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ReSound Advanced Technology Series: Warp Compression

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1.  Which of the following gain prescriptions are available in the ReSound fitting software? Audiogram+ NAL-NL2 DSL 5 All of the above

2.  What is an advantage of fast time constants for compression? The dynamics of the input signal are preserved More of the speech signal is placed above the impaired hearing threshold It gives the best sound quality for everyone It eliminates the need for output limiting

3.  A general rule of thumb when selecting the MPO of a ReSound hearing aid is: Not to set it below about 95 dB Not to set it above 95 dB To adjust according to the user's aided audibility for soft sounds To always verify it in the real ear

4.  Wide dynamic range compression means that: The hearing aid is digital A volume control is essential The amplification of the signal occurs over a large range of input levels The amplification is intended for extended high frequency bandwidth

5.  Compared to NAL-NL2, what can be said about Audiogram+? Generally speaking, Audiogram+ prescribes more mid frequency gain and less high frequency gain than NAL-NL2 Audiogram+ provides greater loudness than NAL-NL2 Objective and subjective outcomes with each prescription are similar on a group basis, but with individual preferences All of the above

6.  Which of the following is not a way to verify a ReSound hearing aid fitting? Speech mapping In situ audiometry Insertion gain measurements Coupler measurements

7.  Which of the following would be expected when performing real ear verification of ReSound hearing aids? Individual variation in predicted versus measured values of 10 dB or more Some variation in match to target depending on device characteristics, such as receiver power level Dependency on open versus occluding coupling options in fitting software for new (LiNX 3D) products All of the above

8.  What compression options are offered for fitting high power and ultra power ReSound hearing aids? Wide Dynamic Range Compression Semi-linear Linear All of the above

9.  Expansion in ReSound hearing aids: Reduces discomfort associated with loud sounds Has kneepoints that are set in accordance with the noise floor of the specific hearing aid model Increases gain below the expansion kneepoint Cannot be adjusted

10.  Which of the following is not true about frequency warping? It is an efficient technique for frequency analysis that maps directly to a non-linear scale It can be designed to provide frequency resolution similar to a model of the human cochlea It has a frequency dependent latency that is similar to that of the cochlea for moderate level inputs It has the shortest delay of all commercial hearing aids