In this paper, we examine how covering one or both external ears affects sound localization on the horizontal plane. In our experiments, we cover subjects’ pinnae and external auditory canals with headphones, earphones and earplugs, and conduct a sound localization test. The results indicate that front-back confusion rates increase when covering both external ears with open-air headphones, and ...

Causes and implications of sexual dimorphism have been studied in several different primates using a variety of morphological characters such as body weight, canine length, coat color and ornamentation. Here we describe a peculiar coat color characteristic in the squirrel monkey that is present only in adult females over five years old and which increases with age. Neither males nor young anima...

It has been our clinical impression that some patients suffering from recurring eczematoid dermatitis of the external auditory canal present hypersecretion of the glands of the ear canal (Shelley's observations confirmed this (1)). It was also a clinical impression that this secretion could be stimulated in the same manner as palmar (emotional) sweat. Many such patients volunteered the informat...

PURPOSE To determine CT findings in the external, middle, and inner ear of patients with microtia and external auditory canal dysplasia. METHODS We used high-resolution CT, with multiplanar or axial 1-mm continuous sections, coronal or sagittal reformations, or low-dose spiral acquisitions, to examine 184 temporal bones of children with microtia. RESULTS In cases of minor microtia, auditory...

We herewith report 2 patients with congenital aural stenosis who developed cholesteatoma related to the external ear canal (EEC) stenosis. One of the cases, had previously undergone craniotomy for intracranial complication of the disease, and also had postauricular fistula, whereas in the second patient it was silent and confined within the relatively enlarged stenotic ear canal in front of a r...

OBJECTIVES Otoplasty is a commonly performed surgical procedure that restores the ideal position of the pinna. Although the pinna is a well-recognized component of the auditory apparatus, no studies have assessed the audiological effects of this procedure. We sought to quantify the impact of pinna repositioning on speech intelligibility and reception. METHODS Eighteen adults with normal heari...

Acoustic waves interact with the human body, head and ears, before reaching the tympanic membranes in the ear canals. In this project we will develop an analytical method to calculate how these acoustic interactions occur. This is a highly nontrivial problem, because the acoustic wave equation (or, for harmonic waves, the Helmholtz equation) has to be solved on the complex geometry of the bound...

Absence of external auditory ear canal, or aural atresia is not a common condition in goats. The present study reports on a rare case of aural atresia with microtia in a kid. Genetic attributes have been made to microtia. Absence of external auditory ear canal with microtia in the present case is congenital as it was seen from birth.

Ceruminous adenoma, also called ceruminoma, ceruminal adenoma, apocrine adenoma, or even cylindroma in the past (the latter three terms are discouraged) is a benign glandular neoplasm of ceruminous glands (modified apocrine sweat glands) that arises solely from the external auditory canal. By definition, this tumor type cannot involve the auricular cartilages, ear lobe, or other such external e...

Clinical characteristics. Hereditary hearing loss and deafness may be conductive, sensorineural, or a combination of both; syndromic (associated with malformations of the external ear or other organs or with medical problems involving other organ systems) or nonsyndromic (no associated visible abnormalities of the external ear or any related medical problems); and prelingual (before language de...