How Well Does the Larynx “Canal” Match the Ear Canal?

2021 ◽  
Vol 78 (3) ◽  
pp. 359-361
Author(s):  
Ingo Titze ◽  
Brad Story
Keyword(s):  
Ear Canal

Anatomical Study of the Modified Glasscock Approach with a Temporary Removal of the Bony Ear Canal

Skull Base ◽  
2007 ◽  
Vol 17 (S 1) ◽  
Author(s):  
H. Kunst ◽  
J. Lavieille ◽  
A. Devèze ◽  
K. Graamans ◽  
J. Magnan
Keyword(s):  
Anatomical Study ◽  
Ear Canal

Rhabdomyosarcoma of the External Ear Canal Treated with Brachytherapy

2016 ◽  
Vol 2016 (1) ◽  
Author(s):  
Mahvish Qureshi MD ◽  
◽  
Sana Farooki MD ◽  
Chibuzo O’Suoji MD ◽  
◽  
...  
Keyword(s):  
External Ear ◽  
Ear Canal ◽  
External Ear Canal

scholarly journals Is Biofeedback through an Intra-Aural Device an Effective Method to Treat Bruxism? Case Series and Initial Experience

2020 ◽  
Vol 18 (1) ◽  
pp. 51
Author(s):  
Kira Pfeiffer ◽  
Thaqif El Khassawna ◽  
Deeksha Malhan ◽  
Christine Langer ◽  
Barbara Sommer ◽  
...  
Keyword(s):  
Clinical Evidence ◽  
Positive Impact ◽  
Case Series ◽  
Physiological Status ◽  
Initial Experience ◽  
Ear Canal ◽  
Number Of Patients ◽  
Patient Reported ◽  
Unpleasant Feeling ◽  
Ear Canals

Biofeedback was reported as an effective concept for bruxism treatment, through increasing patient’s awareness of the habit. During bruxing both ear canals become tighter, therefore, an in-ear device can provide biofeedback. The in-ear device is fitted to the ear canal in physiological status, during bruxing the ear-canal tightens resulting in stress on the canal walls and unpleasant feeling. Subsequently, patients stop their bruxing habit. The aim of this study is to provide first clinical evidence that in-ear devices have a positive impact on relieving bruxism in patients. Despite the low number of patients, this early study was designed as a controlled prospective study. The trial included seven female patients with a median age of 47.3 years (23–64 years). Only two patients implemented their devices for eight and seven months, respectively. One patient reported a relief in her symptoms, like headaches and pain intensity during the night, by 50% after three month and 80% after six months. Despite the limited number of participants, the study reflects a potential of Intra-aural devices as effective biofeedback devices in treating bruxism.

scholarly journals Review of Bone Conduction Hearing Devices

2021 ◽  
Vol 11 (2) ◽  
pp. 207-219
Author(s):  
Susan E. Ellsperman ◽  
Emily M. Nairn ◽  
Emily Z. Stucken
Keyword(s):  
Hearing Aid ◽  
Bone Conduction ◽  
Sound Transmission ◽  
Ear Canal ◽  
Hearing Devices ◽  
Bone Conduction Hearing ◽  
Single Sided Deafness

Bone conduction is an efficient pathway of sound transmission which can be harnessed to provide hearing amplification. Bone conduction hearing devices may be indicated when ear canal pathology precludes the use of a conventional hearing aid, as well as in cases of single-sided deafness. Several different technologies exist which transmit sound via bone conduction. Here, we will review the physiology of bone conduction, the indications for bone conduction amplification, and the specifics of currently available devices.

Voice In Ear

2021 ◽  
Vol 5 (1) ◽  
pp. 1-25
Author(s):  
Yang Gao ◽  
Yincheng Jin ◽  
Jagmohan Chauhan ◽  
Seokmin Choi ◽  
Jiyang Li ◽  
...  
Keyword(s):  
User Authentication ◽  
Low Cost ◽  
The Body ◽  
Ear Canal ◽  
Replay Attacks ◽  
Increasing Demand ◽  
The Right ◽  
Sound Conduction ◽  
Enrollment Data ◽  
Secure Authentication

With the rapid growth of wearable computing and increasing demand for mobile authentication scenarios, voiceprint-based authentication has become one of the prevalent technologies and has already presented tremendous potentials to the public. However, it is vulnerable to voice spoofing attacks (e.g., replay attacks and synthetic voice attacks). To address this threat, we propose a new biometric authentication approach, named EarPrint, which aims to extend voiceprint and build a hidden and secure user authentication scheme on earphones. EarPrint builds on the speaking-induced body sound transmission from the throat to the ear canal, i.e., different users will have different body sound conduction patterns on both sides of ears. As the first exploratory study, extensive experiments on 23 subjects show the EarPrint is robust against ambient noises and body motions. EarPrint achieves an Equal Error Rate (EER) of 3.64% with 75 seconds enrollment data. We also evaluate the resilience of EarPrint against replay attacks. A major contribution of EarPrint is that it leverages two-level uniqueness, including the body sound conduction from the throat to the ear canal and the body asymmetry between the left and the right ears, taking advantage of earphones' paring form-factor. Compared with other mobile and wearable biometric modalities, EarPrint is a low-cost, accurate, and secure authentication solution for earphone users.

Prevalence of external ear disorders in Belgian stray cats

2017 ◽  
Vol 20 (2) ◽  
pp. 149-154 ◽  
Author(s):  
Anouck Bollez ◽  
Hilde de Rooster ◽  
Alessandra Furcas ◽  
Sophie Vandenabeele
Keyword(s):  
Body Condition ◽  
Otitis Externa ◽  
Body Condition Score ◽  
External Ear ◽  
Ear Canal ◽  
Malassezia Species ◽  
External Ear Canal ◽  
Stray Cats ◽  
Condition Score ◽  
Ocular Discharge

Objectives Feline otitis externa is a multifactorial dermatological disorder about which very little is known. The objective of this study was to map the prevalence of external ear canal disorders and the pathogens causing otitis externa in stray cats roaming around the region of Ghent, Belgium. Methods One hundred and thirty stray cats were randomly selected during a local trap–neuter–return programme. All cats were European Shorthairs. This study included clinical, otoscopic and cytological evaluation of both external ears of each cat. Prospective data used as parameters in this study included the sex, age and body condition score of each cat, as well as the presence of nasal and/or ocular discharge, and the results of feline immunodeficiency virus (FIV) and feline leukaemia virus (FeLV) Snap tests. Results Remarkably, very few (sub)clinical problems of the external ear canal were found in the stray cat population. Malassezia species was by far the most common organism found in the external ear canals of the 130 stray cats. A total of 96/130 (74%) cats were found to have Malassezia species organisms present in one or both ears based on the cytological examination. No correlation was found between the parameters of sex, age, body condition score, the presence of nasal and/or ocular discharge and FIV and FeLV status, and the presence of parasites, bacteria or yeasts. Conclusions and relevance This study provides more information about the normal state of the external ear canal of stray cats. The ears of most stray cats are relatively healthy. The presence of Malassezia species organisms in the external ear canal is not rare among stray cats.

Distortion product otoacoustic emissions upon ear canal pressurization

2013 ◽  
Vol 133 (4) ◽  
pp. EL331-EL337 ◽  
Author(s):  
Makram Zebian ◽  
Volker Schirkonyer ◽  
Johannes Hensel ◽  
Sven Vollbort ◽  
Thomas Fedtke ◽  
...  
Keyword(s):  
Otoacoustic Emissions ◽  
Distortion Product Otoacoustic Emissions ◽  
Ear Canal ◽  
Distortion Product

scholarly journals Mass in the ear canal

2003 ◽  
Vol 79 (>931) ◽  
pp. 300-300 ◽  
Author(s):  
S Ghosh
Keyword(s):  
Ear Canal

scholarly journals Hydromechanical Structure of the Cochlea Supports the Backward Traveling Wave in the Cochlea In Vivo

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
Fangyi Chen ◽  
Dingjun Zha ◽  
Xiaojie Yang ◽  
Allyn Hubbard ◽  
Alfred Nuttall
Keyword(s):  
Traveling Wave ◽  
Basilar Membrane ◽  
Wave Theory ◽  
Otoacoustic Emission ◽  
Traditional Theory ◽  
Vibration Source ◽  
Ear Canal ◽  
Local Vibration ◽  
Membrane Vibration

The discovery that an apparent forward-propagating otoacoustic emission (OAE) induced basilar membrane vibration has created a serious debate in the field of cochlear mechanics. The traditional theory predicts that OAE will propagate to the ear canal via a backward traveling wave on the basilar membrane, while the opponent theory proposed that the OAE will reach the ear canal via a compression wave. Although accepted by most people, the basic phenomenon of the backward traveling wave theory has not been experimentally demonstrated. In this study, for the first time, we showed the backward traveling wave by measuring the phase spectra of the basilar membrane vibration at multiple longitudinal locations of the basal turn of the cochlea. A local vibration source with a unique and precise location on the cochlear partition was created to avoid the ambiguity of the vibration source in most previous studies. We also measured the vibration pattern at different places of a mechanical cochlear model. A slow backward traveling wave pattern was demonstrated by the time-domain sequence of the measured data. In addition to the wave propagation study, a transmission line mathematical model was used to interpret why no tonotopicity was observed in the backward traveling wave.

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