IHS Final Study Guide Questions with Verified Solutions

IHS Final Study Guide Questions with Verified Solutions The fleshy part of the ear that protrudes from the side of the head is called the Auricle or Pinna The average adults canal is about _____ inch in length and about _____ inch in diameter 1 and 1⁄4 The cone of light is a reflection of the light from an otoscope on the tympanic membrane The external auditory canal's resonant frequency is about 2700hz and varies slightly from person to person The structure of the tympanic membrane is made up of 3 layers The transduction of energy as acoustical sound courses through the middle ear which is as follows Acoustical energy is changed into mechanical energy at the tympanic membrane and changed into hydraulic energy at the stapes footplate The promontory is located on the medial wall of the middle ear It represents the basal turn of the cochlea Otitis media is an ear infection that may result from Eustachian tube dysfunction Fluid in the middle ear is also called effusion Otosclerosis immobilizes the ossicles at the stapes footplate The cochlea in located with the petrous portion of the temporal bone. It coils in about 2 1⁄2 turns. Uncoiled it measures about 1 inch Three chambers within the inner ear are called scala vestibuli, scala media, scala tympani The basilar membrane and the reissner's membrane separate the cochlea into three chambers. The organ of Corti is the sensory receptor for hearing The hair cells activate the auditory nerve through electrochemical energy The Place Theory of Hearing is simply explained as the basal turn of the cochlea responds to high frequencies and the apical turn of the cochlea responds to low The singular perception of two different signals presented to each ear simultaneously is binaural fusion An octave is the doubling of a frequency