The Effects of Physiological Noise on the Auditory Threshold

1972 ◽  
Vol 15 (4) ◽  
pp. 837-844 ◽  
Author(s):  
Linda K. Moulin
Keyword(s):  
Psychometric Function ◽  
Middle Ear ◽  
External Auditory Canal ◽  
False Positive ◽  
Normal Group ◽  
Auditory Threshold ◽  
Physiological Noise ◽  
Threshold Determination ◽  
Interpretation Of Results

Psychometric function slopes and false positive rates were obtained from two groups of 10 subjects each: a normal group observed both with and without external auditory canal occlusion, and a group of subjects with otosclerotic hearing losses. The measures were obtained at 80, 125, and 1000 Hz. Analysis of subject responses revealed that steeper psychometric function slopes and fewer false positive responses were observed in the otosclerotic group as compared with the normal group. Interpretation of results supports a model of auditory functioning in which a substantial amount of physiological noise originates in the middle ear and creates confusion, uncertainty, and variability during threshold determination for normal listeners. This variability, reflected in a flattening of the psychometric function slope and an increase in occurrence of false positive responses, is not seen in subjects with otosclerosis, presumably because of attenuation of physiological noise arising in the middle ear.

The Effects of Positive and Negative Middle Ear Pressures on Auditory Threshold

2006 ◽  
Vol 27 (5) ◽  
pp. 734-738 ◽  
Author(s):  
Petia Petrova ◽  
Sharon Freeman ◽  
Haim Sohmer
Keyword(s):  
Middle Ear ◽  
Auditory Threshold

scholarly journals Late Presentation of Idiopathic Tympanic Membrane Ossification with External Auditory Canal Stenosis

2015 ◽  
Vol 7 (3) ◽  
pp. 141-143
Author(s):  
Hitesh Verma
Keyword(s):  
Tympanic Membrane ◽  
Middle Ear ◽  
External Auditory Canal ◽  
Special Form ◽  
Rare Case ◽  
Late Presentation ◽  
Canal Stenosis ◽  
Middle Ear Cleft

ABSTRACT The external auditory canal (EAC) is formed by lateral cartilaginous and medial bony part. The stenosis of EAC is narrowing of the width of the EAC, i.e. either caused by congenital or acquired causes. Myringosclerosis is a condition caused by calcification of tissues in the tympanic membrane and ossification is a special form of fibrosis due to the long-term, irreversible continued inflammation in the middle ear cleft. We are presenting rare case of idiopathic tympanic membrane ossification with generalized stenosis of EAC in 29-year-old patient. How to cite this article Verma H, Dass A, Singhal SK, Gupta N. Late Presentation of Idiopathic Tympanic Membrane Ossification with External Auditory Canal Stenosis. Int J Otorhinolaryngol Clin 2015;7(3):141-143.

scholarly journals A child’s mysterious ear

2021 ◽  
Vol 7 (9) ◽  
pp. 1555
Author(s):  
Preeti Shetti ◽  
Shivani Gupta ◽  
Paramita Debnath
Keyword(s):  
Foreign Body ◽  
Middle Ear ◽  
External Auditory Canal ◽  
Pediatric Patients ◽  
Middle Ear Mucosa ◽  
Polypoidal Mass

<p>Foreign body in ear is an emergency encountered by an otolaryngologist and if not removed it can lead to serious complications. Most commonly foreign body in ear is lodged in external auditory canal while it’s rare to find it in middle ear. We report a case of foreign body in the middle ear in a 3-year-old child who presented to us with chronic discharging ear who was then suspected to be unsafe ear and so was taken up for exploration under microscope. A pink polypoidal mass arising from middle ear mucosa was found and following its removal- to our surprise; a blackish rubbery debris filling the middle ear cavity and attic area along with embedded foreign body was extracted. We conclude that pediatric patients with chronic ear discharge not responding to antibiotics should raise a suspicion of FB in the middle ear and explored timely.</p>

scholarly journals First branchial cleft cyst accompanied by external auditory canal atresia and middle ear malformation: A case report

2020 ◽  
Vol 8 (16) ◽  
pp. 3616-3620
Author(s):  
Chun-Lin Zhang ◽  
Chun-Lei Li ◽  
Hang-Qi Chen ◽  
Qiang Sun ◽  
Zhao-Hui Liu
Keyword(s):  
Case Report ◽  
Middle Ear ◽  
External Auditory Canal ◽  
Branchial Cleft Cyst ◽  
Branchial Cleft ◽  
Canal Atresia

Does tranexamic acid improve intra-operative visualisation in endoscopic ear surgery? A double-blind, randomised, controlled trial

2019 ◽  
Vol 133 (12) ◽  
pp. 1033-1037 ◽  
Author(s):  
A Das ◽  
S Mitra ◽  
D Ghosh ◽  
S Kumar ◽  
A Sengupta
Keyword(s):  
Tranexamic Acid ◽  
Middle Ear ◽  
External Auditory Canal ◽  
Soft Tissues ◽  
Controlled Trial ◽  
Control Group ◽  
Endoscopic Ear Surgery ◽  
Ear Surgery ◽  
Significant Difference ◽  
Surgical Field

AbstractObjectiveTo assess the effect of tranexamic acid on intra-operative bleeding and surgical field visualisation.MethodsFifty patients undergoing various endoscopic ear surgical procedures, including endoscopic tympanoplasty, endoscopic atticotomy or mastoidectomy, endoscopic ossiculoplasty, and endoscopic stapedotomy, were randomly assigned to: a study group that received tranexamic acid or a control group which received normal saline. The intra-operative bleeding and operative field visualisation was graded using the Das and Mitra endoscopic ear surgery bleeding and field visibility score, which was separately analysed for the external auditory canal and the middle ear.ResultsThe Das and Mitra score was better (p < 0.05) in the group that received tranexamic acid as a haemostat when working in the external auditory canal; with respect to the middle ear, no statistically significant difference was found between the two agents. Mean values for mean arterial pressure, heart rate and surgical time were comparable in both groups, with no statistically significant differences.ConclusionTranexamic acid appears to be an effective haemostat in endoscopic ear surgery, thus improving surgical field visualisation, especially during manipulation of the external auditory canal soft tissues.

scholarly journals Amyloidosis of the External Auditory Canal and Middle Ear: Unusual Ear Tumor

2007 ◽  
Vol 86 (2) ◽  
pp. 92-106 ◽  
Author(s):  
Heitham Gheriani ◽  
Rajesh Tewary ◽  
Timothy J. O'Sullivan
Keyword(s):  
Middle Ear ◽  
External Auditory Canal
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