Ear Anatomy
Ossicles, tympanic cavity, and eustachian tube make up this section
What is:
The Middle ear
Sound waves canNOT travel through this medium
What is:
a vacuum
After gathering patient history and performing otoscopy, you determine to move forward with audiometric testing.
The first test you will conduct is
What is
Pure tone air conduction
This "C" can only be determined and referred once audiometric testing has been completed
What is:
Conductive component
AB Gap more than 15db
These outdated style aid provides more power due to the longer distance between microphone and receiver
What is:
Body Aid
The outer rim of the auricle is the:
What is:
the helix
The speed of sound waves in air, at sea level is
What is:
347 meters/sec
770 mph
~1,100 ft/sec
In bone conduction testing, the oscillator should be placed on this, of the testing ear
What is:
the mastoid process
This "D" might include atresia, partial collapse, very narrow canals, etc.
What is:
Deformity, visible of the outer ear
This custom molded, hidden aid allows for natural full auricle effect and requires less amplification due to closer proximity to the tympanic membrane
What is:
CIC- Completely in canal
The main purpose of the semi-circular canals are to provide the ability to sense this
What is:
Rotational movement in any direction
A basic sound wave is an example of this type of wave
What is:
Mechanical wave
linear wave
Masking is necessary in AC testing when there is a difference of this much between ears
What is:
40dB
"U" can be determined through patient description and describes HL in only one ear
What is:
Unilateral loss or monaural
This discreet aid uses a behind the ear component and micro-tubing. The receiver is located within the dome that is inserted into the ear
What is:
RIC- receiver in canal
This feature delineates the middle ear from the inner ear
What is:
the oval window
This measurement of a sound wave is taken between 2 points of maxiumum compression and is considered to be 1 cycle
What is:
wavelength
SRT is an acronym for this test that dictates 2 syllable spondee words to the patient
What is:
Speech Recognition Threshold
"D" might suggest a vestibular issue
What is:
Dizziness
This hearing aid fits within the concha and has the advantage of canal level microphones
What is:
ITE- In the ear
The diameter of this feature is said to about that of an ordinary #2 pencil
What is:
the external auditory canal
(EAC, ear canal)
In what order, from fastest to slowest, do sound waves travel though 3 most common mediums
What is:
Steel (solid), water (liquid), air (gas)
These type of words are dictated at the patient's MCL, usually in a list of 50 words, each with 2% weight in score
What are:
Phonetically Balanced words (PBs)
"P" would be reported per patient and followed up with visual inspection to look for signs of infection
What is:
Pain
These 2 types of aids help with sound localization for a person with asymmetrical losses in each ear
What are:
CROS & BiCROS