Hearing Testing - What You Need to Know?
If your child is experiencing difficulty hearing, a hearing test may be necessary to find out the exact cause and severity of the problem. This test is based on two main tests: auditory brainstem response (ABR) and acoustic reflex testing. Both tests measure the activity of the auditory nerve and determine the location and severity of hearing loss. ABR testing is also used in newborns to screen for potential hearing problems. The child will wear earphones and have electrodes attached to his or her head and scalp. The electrodes will detect brainwave activity in response to sound intensity. Nowadays, mobile hearing testing is available in various clinics without the need for a sound booth. You can easily get the test done using mobile audiometers. The most common type of hearing test is pure tone audiometry, which involves listening to a series of tones at various pitches. The patient wears headphones and sits in a sound-treated room. The audiologist will play a series of tones and speech in varying intervals to determine whether the patient can hear them. The patient is instructed to raise their hand when they hear the tones or press a button when they do. The results of the test will be charted on an audiogram. Before the test, the audiologist will examine the ears to make sure the eardrum is intact. He will also check for fluid within the middle ear, which is indicative of a middle ear infection. Some people may experience hearing loss as a result of aging, genetic disorders, and noise pollution. Other common causes include trauma or birth complications to the ear and certain medications and toxins. In addition to the above conditions, some people may develop hearing problems after exposure to loud noises and antibiotics. The second type of hearing test is OAE testing, which involves a small probe with a microphone attached to it. This probe then stimulates the hair cells inside the cochlea and measures the response. The response will show whether an individual has normal hearing or a hearing loss. The results of OAE tests are used to determine whether there is a blockage in the ear canal or excess fluid in the middle ear, which may lead to hearing loss. One of the most important tests to determine hearing loss is to have a baseline audiogram. This visual image shows the softest sounds of different frequencies. The intensity of these sounds is represented on the vertical axis, while the frequency is depicted on the horizontal axis. If the sounds are too loud for the listener, they can't hear them at all. If they can't hear these sounds, then they have hearing loss.