Cochlea and hearing aid fitting and rehabilitation

In the cochlea, the area where the function of inner hair cells or auditory neurons is degraded or completely lost is called the cochlear necrosis zone.It was Dr. Moore, a British audiologist, who first attracted people’s attention to this phenomenon, and then the academic community began to strengthen research on it.The phenomenon of cochlear necrosis can explain that some patients cannot get the same effective hearing rehabilitation even though the audiogram is the same.Experts believe that understanding the characteristics of cochlear necrosis will help Hearing aid Fitting and rehabilitation.
过去有人认为,如果患者证明有耳蜗坏死区,由于无法从高频听力放大收益,建议限制这些患者的高频助听器放大。为此,美国听力学Cox等人试图证实这种假设的可能性。他们采用噪声平衡阈值(TEN)实验,对170位耳蜗坏死区频率在500到4000赫兹之间、年龄在38到96岁之间的成年人进行了深入的研究评估。结果显示,所有受试人员中,31%的患者在某一个或几个频率段上,大多有坏死区;68%患者,在耳蜗坏死区测试结果中呈阳性,不过仅在单侧耳耳蜗有坏死区;另外,值得注意的是,大多数单侧耳有坏死区的受试者仅在一个频率段上表现出坏死区特征。研究人员报告称,早期预测的耳蜗坏死区患病率在29%到84%之间。

These researchers pointed out that there are many similarities between the audiograms of subjects who test positive for cochlear necrosis and those who test negative. However, in general, the high frequency hearing of patients with cochlear necrosis The threshold is worse than those without the symptoms.The speech recognition speedometer under noise (ie QSIN) is used to detect the speech recognition ability of a person in a multi-person noisy environment.

In general, the speech recognition test revealed the fact that when the high-frequency sound has more information and clues, people who test positive for the cochlear necrosis area do better; while subjects without the cochlear necrosis area do better. Get more verbal information from high-frequency acoustic cues.The researchers said that this study could not prove whether limiting or reducing the high-frequency gain of subjects who tested positive for the cochlear necrosis zone would be of any benefit to patients.Therefore, they suggest that clinicians should insist on providing patients with proven conventional measures.

  Cochlea and hearing aid fitting and rehabilitation  https://www.jhhearingaids.com/

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