Tympanometry is a clinical measurement routinely included in the assessment of middle ear function. Despite its widespread use, however, fundamental questions remain regarding the need for age-dependent normative data. This study examines normal developmental changes associated with four tympanometric measurements: (1) ear canal volume, (2) peak compensated acoustic admittance, (3) tympanometri...

Acupunture, a branch of Chinese traditional medicine, is believed to have originated in ancient China as early as before 2,000 B.C. (Veith, 1973). It now enjoys worldwide recognition and research in various aspects of acupuncture is presently being carried out in centres all over the world. Along with the growing use acupuncture among many physicians, new modalities were developed (Ling.Y. W., ...

The mustache bat emits a three-harmonic echolocation pulse. At the external ear, large interaural intensity differences are generated only when a sound originates within a limited area of two-dimensional space, and this area is different for each pulse harmonic. As a consequence, the external ear generates pronounced binaural spectral cues containing two-dimensional spatial information. This in...

The aim of this letter is to address a little understood question in sound source localization: Can the distance of a near sound source affect our own perception of its elevation? The issue is studied by means of an objective analysis of a database of distance-dependent head-related transfer functions (HRTFs) of a KEMAR (Knowles Electronic Manikin for Acoustic Research) mannequin with different...

P REVIOUS reports have given a description of the cyclic changes in excitability of both auricle and ventricle of the dog’s heart (I, 2). It was found that the dog’s auricle is ‘vulnerable’ to fibrillation throughout the major dip area of the excitability-recovery curve (3). A study of ventricular vulnerability has now been made. Cats and turtles were used almost exclusively in this investigati...

background: assisted reproductive techniques (art) are used with increasing frequency worldwide. the present research was conducted to determine the effects of art on hearing defects and ear abnormalities. materials and methods: n a descriptive, cross-sectional, non-randomized study, the status of hearing and ear abnormalities was assessed in 300 newborns conceived by art at royan institute, te...

Identifying and treating otitis media in pets is a challenging situation for the veterinarian, a frustrating event in the pet owner’s life, and a painful condition for the patient. When a veterinarian does not properly diagnose and treat otitis media, pet owners often seek second, third, and fourth opinions from neighbouring veterinary practices. The diagnosis of otitis media in dogs can be qui...

The use of headphone has been thought to cause infection in the ear canal and contribute to hearing loss. In this study, we examined 136 Customer Service Representative from Celcom (Malaysia) Sdn. Bhd. who use headphone throughout their working hours. The purpose of this study was to determine the prevalence of ear canal infection and other related diseases of the ear, nose and throat. Their he...

UNLABELLED Several studies involving immunohistochemical methods to assess external auditory canal epidermis have been performed with different objectives. With this method it is possible to assess the expression of various antigens such as cytokeratins, cytokines, and hyperproliferation markers among others. AIM to revise, describe and analyze the knowledge generated by identifiable papers p...