Diagnostic Audiologic Evaluation
If you or your child has been referred for a diagnostic audiologic evaluation, it means that hearing loss needs to be ruled out or further examined. The diagnostic audiologic evaluation may be indicated for individuals who did not pass an initial hearing screening.
The evaluation is done to determine if a hearing loss is present, and if so, to detail the type and severity of the hearing loss. It also may provide insight into the cause of the hearing loss as well as provide guidance for the audiologist in making appropriate treatment recommendations.
What Tests Will Be Done?
The audiologist will decide which specific tests should be done to determine the degree of hearing loss, the type of hearing loss, and the conditions of the ear canal and middle ear. The audiologist will also determine if the hearing loss is conductive (middle or outer ear problem) or sensorineural (inner ear problem or central processing difficulty of the brain).
A diagnostic audiologic evaluation includes pure-tone testing, bone-conduction testing, and speech testing.
Pure-tone Air and Bone Conduction Testing
Pure-tone air conduction testing determines the softest tones that a person can hear at different frequencies, both low and high. Bone conduction testing uses a different type of headphone, and the results help the specialist determine if the hearing loss is originating from the outer/middle ear or from the inner ear.
A speech reception threshold (SRT) test is often used with older children and adults to confirm the results of a pure-tone test. This test determines the lowest level at which the patient can recognize words or speech stimuli. Speech discrimination testing asks the patient to repeat words at a comfortable level. this assesses the person's ability to understand speech. If your speech discrimination score is poor, speech may sound garbled. These scores and be helpful in predicting the usefulness of hearing aids.
The audiologist may also perform otoscopy (examining the ear canal) and tympanometry (test of the middle ear) to determine the health of the ear canal and the middle ear.
What Can I Expect During a Diagnostic Audiologic Evaluation?
The evaluation will probably last about 30 to 40 minutes in length. You should also allow for time for discussion with the audiologist to review test results, and ask questions.
If the determination is made that you need hearing aids, allow for sufficient time to discuss your options.
It is recommended that you bring a family member with you to the evaluation appointment. Most audiologists agree that hearing loss is a family issue. It helps to have another supportive person at the appointment to help you understand the information and recommendations.
Before your appointment, the audiologist will want to hear about any complaints you have about your hearing. We will pay special attention to any concerns you have about exposure to noise, tinnitus, and balance problems.
The diagnostic audiologic evaluation is a good chance to establish a relationship with your audiologist. Above all, don't be afraid to ask questions. You will want to be clear on any information you receive so that you can be an active participant in finding hearing solutions that work best for you and your lifestyle.