What is the pathway of sound from the pinna to the auditory cortex?

Sound travels through several structures.

• Starts at the pinna.

• Affects tympanic membrane.

• Ends in auditory cortex.

True or False: Mixed hearing loss occurs when there are defects in both the conductive and sensorineural pathways.

True

Fill in the blank: The effective vibrating area of the tympanic membrane is ______ mm².

55

Which test compares air conduction and bone conduction in the same ear?

Rinne's test

Riddle: I help amplify sound and can be negatively affected by blockage, but I’m not a person. What am I?

The tympanic membrane

What is the ratio known as when sound is focused from the tympanic membrane to the footplate of the stapes?

Areal Ratio (17:1)

True or False: The stapedial reflex is a unilateral reflex that only occurs in the ear that hears the sound.

False. The stapedial reflex is a bilateral reflex.

In Schwabach's test, if the patient's bone conduction is longer than the examiner's, this indicates ______.

Conductive hearing loss

What is the primary purpose of the Bing test?

To assess differences in sound perception when the ear canal is open versus blocked.

Fill in the blank: The absence of Otoacoustic Emissions (OAEs) may indicate potential ______.

Cochlear lesions

Which audiometric test is used to measure the electrical activity in the auditory pathway within the brainstem?

Brainstem Evoked Response Audiometry (BERA)

True or False: High-frequency audiometry tests frequencies from 20 Hz to 20,000 Hz.

False. High-frequency audiometry tests frequencies from 8000 Hz to 20,000 Hz.

What is the formula for calculating percentage hearing loss based on average hearing thresholds?

Multiply the adjusted average threshold by 1.5.

Riddle: I am the test that measures your ability to hear and understand spoken words, but I’m not a person. What am I?

Speech audiometry

Fill in the blank: A normal air conduction threshold is considered up to ______ dB.

15

What condition is indicated by a negative Rinne test?

Conductive deafness

What is the significance of the acoustic reflex?

It protects the inner ear from loud sounds by reducing stapes movement.

True or False: Impedance audiometry can assess middle ear function by measuring sound resistance as pressure varies.

True

What is the primary clinical use of the Absolute Bone Conduction (ABC) test?

To evaluate bone conduction related to sensorineural deafness.

Riddle: I help differentiate between cochlear and retrocochlear hearing losses, but I’m not a doctor. What am I?

BERA (Brainstem Evoked Response Audiometry)

Fill in the blank: The tympanogram indicates Type C pattern due to ______.

Negative middle ear pressure

What does a SISI score of 70–100% suggest?

A cochlear lesion

True or False: The presence of spontaneous Otoacoustic Emissions indicates cochlear dysfunction.

False. It indicates normal cochlear function.

What is the typical threshold for the stapedial reflex to activate?

70 to 100 dB above the pure tone hearing threshold.

Fill in the blank: The acoustic reflex decay test can suggest ______ when the reflex amplitude decreases rapidly.

Retrocochlear problems

What is the role of the outer hair cells in Otoacoustic Emissions?

They produce sounds that can be detected and recorded.

In which type of hearing loss does the Weber test lateralize to the better ear?

Sensorineural hearing loss

Fill in the blank: The presence of recruitment typically indicates ______ hearing loss.

Cochlear

What does a flat tympanogram indicate?

Fluid accumulation in the middle ear.

Short Answer: How is the degree of handicap determined in cases of hearing impairment?

By considering the impairment in both ears.