The measurement degree of hearing loss ranges from no hearing loss to profound and beyond. When conducting a hearing test people are tested on a range of frequencies from low tones to high tones at varying sound levels to determine if hearing loss is present.
Sudden or rapid hearing loss can occur when sound reaches above 80dB for extended periods of time.
Hearing loss exists for people of all ages and is not gender specific. Although there is a much higher rate of hearing loss in men.
High frequency hearing loss is one of the most common types of hearing loss among all hearing loss. In most cases high frequency hearing loss is do to both noise exposure and aging. Also known as presbycusis hearing loss.
Sensorineural hearing loss occurs when there is damage to the inner ear (cochlea) or nerve pathways from the inner ear (retrocochlear) to the brain. Sensorineural hearing loss is permanent in nature and cannot be medically or surgically corrected. Sensorineural hearing loss involves a reduction in sound level, inability to hear faint sounds, and affects speech understanding and clarity. Sensorineural hearing loss can be caused by diseases, birth injury, toxic drugs, and genetic damage. Sensorineural hearing loss may also result from noise exposure, viruses, head trauma, aging, and tumors.
Conductive hearing loss occurs when sound is not conducted efficiently through the outer ear canal to the eardrum and the tiny bones, or ossicles of the middle ear. Conductive hearing loss usually involves sound level reduction, and inability to hear quiet sounds. This type of hearing loss can often be medically or surgically corrected. Examples of conditions that may cause a conductive hearing loss include: Middle ear pathology such as fluid in the middle ear caused by colds, allergies (serous otitis media), poor eustachian tube function, ear infection (otitis media), perforated eardrum, and benign tumors Impacted earwax (cerumen) Ear canal infection (external otitis) Presence of a foreign body Malformation of the outer ear, ear canal, or middle ear Mixed Hearing Loss Sometimes a conductive hearing loss, or mixed hearing loss, occurs in combination with a sensorineural hearing loss caused by damage in the outer or middle ear and in the inner ear (cochlea) or auditory nerve.
Mixed Hearing Loss is a mixture of both Sensorienural and Cunductive hearing loss.
It can be both no hearing loss present in one ear or hearing loss in both hears with one ear significantly worse than the other.
Unilateral hearing loss frequently creates what is known as head shadow effect. That is when sounds presented to the individual can’t determine the direction from which the sound is coming from.
A task like crossing the street can become increasingly dangerous if situational awareness is not more closely followed with visual cues.
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