In the diagnosis of human hearing loss the hearing thresholds are defined. The most vulnerable number of different frequencies, which he can hear.
The frequency of the sounds is measured by herts. (1 second per second). The more frequency of the sounds (the greater the number of heresy), the more loudly hears it.
Differential frequency sounds (tones) The procedure for hearing the thresholds is called a tonal audiogram. The tone auditorium is carried out with the help of a special device – Audiometer, which allows to deliver different frequency and level sounds. Normally, in the auditorium 125, 250, 500, 1000, 2000, 4000, 8000 hectares. Frequency sounds are coming. The level of sounds may vary from 10 dB to 120 DB with 5 dB bits (interval). During the examination the patient will be provided with earphones, and he must press the button to hear the sound. Various sound / tall sounds are provided to determine the level of the most vibrant sound that the person understands on all frequencies. Hearing threshold. When the sounds are delivered to the headphones, they get the heel thresholds – usually we hear the sounds. After that, the sounds, with the help of vibration, are supplied to their bones – evaluate the bone thresholds of hearing. Hearing the thresholds is important when considering the contour and sensory hearing loss.
As a result of audio auditing, the audio is taken – a graph showing the state of hearing. On the horizontal axis, the frequency of the sounds is in Herz (from 125 to 8000 hectares), and on the vertical axis – the sound level in the decibels (from 10 to 120 dB).
The continuous line of audio on the audio signifies the hearing thresholds with air transmitters, and the intermittent – ear thresholds with bone conduction. One diagram can be either one ear (2 lines) or at the same time (4 line – 2 continuous and 2 intermittent) results. In the latter case, the right ear results are marked with red color, and the left ear is blue. Hearing sessions are measured by decibels. The more you understand the worse, the more the hearing thresholds in the decibels.
Degree of hearing loss is determined;
The type of hearing loss is defined (conduction, sensual or mixed)
It will be selected and regulated by a drum apparatus to predict the efficacy of hearing prosthesis;
Decide on the expediency of cochlear implantation.