Area:
Psychoacoustics, Cochlear implants
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High-probability grants
According to our matching algorithm, Donna L. Neff is the likely recipient of the following grants.
Years |
Recipients |
Code |
Title / Keywords |
Matching score |
1991 — 2000 |
Neff, Donna L |
R01Activity Code Description: To support a discrete, specified, circumscribed project to be performed by the named investigator(s) in an area representing his or her specific interest and competencies. |
Auditory Processing of Uncertain Stimuli @ Father Flanagan's Boys'Home
The long-term goal of this project is a better understanding of the interaction of peripheral and central auditory processes that determine performance under conditions of stimulus uncertainty, that is, when one or more of the physical properties of the sounds cannot be predicted. Unlike many psychophysical studies which seek to minimize the influence of central processes, these experiments examine conditions in which central processes significantly influence or dominate performance. Our previous work has focused on the large effects of masker frequency uncertainty in the detection of a known signal. In the proposed work, we undertake a more general examination of the effects of stimulus uncertainty, adopting a common approach to the measurement of both masker and signal uncertainty. The absence of such an approach has hindered the development of more general models of the effects of uncertainty. We test the hypothesis that uncertainty effects may best be understood in terms of the ratio of relevant (to be processed) variability to irrelevant (to be ignored) variability, in an information-based analog to the ratio of signal-to-noise-powers that govern energy-based masking. We first develop stimuli and procedures which allow us to quantify the amount of masker uncertainty, and then use these to explore the effects of irrelevant uncertainty both alone and in combination with effects of relevant variation or effects of energy-based masking. The experiments proposed are grouped in three series which examine: 1) how best to measure uncertainty; 2) the sources of the uncertainty effects; and 3) the combination rules for the effects of irrelevant uncertainty, relevant uncertainty, and energy-based masking. Because stimulus uncertainty is inherent in everyday listening situations, these experiments will contribute to more realistic models of auditory processing that include both peripheral and central processes.
|
0.912 |
2005 — 2006 |
Neff, Donna L |
F33Activity Code Description: To provide opportunities for experienced scientists to make major changes in the direction of research careers, to broaden scientific background, to acquire new research capabilities, to enlarge command of an allied research field, or to take time from regular professional responsibilities for the purpose of increasing capabilities to engage in health-related research. |
Pattern Perception Measures For Cochlear-Implant Users @ Father Flanagan's Boys'Home
DESCRIPTION (provided by applicant): The training proposed supports the objective of a new translational research program for the PI that will focus on issues related to sound-segregation and music perception abilities of children and adults with CIs. The proposed experiments use new pattern-identification tasks in quiet and with various background sounds to test listeners' abilities to use frequency-based cues to separate relevant from irrelevant sounds. These non-speech measures are expected to increase our limited understanding of how language-independent processes contribute to the large individual differences observed in performance with CIs, and help guide new stimulus-processing or habilitation strategies to improve music perception. The approach can readily be extended to other types of stimuli, including speech patterns and backgrounds. The first specific aim is to determine the ability of young normal-hearing (NH) children to use frequency-based cues across pattern/background to aid pattern identification, with and without Cl simulations. The second specific aim is to use these same stimuli to characterize performance in adults with CIs. The final aim is to use what is learned in these earlier studies to optimally examine pattern identification in young children with CIs, the intended focus of the PI's future research program. In the course of completing these aims, the PI will acquire the necessary knowledge, skills, and data for a competitive R21 or R01 application in this area.
|
0.912 |