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Pure-tone audiometry is the main hearing test used to identify hearing threshold levels of an individual, enabling determination of the degree, type and configuration of a hearing loss [1] [2] and thus providing a basis for diagnosis and management.
Panthera is a genus within the family Felidae, and one of two extant genera in the subfamily Pantherinae.It contains the largest living members of the cat family. There are five living species: the jaguar, leopard, lion, snow leopard and tiger, as well as a number of extinct species, including the cave lion and American lion.
The members of the Panthera genus are classified as some level of threatened by the IUCN Red List: the lion, [28] leopard [5] and snow leopard [29] are categorized as Vulnerable; the tiger is listed as Endangered; [30] and the jaguar is listed as Near Threatened. [31] Cheetahs are also classified as Vulnerable, [32] and the cougar is of Least ...
Through these, the perception of a physical stimulus (sound) and our psychological response to the sound is measured. [9] Several psychophysical methods can measure absolute threshold. These vary, but certain aspects are identical. Firstly, the test defines the stimulus and specifies the manner in which the subject should respond.
Sound production is facilitated by the low threshold pressure required to oscillate the vocal folds, and low glottal resistance. [4] The rough-sounding quality of the low-pitched vocalizations is likely generated by the complex pattern of vocal vibrations, caused by the excitation of multiple modes of oscillation simultaneously. [ 4 ]
Audiometry (from Latin audīre 'to hear' and metria 'to measure') is a branch of audiology and the science of measuring hearing acuity for variations in sound intensity and pitch and for tonal purity, involving thresholds and differing frequencies. [1]
The Pantherinae is a subfamily of the Felidae; it was named and first described by Reginald Innes Pocock in 1917 as only including the Panthera species, [2] but later also came to include the clouded leopards (genus Neofelis).
The tiger (Panthera tigris) is a large cat and a member of the genus Panthera native to Asia. It has a powerful, muscular body with a large head and paws, a long tail and orange fur with black, mostly vertical stripes.