式,它历经百年,目前仍在低档助听器市场上占据主要份额。第三阶段的助听器——数字助听器。它是1995年由丹麦奥迪康公司发明的(Digi Focus)。它与模拟助听器的最
The development of hearing aids can be divided into four stages: the first stage of hearing aids - passive hearing aids. It amplifies sound using the physical polyphonic effect of cones, conch shells, etc., which experienced thousands of years from ancient times until the end of the nineteenth century. The second phase of the hearing aid - analog hearing aids. The core technology it uses is analog electronic circuitry, regardless of whether the shape of the hearing aid is a cassette, beak, or in-ear style, which is still a dominant share of the low-end hearing aid market for centuries. The third stage of hearing aids - digital hearing aids. It was invented by the Danish company Odicon in 1995 (Digi Focus). It’s the most analog hearing aid