Physiology of Hearing and Audiology - Free MCQ Practice Test with solutions,

Sound travels from the pinna through the External Auditory Canal (EAC) to the Tympanic Membrane (TM). This pathway is crucial for proper sound transmission to the inner ear components.

A defect in the organ of Corti leads to sensorineural hearing loss, which affects the sensory and neural pathways critical for hearing.

Mixed hearing loss occurs when there are defects in both the conductive and sensorineural pathways, affecting overall hearing ability.

The middle ear amplifies sound intensity as it transitions from the lower impedance of air to the higher impedance of the inner ear, facilitating effective sound transmission.

The Areal Ratio of 17:1 refers to the effective vibrating area of the tympanic membrane (55 mm²) relative to the footplate of the stapes (3.2 mm²), indicating how sound force is amplified.

Rinne's test compares air conduction (AC) and bone conduction (BC) in the same ear to determine the type of hearing loss present.

In conductive hearing loss, sound lateralizes to the worse ear due to the interference of ambient noise in the normal ear.

A positive Rinne test indicates that air conduction (AC) is better than bone conduction (BC), which is normal or suggests sensorineural deafness.

Tympanometry evaluates the middle ear's condition by measuring the impedance to sound energy as pressure changes in the external auditory canal.

The presence of a stapedial reflex indicates that the auditory pathway, including the afferent and efferent pathways, is functioning correctly.

The Absolute Bone Conduction (ABC) test evaluates bone conduction specifically to diagnose sensorineural hearing loss.

Pure Tone Audiometry (PTA) typically tests air conduction from 125 Hz to 8000 Hz to assess hearing ability across a range of frequencies.

An audiogram visually represents the hearing thresholds for each ear, using symbols to indicate normal and abnormal hearing levels.

Masking is used to ensure that the better ear does not participate in the hearing test, allowing accurate assessment of the worse ear's hearing ability.

A Bing test result indicating that the sound is louder when the ear is blocked suggests normal hearing or sensorineural deafness, as the background noise is reduced.