Audiometer and Test Environment Flashcards
audiometer requirements
- Frequency selection (500 to 6,000Hz)
- Intensity selection (-10dB to 90dB)
- Ear selection (L or R)
the three basic types of audiometers
manual
microprocessor
computer-controlled
the most conventional model
manual audiometer
advantages of manual audiometer
operator has full control
ability to focus on problem frequencies
disadvantages of manual audiometer
subject to human error
poor testing habits
shortcuts
“standalone” audiometer that uses a microchip controlled program
microprocessor audiometer
advantages of microprocessor audiometer
follows the standardized ANSI testing set
data is recorded and stored automatically
can identify problems during testing
disadvantages of microprocessor audiometer
subject to computer error
still need OHCs to review, validate test, & make decisions regarding disposition
connected to a computer and utilizes software to interface the audiometric equipment
used throughout DoD
computer-controlled
advantages of computer-controlled systems
can connect to single or multiple work stations
conducts one or several tests at once
reduced human error
disadvantages of computer-controlled systems
subject to computer errors
requires OHC review
manual override is needed
calibrated to the specific audiometer and must not be interchanged
headphones
used by the listener to indicate a response
easily damaged
needs to be replaced, not fixed
may be interchanged w/o re-calibration
hand switch
used to verify calibration status of the audiometer during daily biological calibration checks
electroacoustic ear
database application used to manage the HCP within the DoD
Defense Occupational and Environmental Health Readiness System -Hearing Conservation (DOEHRS-HC)
hardware requirements of DOEHRS-HC system
computer system
CCA 200 mini microprocessor audiometer
BAS 200 electroacoustic ear
will help determine best type of booth for clinic area
BGN (back ground noise)
less expensive and has greater portability
BGN <65 dBA
mini booth
heavier walls
BGN 65-79 dBA
standard booth
sounds treated enclosure with a van/bus/trailer
mobile booth
noise levels inside booth must not exceed
27dB at 500Hz
purpose is to standardize output of audiometers worldwide
calibration
three types of calibration
annual electroacoustic calibration
biannual exhaustive calibration
daily biological calibration
annual electroacoustic calibration
biannual exhaustive calibration are performed by
MERC
the exhaustive calibration is performed every ___ in the AF and civilian programs
2 years
daily biological calibration is performed by
OHC
daily calibration checks are documented on
DD Form 2217
who is tasked with certifying booths and how often
BE
once a year
booth repairs can be facilitated by
medical maintenance or MERC
Daily Functional Check
CUCEFICS
Clean
Untangle
Connections
Earphones
Frequency
Intensity
Crosstalk
Static
check should be conducted when tones are being presented in the left side
frequency
check should be conducted when tones are being presented in the right side
intensity
tells us if the equipment is working
daily functional check
tells us if equipment is working correctly
daily biological calibration check
end of day procedures
back-up data/export to Data Repository
must be stored behind two locked doors
close program b4 shutting down computer
clean area
