Objective

2

This study was to make seven Pilot Directive monosyllable word lists with phonemic balance characteristics according to pilot mandatory speech vocabulary

evaluate the equivalence of Pilot Directive monosyllable words

and establish the performance-intensity function of flight personnel with normal hearing

and improve the speech audiometry system of flight personnel.

Methods

2

According to the common requirements and the three-dimensional balance of Mandarin pronunciation and vowels

250 monosyllable words used by military pilots were selected

and were recorded five Pilot Directive monosyllable word lists (each table contains fifty words). Thirty male active duty pilots (the age range 18-25 years) with normal hearing were selected as study subjects

five Pilot Directive monosyllable words serve as test vocabularies

six presentation levels (0

5

10

15

20 and 25 dB HL) were used for evaluation

and the record the speech recognition rate of each word list at each sound intensity. The order in which each subject's test word was listed was random. SPSS 26.0 was used to analyze the results.

Results

2

These word lists were considered to be primarily equivalent with each other (

P

=0.111). The recognition rate scores showed significant differences under different sound levels (

P

<

0.001). The average slope of the P-I function was 5.62%/dB. The average sound pressure level of speech corresponding to a 50% recognition score was (8.92±0.21) dB HL

and the steep slope was 5.25%/dB. The recognition rate of 20% to 80% linear area average slope is 4.39%/dB.

Conclusion

2

Five word lists of fifty words of these Pilot Directive monosyllable words can be considered to have equal difficulty

establish the performance-intensity function

and be used to test speech recognition.