Exam 1: Review Session Flashcards
According to The American National Standard Institute, the basic test parameters for an electroacoustic check of a hearing aid (i.e., quality control of HA) include:
- gain
- compression characteristics (attack and release times)
- maximum power output, that is, OSPL90.
to make sounds comfortably loud with HA
Desired sensation level
the range of intensities from the softest sounds we can hear to the loudest sounds we can tolerate
dynamic range (window of hearing)
spongy bone in which spiral ganglion cells and the cochlear nerve are situated
Modiolus
Area difference from the tympanic membrane to the stapes footplate compensates the impedance mismatch about ____ dB
25 dB
The vibratory wave-motion of the basilar membrane is a ______ wave.
traveling
Aim to maximize speech intelligibility for clients
National acoustic laboratory Nonlinear 1 and 2 procedures
n order for frequencies below 100 Hz to be heard, the basilar membrane theoretically should have ____ stiffness and _____ mass
low
large
The buckling of the Umbo compensates for the impedance mismatch of about ___ dB
6 dB
Where is the telecoil found?
inside the HA
Advantages of this type of hearing aid are durable, longer battery, better for kids, high gain
Disadvantages are noise and/or wind
BTE
The ossicles react like a lever system, compensating the impedance mismatch about ____ dB
2.3 dB
One of the functions of the primary auditory cortex is to retain functional ______
plasticity
The output level of the hearing aids when 90 dB SLP (relatively loud sound) is presented to the hearing aid when hearing gain control is full to check if HA can generate any distorted sounds.
OSPL90
The tip links play a crucial role in the transduction of the movement of the stereocilia into neural activities that take place in the cells in the what organ?
Organ of Corti
You can only measure resting potential when the external stimulus is _______
absent
The stria vascularis provides the oxygen required for the basic ______ _______ of the cochlea.
metabolic control
What is “predominantly” used by the auditory system to encode frequency information?
Place theory or topographical organization
This is designed specifically to assist in telephone communication
telecoil
time a HA takes to put less gain when input level is already high
Attack time
First structure to receive information
superior SOC, then IC
time a HA takes to put prescribed gain when input level is soft.
release time
The primary structure for processing interaural time and level differences is the ?
superior olivary complex (SOC)
Which hemisphere receives better frequency information if the left ear is the better hearing ear?
As the left ear is a better ear, majority of neural information will travel to the opposite side of brain (right hemisphere).
Structure that helps to process time information?
Lateral leminscus
What defines amplitude coding?
- discharging rates of nerve fibers
- the number of related neural nerves (neurons) stimulated along the basilar membrane
- the number of nerve fibers (axons) involved in the information transmission
One of the functions of the middle ear is to compensate ______ ________
impedance mismatchin
What is a disadvantage of ITE/ITC hearing aids?
acoustic feedback
This converts mechanical energy to electrochemical (i.e., neural) energy.
cochlea
Most common fitting procedures
National acoustic laboratory Nonlinear 1 and 2 procedures
