APPENDIX 1 - SPEECH AUDIOMETRY
29 MODEL 260 INSTRUCTION FOR USE
e) Input signal adjustment should be made to adjust for the operator’s voice to peak at the 0dB point on the LEVEL
dB bar graph; the earphone output will then be 89dBSPL for a SIGNAL setting of 70 dBHL and 1kHz puretone into
an IEC 318 ear simulator
f) The output level is controlled by the SIGNAL keys in 2.5dB or 5dB steps (depending on settings - see Section
3.4.2)
g) Sound from MIC1 is continually routed to the patient - to interrupt this, press and hold the PRESENT key; if a
constant presentation to the patient is not desired, press the CONSTANT key (the LED will extinguish) and use the
PRESENT key while presenting the test material
A1.1.2 Procedure:
The operator may now read the required word list to the subject and record the responses; the patient may respond
either by (a) repeating the spoken material or (b) writing the words. If the response is spoken, the operator should use
the TALKBACK key to hear this response (see operator monitoring above).
A1.2 LIVE VOICE SPEECH AUDIOMETRY WITH CONTRALATERAL MASKING
A1.2.1 Set Up - as described in A1.1.1 then:
a) Select MASK
b) INT is now displayed indicating that internal masking is selected (Note: External masking is not available when
MIC is selected)
c) Speech-weighted masking is now routed to the opposite earphone to that selected
d) The MASKING keys change the masking level in 2.5dB or 5dB steps (depending on settings - see Section 3.4.2)
e) If required, readjustment of the input signal level can be accessed by pressing the MASK key to temporarily
deselect the masking function; proceed as in A1.1.1d) and when adjustment has been completed press the MASK
key to activate the masking noise
A1.2.2 Procedure:
As described in A1.1.2 but adjusting the masking level as required using the MASKING keys.
A1.3 RECORDED SPEECH AUDIOMETRY TO HEADPHONES
A1.3.1 Set Up:
a) Connect a CD, tape player, or other sound source to the LINE IN jack socket; refer to Section 2.7 of this operating
manual
b) Press SPEECH repeatedly to ensure that ‘LINE’ is displayed in capitals at the bottom left of the display (indicating
that the input from LINE IN is selected)
c) The line input is initially routed to the left earphone. To select the right earphone press RIGHT
d) The input signal level is adjusted in 1dB steps by use of the MASKING keys
e) Play the 1kHz calibration tone on the recorded material and adjust the input signal such that the LEVEL dB bar
graph reads 0dB; the headphone output measured in an IEC 318 ear simulator will now be 89dBSPL for a setting
of 70 dBHL
h) The output level is controlled by the SIGNAL keys in 2.5dB or 5dB steps (depending on settings - see Section
3.4.2)
i) Sound from LINE IN is continually routed to the patient - to interrupt this, press and hold the PRESENT key; if a
constant presentation to the patient is not desired, press the CONSTANT key (the LED will extinguish) and use the
PRESENT key while presenting the test material
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