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Audiogram notches in noise-exposed workers
https://pubmed.ncbi.nlm.nih.gov/17086083/
Objectives: Diagnostic criteria for noise-induced hearing loss include the audiometric notch, yet no standardized definition exists. This study tested whether objective notch metrics could match the clinical judgments of an expert panel. Design: A panel of occupational physicians, otolaryngologists, and audiologists reviewed audiograms of noise-exposed workers.
Notched Audiograms and Noise Exposure History in …
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2811687/
This may be reflected in the audiogram as hearing thresholds that reach a maximum between 3–6 kHz and then return toward the normal level at higher frequencies, forming a noise notch. A notched audiogram, together with a positive history of noise exposure, has been gradually accepted as a clinical sign of NIHL (McBride & Williams, 2001).
Is the Carhart notch a predictive factor of hearing ...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7982757/
The Carhart notch (CN) is a depression in the bone-conduction audiogram of patients with clinical otosclerosis. The middle frequencies from 0.5 to 2 kHz, which correspond to the resonance frequency of the middle ear, can be substantially improved upon following successful stapes surgery.
What is the Carhart notch in Pure Tone Audiometry?
https://www.interacoustics.com/us/academy/faq/audiometry/what-is-the-carhart-notch-in-pure-tone-audiometry
This effect arises across the frequency range and is related to the resonance properties of the ossicular chain. The result is a “notch” in the bone conduction audiogram which is more pronounced at 2 kHz as described by Carhart in 1950. Carhart, R. (1950) Clinical application of bone conduction audiometry.
Abnormal Audiograms in Ear Pathology
https://entpa.org/resources/Pictures/2016%20ENT%20for%20the%20PA-C/Presentations/Abnormal%20audiograms%20in%20ear%20pathology%20-%20Klingenberg.pdf
– Describe the audiogram by configuration from least amount of hearing loss to the most (ex: mild to severe) ... – Repeated exposure causes irreversible loss‐characteristic notch around 3‐4 …
Why does Carhart's Notch occur?
https://findanyanswer.com/why-does-carharts-notch-occur
The Carhart notch is a depression in the bone-conduction audiogram of patients with clinical otosclerosis. The middle frequencies from 0.5 to 2 kHz, which correspond to the resonance frequency of the middle ear, can be substantially …
Carhart’s notch – Ent Scholar
https://entscholar.wordpress.com/article/carharts-notch/
Carhart’s notch. Introduction: This is seen in bone conduction audiograms of patients with otosclerosis 1. This is a dip at 2000 Hz in the bone conduction audiograms of these patients. Some authors consider this to be an artifact. After stapes surgery there is demonstrable over closure of air bone gap.
Five Myths in Assessing the Effects of Noise on Hearing ...
https://www.audiologyonline.com/articles/five-myths-in-assessing-effects-1292
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