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Signia Expert Series: Ten (or More) Common Misconceptions Related to Fitting Hearing Aids

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1.  In a common mild-to-moderate downward sloping hearing loss, with a perfect (verified) fit to NAL-NL2 target, we would expect that aided SII for a 65 dB SPL input to be around: ~30% ~50% ~70% ~90%

2.  In a typical open fitting, fitted to NAL-NL2 targets, with the noise reduction set to “max,” how much noise reduction truly is present in the real ear at 500 Hz? ~0-2 dB ~3-5 dB ~6-8 dB ~9-12 dB

3.  With good directional technology, and a closed earmold, the directional advantage (SNR benefit) should be about 6 dB (compared to omnidirectional). What would you expect the SNR benefit to be when an open fitting is employed? ~6 dB (no change) ~4-5 dB (some change) ~2-3 dB (significant change) ~0 dB (there no longer will be SNR benefit)

4.  When using the manufacturer’s proprietary fitting for a typical downward sloping hearing loss, what would be the expected real-ear output for soft speech in the high frequencies (3000 and 4000 Hz) when compared to verified NAL-NL2 targets? The output would be slightly higher The output would be about the same as the NAL The output would be slightly lower than the NAL verified targets The output would be significantly lower than the NAL verified targets

5.  When using the manufacturer’s NAL-NL2 fitting for a typical downward sloping hearing loss, what would be the expected real-ear output for soft speech in the high frequencies (3000 and 4000 Hz) when compared to verified NAL-NL2 targets? The output would be slightly higher The output would be about the same as the NAL The output would be slightly lower than the NAL verified targets The output would be significantly lower than the NAL verified targets