Objective: To compare the hearing effects of imitating and digital hearing AIDS on middle and serious elder deafness.
目的：比较模拟助听器与全数字助听器对中重度老年性听力障碍患者的助听效果。
The hearing-impaired say digital phones interfere with hearing aids.
听觉障碍者反映数字电话会对助听器造成干扰。
The hearing-impaired say digital phones interfere with hearing aids.
听觉障碍者反映数字电话会对助听器造成干扰。
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