A5002765759- Hearing Loss and Rehabilitation
- Noise Effects and Management
- Hearing, Cochlea, Tinnitus, Genetics
- Speech and Audio Processing
- Acoustic Wave Phenomena Research
- Advanced Adaptive Filtering Techniques
- Neuroscience and Music Perception
- Ear Surgery and Otitis Media
Duke University
2006-2019
MED-EL (Austria)
2016-2019
Objectives: In natural hearing, cochlear mechanical compression is dynamically adjusted via the efferent medial olivocochlear reflex (MOCR). These adjustments probably help understanding speech in noisy environments and are not available to users of current implants (CIs). The aims present study to: (1) a binaural CI sound processing strategy inspired by control provided contralateral MOCR hearing; (2) assess benefits new for presented competition with steady noise speech-like spectrum...
Abstract Cochlear implants (CIs) do not offer the same level of effectiveness in noisy environments as quiet settings. Current single-microphone noise reduction algorithms hearing aids and CIs only remove predictable, stationary noise, are ineffective against realistic, non-stationary such multi-talker interference. Recent developments deep neural network (DNN) have achieved noteworthy performance speech enhancement separation, especially removing noise. However, more work is needed to...
Objectives: Cochlear implant (CI) users continue to struggle understanding speech in noisy environments with current clinical devices. We have previously shown that this outcome can be improved by using binaural sound processors inspired the medial olivocochlear (MOC) reflex, which involve dynamic (contralaterally controlled) rather than fixed compressive acoustic-to-electric maps. The present study aimed at investigating potential additional benefits of more realistic implementations MOC...
Cochlear implant (CI) users find it hard and effortful to understand speech in noise with current devices. Binaural CI sound processing inspired by the contralateral medial olivocochlear (MOC) reflex (an approach termed 'MOC strategy') can improve speech-in-noise recognition for users. All reported evaluations of this strategy, however, disregarded automatic gain control (AGC) fine-structure (FS) processing, two standard features some To better assess potential implementing MOC strategy...
Our two ears do not function as fixed and independent sound receptors; their functioning is coupled dynamically adjusted via the contralateral medial olivocochlear efferent reflex (MOCR). The MOCR possibly facilitates speech recognition in noisy environments. Such a role, however, yet to be demonstrated because selective deactivation of during natural acoustic listening has been possible for human subjects up until now. Here, we propose that this other roles may elucidated using unique...
Cochlear implant subjects continue to experience difficulty understanding speech in noise and performing pitch-based musical tasks. Acoustic model studies have suggested that transmitting additional fine structure via multiple stimulation rates is a potential mechanism for addressing these issues [Nie et al., IEEE Trans. Biomed. Eng. 52, 64–73 (2005); Throckmorton Hear. Res. 218, 30–42 (2006)]; however, results from preliminary cochlear been less compelling. Multirate processing algorithms...
The present study investigated three different reverberation suppression rules based on the parametric ideal ratio mask, which is a generalization of classical Wiener filter with additional parameters controlling threshold and slope. Automatic selection parameter values for mask was performed using particle swarm optimization. Three sets were tested sentences corrupted by reverberation. results demonstrated that when optimizing an objective measure speech quality rather than intelligibility,...
Cochlear implant sound processing strategies that use time-varying pulse rates to transmit fine structure information are one proposed method for improving the spectral representation of a with eventual goal speech recognition in noisy conditions, tonal languages, and music identification appreciation. However, many perceptual phenomena associated not well understood. In this study, effects stimulus duration on both place rate-pitch percepts were investigated via psychophysical experiments....
Cochlear implant (CI) systems differ in terms of electrode design and signal processing. It is likely that patients fit with different will experience percepts when presented speech via their implant. The sound quality can be evaluated by asking single-sided-deaf (SSD) listeners a cochlear to modify clean signals typically hearing ear match the CI ear. In this paper, we describe very close matches quality, i.e., similarity ratings 9.5 10 on 10-point scale, ten 28 mm array MED EL...
Abstract Cochlear implants (CIs) fail to provide the same level of benefit in noisy settings as quiet. Current noise reduction solutions hearing aids and CIs only remove predictable, stationary noise, are ineffective against realistic, non-stationary such multi-talker interference. Recent developments deep neural network (DNN) models have achieved noteworthy performance speech enhancement separation. However, little work has investigated potential DNN removing The research this regard is...
Multirate sound processing strategies may potentially provide improved speech recognition and music perception in cochlear implants (Nie et al., 2005; Throckmorton 2006), although it be necessary to tune these using psychophysical data maximum benefit the user (Throckmorton 2006). To investigate need for tuning, implant users participated several rate-based experiments. Subjects performed single- two-rate pitch ranking tasks influence of pulse rate on overall structure. The introduction a...
Current speech processing strategies use amplitude-modulated fixed rate pulse trains to communicate information. Using acoustic models, researchers have recently demonstrated that variable stimulation strate- gies may provide an improvement of perception in noise and music [Nie et al., 2005; Stohl Collins, 2006; Throckmorton al. (2006) (in press)]. It has been hypothesized successful implementation these will require psychophysics-based tuning. An experimental interface is needed implement...