An audiogram is the result of an audiometric test carried out by a physician.
It enables us to evaluate a patient’s auditory capacity.
The test involves the emissions of sounds of variable frequencies and intensities for which the patient’s threshold of hearing are recorded.
For each frequency, the graph shows the difference between the level of sound perceived and a reference level.
The unit used is the dBHL, for “decibel hearing level”.
The test is carried out for each ear.
The normal threshold of hearing is less than 20 dBHL for all frequencies.
To help fully understand what the notions of frequencies and intensities correspond to here are some illustrations representative of our sound environment.
The banana shaped region in the middle corresponds to the vocal spectrum. The sounds produced in conversation are located in this region.
This patient’s audiogram reveals an auditory loss which interferes with his ability to perceive certain sounds, principally in the high pitch range…
What you are hearing right now is a simulation of what the patient perceives.
Our auditory faculties decline with age, principally in the high pitch ranges. This is presbycusis.
This phenomenon, more or less marked in different individuals, is normal.
For this reason, conserving one’s auditory assets is very important.
We often forget that deafness is classified as being at the top of the list of professional diseases…
The increase in the number of young people displaying hearing losses has become a true public health problem.
These troubles, often irreversible, are the result of prolonged exposure to noise.