AmpliVox 270+ - 4.9. SPEECH TESTING PROCEDURES; 4.9.4. USING LIVE SPEECH (EMIC.); 4.9.5. USING RECORDED SPEECH (LINE); 4.9.6. MEASURING THE SRT SCORE

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D-0126050 rev 1 - 270+ Operating Manual
4.9. PERFORMING SPEECH AUDIOMETRY
4.9.1. GENERAL
The Model 270+ has audio line in/out connections (LINE) for CD, tape player or MP3 input (e.g. for recorded
speech testing) and amplifier output (MIC.).
Press the FROM button to select between LINE and MIC. Output.
1a
Module
Speech module
1b
SRT Test
Select F1 to start SRT test
2
Test Level
Current present level of selected ear (in this example right ear)
3
Monitor Level
The current monitor level of the headset for the examiner, to listen to the same
test sounds as the patient. Use the frequency buttons to change the monitor
level
4
Gain Level
Use the Channel 2 rotary control to change the gain level
5
Line or eMic
Current selection of either line in (e.g. CD) or external Mic (eMic) for presenting
the speech signals. Use F2 to change between the two.
6
Monitor
Level above shows the current monitor level
7
Gain
Level above shows the current gain level
8
Transducer
Phones, Insert, FField (FreeField)
9
Test ear
Left, Right, or Both (Speech and Special Tests)
4.9.2. TEST EAR
In speech mode it is possible to test either the left or right ear or both ears at the same time via headphones.
Use the EAR button or the softkey F4 to choose the presented ear.
4.9.3. MONITOR FUNCTION
Where an acoustic booth/room is used, a patient microphone is installed in the booth and connected to the
270+ unit. The operator can then hear the patient through the headset.
In order to adjust the monitor listening levels, the frequency control buttons
can be used.
The level of the patient's responses is controlled by using the talkback function as described in chapter 4.6.3.
1a
1b
8
9
5
6
7
2
3
4