Development and equivalence analysis of disyllable lists for directive speech audiometry for flight personnel

DANG Ziyi; ZHAI Lihong; WANG Meng; JIN Zhanguo

doi:10.13276/j.issn.2097-1656.2025.01.013

Abstract：Objective To develop seven sets of disyllable test materials with phonemic balance characteristics,and carry out equivalence analysis.Methods According to the common principles,500 disyllable words commonly used by military flight personnel in air-to-ground communications were screened out.Thirty pilots from fighter aircraft,transport aircraft and helicopter respectively were selected to investigate the common use of the word lists,343 disyllable words with the same difficulty were determined,and seven disyllable word lists(49 words each)were made according to the principle of phonemic balance.Twenty-eight flight personnel aged 18 to 25 years old were selected and seven directive disyllable lists for flight personnel were used as test materials.The speech test was conducted using four fixed intensities of 0,4,8 and 12 dB HL in order from low to high.The subjects listened to the seven word lists in different orders,and recorded the speech recognition rate of each word list at each sound intensity.SPSS 26.0 was used to analyze the results.Results There was good equivalence between the seven word lists(P＞0.05).There were significant differences in speech recognition rate under different test intensities(P＜0.001).The average slope of the performance-intensity function(P-I)was 4.12％/dB.When the recognition rate was 50％,the average intensity of the given sound was(4.31±0.35)dB HL,and the slope was 7.28％/dB,which was the steepest part of the curve.The average slope of recognition rate 20％to 80％linear area was 4.98％/dB.Conclusion This study shows that the seven directive disyllabic lists for flight personnel have good equivalence,and the P-I curve of flight personnel with normal hearing is established,which can be used in clinical testing,experimental research and medical identification.