Welch Allyn OAE Hearing Screener - User Manual - Manual (Page 7)

Welch Allyn OAE Hearing Screener Directions for Use 705353 Rev F 6
About this manual
This manual gives step by step instructions on how to perform OAE tests and view results on the
Welch Allyn OAE Hearing Screener.
Conventions The Welch Allyn OAE Hearing Screener manual uses specific font styles to
identify aspects of the system operation.
References to the buttons on the front label of the Welch Allyn OAE Hearing
Screener are always typed in all caps.
Labels referring to the names of the connectors that are on the front label of
the Welch Allyn OAE Hearing Screener are typed in bold text.
Help For additional assistance, please contact Welch Allyn Technical Support at
1-800-535-6663.
Abbreviations
ART LVL - artifact level; refers to the threshold at which samples of data
coming into the Welch Allyn OAE Hearing Screener for processing are
rejected before averaging in order to keep noise from averaging into the
response. Artifact level is reported in pressure units, milliPascals (mPa).
WA OAE Load Software - loads the firmware that resides on the memory
chip inside the Welch Allyn OAE Hearing Screener. This software also can
be used to update the Welch Allyn OAE Hearing Screener date, time and
default protocol.
COM - communications port on a computer; also known as serial port.
dB - decibel; a logarithmic measure of sound intensity.
DP Frequency - the frequency at which the distortion product (DP) emission
occurs.
DPOAE - distortion product otoacoustic emission; refers to the acoustic
energy generated by the outer hair cells of the cochlea in response to
stimulation with two pure tone stimuli.
DP - distortion product; used interchangeably with DPOAE. The DP that has
received the greatest interest and is most often measured clinically is the DP
that is calculated by the formula 2F1-F2.
DP-NF - the dB difference between the distortion product emission and the
noise floor amplitudes. To be sure that a response is present, the DP-NF
value must match or exceed a minimum. On the Welch Allyn OAE Hearing
Screener, this value is 6 dB or greater.
DX - a button on the front panel of the Welch Allyn OAE Hearing Screener
which is used to SELECT and implement functions described on the LCD.
F2 - the higher of the two stimulus frequencies used in a DPOAE test.