The determination of the audibility threshold (threshold of hearing)

Laboratory work №1

The determination of the audibility threshold (threshold of hearing)

Purpose of the work: To determine the audibility threshold (threshold of hearing) for different audio frequencies.

1.1.  Audiogram getting using audiometer (УДК) (Fig.1).

Fig.1. Audiometer

Work algorithm:

1.  Put on the headphones (You must pay attention to marks of left “L” and right “R” ear).

2.  Set the frequency by using handle 5.

3.  Press and hold up button 3 for the left headphone or the button 4 for the right headphone.

4.  By using handle 6 find the value of intensity level corresponding to sound audibility.

5.  Write the values of frequencies and the level of intensity for the left and the right ear in Table 1.

6.  Draw the audiogram for the left and the right ears.

7.  Make a conclusion.