Pure tone audiometry (PTA) is a test designed to determine the hearing threshold in the way of air and bone in a range of frequencies. In other words, PTA shows the status of the auditory cells in the cochlea of the inner ear.
What is PTA for?
The aim of the test is to determine the threshold of hearing, ie. the minimum volume that the patient hears. The test result is the graph – audiogram, hearing threshold curve for air and bone conduction, on the basis of which it is possible to determine the size of hearing loss.
How is the PTA performed??
Pure tone audiometry is completely non-invasive. It is carried out in special headphones for air and bone conduction, separately for the right and left ear. Each ear receives sounds with certain frequency ( pitch) and volume, while patient’s taski is pressing the button when he hears a stimulus.
The test is conducted in cooperation with the patient and allows to pre-determine the nature and depth of hearing loss.
It is one of the simplest and most common hearing tests, providing valuable information on the hearing. The patient does not need to specifically prepare for the study.
The test result of pure tone audiometry is an audiogram , which is a curve of hearing threshold for air and bone conduction. The audiogram is the basis of the diagnostic.
Pure tone audiometry in children:
Due to the need for cooperation of a patient with the hearing care professional or the audiometrist, PTA is performed in children over 6 years of age. In younger children there are other pediatric tests performed, according to the developmental age).
Audiometric tests in children above 6 years of age is a diagnostic test in case of suspicion of hearing disorders, concentration and auditory attention disorders, speech therapy, as well as for control after infection or inflammation of the outer or middle ear and third adenoid’s diagnostics.
Author: Aleksandra Stojak