How to perform QuickSIN with Equinox Evo
Difficulty with hearing in background noise is a common complaint among hearing aid users. Therefore, the measurement of SNR loss (signal-to-noise ratio loss) is important because a person's ability to understand speech in noise cannot be reliably predicted from the pure tone audiogram.
The QuickSIN test was developed to provide a quick estimate of SNR loss. A list of six sentences with five key words per sentence is presented in four-talker babble noise. The sentences are presented at pre-recorded SNR ratios which decrease in 5-dB steps from 25 (very easy) to 0 (extremely difficult).
The SNRs used are: 25, 20, 15, 10, 5 and 0, encompassing normal to severely impaired performance in noise.
Required equipment
- Equinox Evo
- Licensed AC440 Audiometry module
- Calibrated headphones, insert phones or free-field speakers
Test procedure
- Open the AC440 module and enter the QuickSIN screen by selecting Menu | Tests | QuickSIN.
- Select the output level. For most of the tracks, the channels are synchronised to ensure that the correct SNR level is achieved. Note: the 'Speech and Babble' lists are not synchronised and will require the user to manually alter these to ensure the correct SNR setting for the test.
- Select a list in the dropdown.
- Instruct the patient to repeat the sentences and try to ignore the noise that they will also hear through the headphones.
- Press START to begin the test.
- The number of words in bold the patient repeats correctly should be scored by clicking on the score buttons.
- When 6 sentences are scored, a total score will be calculated. Note that if you press Stop before the 6 sentences of the list have been played and scored, no total score will be calculated.
- The total score can be compared to the 'SNR loss definitions'.
- Save the QuickSIN test by clicking Save.
QuickSIN results
The SNR loss is 25.5 minus the total score. The total score is a sum of the score for each sentence (Figure 2). The SNR loss is then categorized based on the definition seen in the table in the test screen (Figure 1).
For more details on how to perform the QuickSIN test, please read the QuickSIN manual.
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