Exam Preview

Research QuickTakes Volume 1: Understanding and Treating the Background Noise Problem for Hearing Aid Users

---

1.  People tend to raise their voice when background noise is present. Research has revealed that when the background noise reaches 75 dB SPL, the signal-to-noise ratio will be about: 0 dB 7 dB 12 dB 20 dB

2.  According to MarkeTrak10 data, people who report having hearing loss but do NOT wear hearing aids state their satisfaction for listening to speech in background noise is approximately which of the following? 30% 50% 70% 90%

3.  Which of the following has NOT been a development of directional hearing aid processing in the past 10-15 years? Improvement of SNR by ~20 dB Ability to tract a moving noise source from behind Ability to focus on a speaker talking from behind the listener Using bilateral beamforming, ability to focus on a narrow directional area of interest in the “look direction” of the patient.

4.  If we compare the manufacturer’s “first fit” to a verified NAL-NL2 fitting, what will the most notable difference be? More gain for the “first fit” in the low frequencies More gain for the “first fit” in the high frequencies More gain for the NAL-NL2 in the low frequencies More gain for the NAL-NL2 in the high frequencies

5.  The performance of the directional CROS is enhanced by which innovation? Only low frequencies are transmitted to the good ear. Only high frequencies are transmitted to the good ear. The directionality for the off-side microphone is slightly skewed toward the side of the poorer hearing The directionality for the off-side microphone is totally focused toward the side of the good hearing