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How Loud is Too Loud? Using LDL Measures for Hearing Aid Fitting and Verification (PART 1)

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1.  In general, survey have suggested that the percent of people who are "satisfied" with the loudness levels of their hearing aids is: About 95% About 90% About 80% About 75% Below 70%

2.  When using the Cox Loudness Anchors, a person's LDL would be this numerical rating: #2 #5 #6 #7 #8

3.  When giving instructions for LDL testing, the key indicator for the desired loudness level is: When the sound is first uncomfortable When the sound would be uncomfortable after several minutes When the sound in no longer When the sound in painful When the sound is extremely painful even after a moment

4.  Using the data from Bentler and Cooley, how would the LDL for someone with a 50 dB cochlear loss compare to the LDL for someone with normal hearing? About the same About 5 dB lower About 5 dB higher About 10 dB lower About 10 dB higher

5.  Using the data from Bentler and Cooley, what is the inter-subject range for LDLs for someone with a 50 dB cochlear loss? About 10 dB About 15 dB About 20 dB About 30 dB Greater than 40 dB

6.  If you're going to use the patient's LDLs for the pre-fitting programming of their hearing aids, the best input signal to use would be: Real speech Speech noise Pink noise Pure tones White noise

7.  Let's say you know a person's LDL at 2000 Hz is 100 dB (using insert phones). How would you convert this to a desired AGCo setting? Add 20 dB to 100 Add the RECD to 100 Add the RETSPL to 100 Add the REDD to 100 Hope the programming software will do it for you

8.  For the same patient above, if you're conducting probe-mic verification of the hearing aid's output, how would you obtain a "target RESR"? Add 20 dB to 100 Add the RECD to 100 Add the RETSPL to 100 Add 15 dB to 100 Add the REDD to 100

9.  What is the potential advantage of multi-channel AGCo (compared to single channel)? Loud sounds can be prevented from being uncomfortably loud Headroom can be maximized for different frequency regions Soft sounds are more audible Less distortion for high-level inputs Soft sounds are no over-amplified

10.  What is a consideration that must be made when selecting AGCo kneepoints for open canal fittings? Residual ear canal resonance may make maximum output higher than expected in 2000-3000 Hz region Because of sound leakage, AGCo kneepoints should be set higher in the 2000-3000 Hz range Because of summation effects, loudness problems may exist in the 500-1000 Hz range Probe-mic RESR measures will not be valid with open canal fittings All of the above