Results of experiment

№	sound composition	syllable structure	word stress	Number of points
1st group
1	3	5	4	4
2	5	5	5	5
3	5	5	5	5
4	5	4	4	4,3
5	5	5	5	5
6	4	4	4	4
7	4	5	3	4
8	5	5	5	5
9	5	5	5	5
10	3	3	3	3
11	4	4	4	4
12	5	5	3	4,3
13	4	4	4	4
14	4	4	5	4,6
2nd group
1	5	5	5	5
2	3	3	3	3
3	4	4	4	4
4	5	5	3	4,3
5	4	4	4	4
6	5	5	5	5
7	4	4	4	4
8	4	4	3	3,6
9	5	5	4	4,6
10	3	4	3	3,3
11	4	4	5	4,3
12	5	4	4	4,3
13	5	4	4	4,3
14	4	4	4	4

From table 2 it can be seen that the level of development of phonetic skills of students in grade 9 of the first group has increased significantly. So the percentage of students with a high level of development of phonetic skills increased by four students with an average level of development of phonetic skills increased and amounted to 9 people, students with a low level of development of phonetic skills amounted to 1.

So, the percentage of students in the second group with a high level of development of phonetic skills increased, but not significantly, and amounted to 2 students, the percentage of students with an average level of development of phonetic skills did not increase, the percentage of students with a low level of phonetic skills decreased by 1 person.

Figure 2 - The result level of phonetic skills

When comparing the results of the second test with the first, we saw that in the first group the level of development of phonetic skills increased, and in the second group, where no special work was done, it increased, but not significantly. After analyzing the results obtained at the beginning and end of the experimental work, we can conclude that after the implementation of the audio complex, phonetic exercises that contribute to the development of the phonetic skills of high school students, significant changes occurred in the first group, and the level of development of phonetic skills increased compared to the level of development of phonetic skills of students of the second group.

Figure 3 - Comparison of results before and after the experiment

It follows that the development of phonetic skills of students in grades 9 will be ensured if the teacher systematically works on the development of phonetic skills in English lessons.

Thus, based on the results of experimental work, we can judge the effectiveness of the audio complex of phonetic exercises in the English language during the formative experiment, which gave positive results in the development of the phonetic skills of secondary school students.