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对一名女性重度耳聋患者，她仅在５００Ｈｚ以下有一定残余听力，对其使用赛佛助听器时的听力改善，进行了实验研究。采用的方法是进行言语可懂度测试和辅音知觉混淆矩阵分析。在三种不同的条件下进行可懂度测试：（１）不带助听器；（２）只带助听器不加唇读；（３）既带助听器又加唇读。结果表明：（１）赛佛助听器有利于提高声调识别率；（２）使用赛佛助听器，多音节词可懂度提高得比单音节词要多；（３）赛佛助听器可使单词可懂度提高４０％，音节清晰度提高２５％；（４）赛佛助听器对改善辅音发音方法的感知帮助较大，而对发音部位的感知帮助不大。
For a woman with severe deafness, she had some residual hearing below 500 Hz and conducted an experimental study of her hearing improvement when using a Safa hearing aid. The approach used is speech intelligibility test and consonant perception confusion matrix analysis. The intelligibility test is conducted in three different conditions: (1) without hearing aid; (2) with lip aid without lip reading; (3) with hearing aids and lip reading only. The results show that: (1) Saiful hearing aid is helpful to improve the recognition rate of tone; (2) Saifu hearing aid can improve the intelligibility of multi-syllable words more than monosyllable words; (3) Saffi’s hearing aid can make words understandable 40% increase in syllables and 25% increase in syllable sharpness; (4) Sawyer hearing aids help to improve perception of consonant pronunciation method, but not to perceive pronunciation part.