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Audiogram showing a typical "noise notch" in the left ear (normal hearing in the right ear) "Conventional" pure tone audiometry (testing frequencies up to 8 kHz) is the basic measure of hearing status. [6]
Here's how to read an audiogram and a doctor's explanation of the most common results including sloping hearing loss, notched hearing loss, cookie-bite hearing loss and reverse-sloping hearing loss.
As of 2011 data, approximately 24% adults age 20–69 in the United States has an audiometric notch. [151] This data identified differences in NIHL based on age, gender, race/ethnicity, and whether or not a person is exposed to noise at work. Among people aged 20–29, 19.2% had an audiometric notch, compared to 27.3% of people aged 50–59. [151]
The shape of an audiogram shows the relative configuration of the hearing loss, such as a Carhart notch for otosclerosis, 'noise' notch for noise-induced damage, high frequency rolloff for presbycusis, or a flat audiogram for conductive hearing loss.
Noise-induced hearing loss (NIHL) typically manifests as elevated hearing thresholds (i.e. less sensitivity or muting) between 3000 and 6000 Hz, centred at 4000 Hz. As noise damage progresses, damage spreads to affect lower and higher frequencies. On an audiogram, the resulting configuration has a distinctive notch, called a 'noise' notch. As ...
There is a transition between these two areas described. Factor A is a problem only in low noise levels, whereas Factor D is a problem when the noise level is high. Hearing impairment (based on the audiogram) and auditory handicap (based on speech discrimination in noise) data was reviewed by Reinier Plomp [who?]. This led to the formulation of ...
The shape of an audiogram shows the relative configuration of the hearing loss, such as a Carhart notch for otosclerosis, 'noise' notch for noise-induced damage, high frequency rolloff for presbycusis, or a flat audiogram for conductive hearing loss.
Most people living in modern society have some degree of progressive sensorineural (i.e. permanent) noise-induced hearing loss (NIHL) resulting from overloading and damaging the sensory or neural apparatus of hearing in the inner ear. [citation needed] NIHL is typically a drop-out or notch centered at 4000 Hz. Both intensity (SPL) and duration ...