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Hearing tests. Principles of hearing. Air-conduction Bone-conduction. Why do we test hearing. To detect one of major hearing impairment Senzorineural (perception) Conductive. Speech test Loud Whisper Tuning fork test Weber Rinne Bing Schwabach Audiometry Objective Subjective.

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principles of hearing
Principles of hearing

Air-conduction Bone-conduction

why do we test hearing
Why do we test hearing
  • To detect one of major hearing impairment
    • Senzorineural (perception)
    • Conductive
slide4

Speech test

    • Loud
    • Whisper
  • Tuningfork test
    • Weber
    • Rinne
    • Bing
    • Schwabach
  • Audiometry
    • Objective
    • Subjective
speech test
Speech test
  • App. 5 meter distance
  • Eachearmustbe test separately
  • Patient should repeat 5 words whispered by the doctor, 5 words told loudly
    • High-frequency words (silence, similarly, sitting)
    • Low-frequency words (drum, button)

Results: lost of high frequencies – perception disease (f.e.presbyacusis)

low frequencies – conductive disease (f.e. otitis media)

tuning fork tests
Tuning fork tests

these allow one to distinguish (much more clearly) betweenconductive and sensorineural deafness

weber s test
Weber´s test
  • tuning fork is placed on the patient's forehead (or in the middle line)
  • If the sound lateralizes (is louder on one side than the other), the patient may have either an ipsilateral conductive hearing loss or a contralateral sensorineural hearing loss
rinne s test
Rinne´s test
  • comparison is made between bone and air conduction
  • base of a tuning fork is placed to the mastoid area (bone), and then after the sound is no longer appreciated, the vibrating top is placed near the external ear canal (air)
  • positive Rinne – healthly or perceptive disease
  • negative – conductive disease
bing test
Bing test
  • fork is struck and placed on the patient's mastoid tip
  • examiner alternately occludes the patient's external meatus
  • patient withnormal hearing or a sensorineural loss, he or she will notice a change in intensity with occlusion
  • patient with conductive hearing loss, he or she will notice no change
schwabach s test
Schwabach´s test
  • compares the patient's bone conduction to that of the examiner's
  • If the patient stops hearing before the examiner, this suggests a sensorineural loss
  • If the patient hears it longer than the examiner, this suggests a conductive loss

This test is contingent on the examiner having normal hearing..

slide11

And audiometry…

  • Subjective (needs patient verbal response)
  • Objective (combination wit EEG)
hearing abnormalities and audiometry
Hearing abnormalities and audiometry

Senzorineural impairment Conductive disease