Hearing loss can be experienced in varying degrees, such as mild, moderate, moderately-severe, severe or profound. Additionally, this loss can also vary depending on pitches or frequencies. A series of hearing tests can determine the amount of loss you experience compared to an average of many other adult listeners with typical hearing.
The volume of sounds you hear is measured in decibels (dB), 15-20 dB being the softest whisper and 120 dB being a jet engine. The softest sounds one can hear are called thresholds. Normal hearing thresholds for adults are considered 0-25 dB across the range of frequencies tested. Speech testing is also conducted as a part of this series of evaluations and helps to assess the levels of particular words you can hear clearly. These tests can help determine the type of hearing loss you’re experiencing, which can be categorized conductive, sensorineural or mixed.
Sensorineural Hearing Loss
Sensorineural Hearing Loss (or nerve-related deafness) involves damage to the inner ear caused by aging, pre-natal and birth-related problems, viral and bacterial infections, heredity, trauma, exposure to loud noise, fluid backup or benign tumor in the inner ear. Almost all sensorineural hearing losses can be effectively treated with hearing aids.
Signs and symptoms of Sensorineural Hearing Loss may include:
- Perceiving speech and other sounds distorted or unclear
- Difficulty hearing certain pitches (usually high pitches)
- Hearing a ringing or buzzing sound that is constant or periodic
- Difficulty understanding speech in the presence of background noise
Conductive Hearing Loss
Conductive Hearing Loss involves the outer and middle ear that may be caused by blockage of wax, punctured eardrum, birth defects, ear infection or heredity, and often can be effectively treated medically or surgically.
Signs and symptoms of Conductive Hearing Loss may include:
- Perceiving speech and other sounds as faint or muffled
- Ear pain or discharge from the ear
- Redness or swelling of the outer ear
- Pressure or fullness in the ear
Mixed Hearing Loss
Mixed Hearing Loss refers to a combination of conductive and sensorineural loss and means that a problem occurs in both the outer or middle and the inner ear.
Signs and symptoms of Mixed Hearing Loss may include:
- Perceiving speech and other sounds as faint or muffled
- Ear pain or discharge from the ear
- Redness or swelling of the outer ear
- Pressure or fullness in the ear