Speech Recognition and Acoustic Features in Combined Electric and Acoustic Stimulation

Mandarin Speech Perception in Combined Electric and Acoustic Stimulation

For deaf individuals with residual low-frequency acoustic hearing, combined use of a cochlear implant (CI) and hearing aid (HA) typically provides better speech understanding than with either device alone. Because of coarse spectral resolution, CIs do not provide fundamental frequency (F0) information that contributes to understanding of tonal languages such as Mandarin Chinese. The HA can prov...

Physiological Mechanisms in Combined Electric-Acoustic Stimulation.

OBJECTIVE Electrical stimulation is normally performed on ears that have no hearing function, i.e., lack functional hair cells. The properties of electrically-evoked responses in these cochleae were investigated in several previous studies. Recent clinical developments have introduced cochlear implantation (CI) in residually-hearing ears to improve speech understanding in noise. The present stu...

Dichotic Speech Recognition: Acoustic and Electric Hearing

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Rethinking derived acoustic features in speech recognition

We present a new acoustic model for speech recognition that explicitly accounts for information omitted from current acoustic models: the definitions of derived acoustic features such as estimated derivatives. We incorporate this information using the method of maximum entropy. We find that, compared to the corresponding HMM, our model cuts an already low error rate about in half for a simple t...

Quality standards for combined electric and acoustic stimulation.