Welcome to the product training for AC40 audiometer. On this page you will find an overview of all the available training materials and support.
The Hughson-Westlake procedure is an automated pure tone audiometry test. During the ascending portion of the tone presentation, the threshold of hearing is determined by requiring the patient to provide 2 out of 3 (or 3 out of 5) correct responses. If the patient responds when the tone is ascending, the test will automatically decrease the level by 10 dB. To record the threshold, the patient needs to respond to the same intensity 2 out of 3 or 3 out of 5 times. Intensity increases occur in 5 dB steps, while intensity decreases happen in 10 dB steps.
To measure only one frequency, select the desired frequency and then press on the button Single.
To obtain a threshold including the high frequency range press the button High. Note The range is only available if it is selected in the Setup │ Auto settings.
Setup │ Auto settings allows for changing the threshold method 2 out of 3 or 3 out of 5. The frequencies included in the test is selected by ticking of the frequencies.