Recovery from forward masking in cochlear implant listeners depends on stimulation mode, level, and electrode location
| Autor: | Monita Chatterjee, Aditya M. Kulkarni |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Adult
Male medicine.medical_specialty Materials science Speech perception Time Factors Acoustics and Ultrasonics Adolescent Acoustics medicine.medical_treatment Loudness Perception Population Perceptual Masking Stimulation Audiology Prosthesis Design 01 natural sciences Loudness 03 medical and health sciences Young Adult 0302 clinical medicine Arts and Humanities (miscellaneous) Cochlear implant 0103 physical sciences medicine Humans Psychoacoustics education Child 010301 acoustics Aged education.field_of_study Auditory Threshold Middle Aged Psychological and Physiological Acoustics Cochlear Implantation Electric Stimulation Cochlear Implants Persons With Hearing Impairments Acoustic Stimulation Electrode Speech Perception Female Noise 030217 neurology & neurosurgery |
| Zdroj: | The Journal of the Acoustical Society of America. 141(5) |
| ISSN: | 1520-8524 |
| Popis: | Psychophysical recovery from forward masking was measured in adult cochlear implant users of CochlearTM and Advanced BionicsTM devices, in monopolar and in focused (bipolar and tripolar) stimulation modes, at four electrode sites across the arrays, and at two levels (loudness balanced across modes and electrodes). Results indicated a steeper psychophysical recovery from forward masking in monopolar over bipolar and tripolar modes, modified by differential effects of electrode and level. The interactions between factors varied somewhat across devices. It is speculated that psychophysical recovery from forward masking may be driven by different populations of neurons in the different modes, with a broader stimulation pattern resulting in a greater likelihood of response by healthier and/or faster-recovering neurons within the stimulated population. If a more rapid recovery from prior stimulation reflects responses of neurons not necessarily close to the activating site, the spectral pattern of the incoming acoustic signal may be distorted. These results have implications for speech processor implementations using different degrees of focusing of the electric field. The primary differences in the shape of the recovery function were observed in the earlier portion (between 2 and 45 ms) of recovery, which is significant in terms of the speech envelope. |
| Databáze: | OpenAIRE |
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