............................................................................................................................................. Introduction & Background ............................................................................................................. Methods of Previous Research..............................................................................................

Objective: To study the effect of age on auditory threshold shift among children in two schools for the deaf. Result: Pure tone audiogram showed 6-8 dB threshold shift in the metropolitan group of 234 children and 4 dB in the non-metropolitan group of 151 children. In metropolitan school one hundred and forty-seven (62.8%) were found to be hearing aid users and 42 (28%) were in non-metropolitan...

A 68 year old woman presented with bilateral sudden simultaneous hearing loss and transient spontaneous vertigo as a sole manifestation of vertebrobasilar insufficiency. Extensive investigation to exclude other causes was unremarkable. Magnetic resonance imaging of the brain, including diffusion images, showed no abnormalities. A magnetic resonance angiogram showed severe stenosis of the middle...

The audiograms of three big brown bats (Eptesicus fuscus) were determined using a conditioned avoidance procedure. The average audiogram ranged from 0.850 kHz at 106 dB to 120 kHz at 83 dB SPL, with a best threshold of 7 dB at 20 kHz and a distinct decrease in sensitivity at 45 kHz. The results confirm those of a previous study by Dalland (1965a) that the big brown bat has good high-frequency h...

The audiograms of three Japanese macaques and seven humans were determined in a free-field environment using loudspeakers. The monkeys and humans were tested using tones ranging from 8 Hz to 40 kHz and 4 Hz to 22.4 kHz, respectively. At a level of 60 dB sound pressure level the monkeys were able to hear tones extending from 28 Hz to 37 kHz with their best sensitivity of 1 dB occurring at 4 kHz....

When conventional behavioural audiometry is difficult or impossible, or when its results are inaccurate or suspect, there is a need for more objective hearing tests. Candidates for such tests include young infants, uncooperative, hyperactive, or neurologically impaired children, and those suspected of non-organic hearing loss. The usual goal is to approximate pure tone thresholds, using some me...

In this case report, we discuss a patient who presented with Tullio’s phenomenon, also experienced bone-conduction induced seizures on two occasions. phenomenon refers to sound vestibular symptoms, including disequilibrium oscillopsia, and vertical nystagmus. We were ultimately able rule out some of the more common pathologies associated for based imaging findings. However, given specific natur...