The external ear (pinna and earcanal) plays a major role in transforming acoustic signals from free field to the tympanic membrane in humans. It acts as a filter to reduce low frequencies, a resonator to enhance mid frequencies (2.0 to 7.0 kHz), and a direction-dependent filter at high frequencies to augment spatial perception. The external ear transfer function is altered by variations in the ...

myiasis is the invasion of body tissues of humans and animals by the larvae of the diptera or two-winged flies. there are only sporadic reports in the literature concerning human ear myiasis. a 62-year-old bedridden woman in an intensive care unit was examined because of her intense swollen and erythematous right ear. physical examination revealed 80 live larvae (maggots) in the posterior part ...

The acoustic transfer functions of external ears with or without headphones affect the features of perceived sounds and vary considerably with listeners and headphones. A method for estimating the frequency responses of external-ear transfer functions from the sound at the entrance of a blocked ear canal (or from the input of a headphone) to the sound at the eardrum for different listeners and ...

We report a case of middle ear adenoma (neuroendocrine adenoma of the middle ear) protruding into the external ear canal. The patient was a 65-year-old man with hearing alterations and a headache in whom an otoscopy disclosed a sessile, pea-sized, brown-reddish, focally bleeding mass located in the posterior-superior aspect of the right external auditory canal. Histopathologically, there was a ...

Anthropologists are commonly believed that characteristics and the shapes of the human external ear are extensively different. The objective of this study is to explore the potential of anthropometric data from external ear in individualization of monozygotic twin which also known as identical twin. Data of external ear features using 16 landmarks along with the measurements of inter-landmark l...