GSi 61 - Speech Testing Procedures

Test Procedure
Test the better ear first.
Repeat the sections on Patient Familiarization and Threshold Determination for each tone
setting in the following order: 1000 Hz, 2000 Hz, 4000 Hz, 8000 Hz. Retest 1000 Hz followed by
500 Hz and 250 Hz. If there is a difference of 20 dB or greater between octaves, test the inter-
octave frequencies, i.e. 750 Hz, 1500 Hz, 3000 Hz, and 6000 Hz. Record these settings by
pressing the Save pushbutton with each threshold level.
Repeat this procedure with the other ear.
Determine if masking should be used. The use of masking in the contralateral ear (non-test ear)
is indicated if there is a difference in threshold between the two ears of approximately 35 dB or
more. If necessary, repeat the testing with masking and again record the testing process.
Spondaic Speech Testing, Speech Reception Threshold (SRT)
Instruct the patient that he or she will be hearing words that have two parts, such as “mushroom”
or “baseball.” The patient should repeat the words and if not sure, he or she should not be
afraid to guess.
Using either live voice or recorded speech, present the standardized word lists W-1 and W-2
(Appendix 1 in the guide), testing the better ear first. Start 20 dB above the 1000 Hz pure tone
threshold level. Present one word on the list and, if the response is correct, lower the level by
2 dB. Continue until the patient has difficulty with the words. When this occurs, present more
words for each 2 dB step.
The Speech Reception Threshold (SRT) is recorded at 2 dB above the level at which the
patient cannot repeat any words correctly.
Speech Discrimination (PB Words)
Instruct the patient that he or she is to repeat the words presented.
Using either live voice or recorded speech, present the standardized PB word list W-22
(Appendix 1 in this guide). Present the words at a level comfortable to the patient; at least 30
dB and generally 35 to 50 dB above the 1000 Hz pure tone threshold. Using the scorer buttons
on the front panel, press the “Correct” button each time the right response is given and the
“Incorrect” button each time a wrong response is given.
The Discrimination Score is the percentage of words repeated correctly: Discrimination % at
HL = 100 x Number of Correct Responses/Number of Trials.
Grason-Stadler GSI
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61 CLINICAL AUDIOMETER
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1761-0100 Rev. B