Exam Preview

What is Good Hearing Aid Sound Quality, and Does it Really Matter?

---

1.  What are the key variables described as being important for a good sound quality? Audibility for all sounds Input dynamic range matched to the hearing aid users UCL Low delay, High input dynamic range, Wide frequency range, No unintentional artefacts Fast acting compression

2.  What is the maximum allowed hearing aid delay in order to ensure a good sound quality? 1 ms 10 ms 40 ms 150 ms

3.  The Widex DREAM hearing aid has an upper limit input dynamic range of: 95 dB SPL 102 dB SPL 108 dB SPL 113 dB SPL

4.  What is the recommended upper frequency limit desired to provide audibility for high frequency speech sounds? 3-3.5 kHz 7.7 kHz 6.2 kHz 8-10 kHz

5.  Research suggests that a wide hearing aid bandwidth is important for Speech perception and sound quality Speech perception and no artefacts Speech perception only Sound quality only

6.  What are the detrimental artifacts of fast regulation on speech perception? Inaudible background sound Exaggerated temporal variation in level Spectral and temporal smearing Frequency compression

7.  Widex puts forth a substantial effort to ensure acoustic transparency – defined as: As open a fitting as possible Hearing aid sound which is as close as possible to the original sound source and without audible artifacts Loudness normalization Loudness equalization

8.  The overall goal/goals for the Widex fitting rationale is/are: Optimal speech understanding, Natural sound quality, Natural loudness reproduction, Preservation of comfort. Instant acceptance Low occlusion effect Optimal speech understanding

9.  In the double blinded study, the Widex DREAM440 hearing aid was perceived as having a: High degree of naturalness and fullness High degree of distortion High degree of sharpness High degree of loudness

10.  The hearing aids in the benchmark test were assessed by The “golden ear” panel at Widex Computer simulations A panel of hearing impaired listeners Normal hearing listeners