![]() ![]() ![]() The student’s t-test showed that the student heard the tone but did not hear it. (NCAR) has developed a classification system based on these criteria, which is called the Hearing Loss Classification System (HLCS). SSS is used to describe loss in the range of 50 to 70 dB that is severe enough to interfere with a person’s ability to communicate effectively. “Severe” loss is defined as 40 to 50 dB (or more) and is considered the most severe type of loss. Hearing loss that borders between the two categories is usually labeled as a combination of the two categories. Mild, moderate, severe, or profound are the degrees of hearing loss that can be described. What are the four degrees of hearing loss? Anything over 85 decibels is considered to be a hearing impairment. Hearing loss is defined as any threshold that is over 20 dBHL. Normal hearing range is from 0 dBHL (Decibel Hearing Level), which is the audiometric zero, to 20 dBHL. The most common cause of mild hearing damage is exposure to loud noise, but it can also be due to a number of other factors, including: a history of ear infections or other ear problems, a condition known as otitis media (inflammation of your ear canals), or a tumor in your eardrum (tumor). Damage to this area can lead to hearing problems such as tinnitus (ringing in the ears) and noise-induced hearing impairment (NIH), which can cause problems with concentration, memory, speech, and hearing aids. This type the hearing losses are usually caused by damage to the cochlea, which is the part of the inner ear that converts sound waves into electrical impulses that travel through the ear canal and into the brain. These sounds include rustling leaves, bird chirps, and the hum of a car engine. Loss can be associated with the inability to hear soft sounds. Hearing loss can be mild, moderate, moderately-severe, severe and profound. You can also use an audiogram to find out if a person has a hearing loss. For example, you can use them to help you determine if someone is deaf or hard of hearing. Audiograms can be used in a variety of ways. An O represents the right ear while an X represents the left ear. What do the symbols mean on an audiogram?Īudiogram is the universal way to represent someone’s hearing in the form of letters and symbols. What are the four degrees of hearing loss?.What do the symbols mean on an audiogram?. ![]()
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