Latent neural dynamics encode temporal context in speech
Hear Res. 2023 Jul 4;437:108838. doi: 10.1016/j.heares.2023.108838. Online ahead of print.ABSTRACTDirect neural recordings from human auditory cortex have demonstrated encoding for acoustic-phonetic features of consonants and vowels. Neural responses also encode distinct acoustic amplitude cues related to timing, such as those that occur at the onset of a sentence after a silent period or the onset of the vowel in each syllable. Here, we used a group reduced rank regression model to show that distributed cortical responses support a low-dimensional latent state representation of temporal context in speech. The timing cues ...
Source: Hearing Research - July 13, 2023 Category: Audiology Authors: Emily P Stephen Yuanning Li Sean Metzger Yulia Oganian Edward F Chang Source Type: research
Objective discrimination of bimodal speech using frequency following responses
Hear Res. 2023 Jul 9;437:108853. doi: 10.1016/j.heares.2023.108853. Online ahead of print.ABSTRACTBimodal hearing, in which a contralateral hearing aid is combined with a cochlear implant (CI), provides greater speech recognition benefits than using a CI alone. Factors predicting individual bimodal patient success are not fully understood. Previous studies have shown that bimodal benefits may be driven by a patient's ability to extract fundamental frequency (f0) and/or temporal fine structure cues (e.g., F1). Both of these features may be represented in frequency following responses (FFR) to bimodal speech. Thus, the goals...
Source: Hearing Research - July 13, 2023 Category: Audiology Authors: Can Xu Fan-Yin Cheng Sarah Medina Erica Eng Ren é Gifford Spencer Smith Source Type: research
Latent neural dynamics encode temporal context in speech
Hear Res. 2023 Jul 4;437:108838. doi: 10.1016/j.heares.2023.108838. Online ahead of print.ABSTRACTDirect neural recordings from human auditory cortex have demonstrated encoding for acoustic-phonetic features of consonants and vowels. Neural responses also encode distinct acoustic amplitude cues related to timing, such as those that occur at the onset of a sentence after a silent period or the onset of the vowel in each syllable. Here, we used a group reduced rank regression model to show that distributed cortical responses support a low-dimensional latent state representation of temporal context in speech. The timing cues ...
Source: Hearing Research - July 13, 2023 Category: Audiology Authors: Emily P Stephen Yuanning Li Sean Metzger Yulia Oganian Edward F Chang Source Type: research
Interaural frequency mismatch jointly modulates neural brainstem binaural interaction and behavioral interaural time difference sensitivity in humans
Hear Res. 2023 Jul 5;437:108839. doi: 10.1016/j.heares.2023.108839. Online ahead of print.ABSTRACTThe binaural interaction component (BIC) of the auditory brainstem response (ABR) is the difference obtained after subtracting the sum of right and left ear ABRs from binaurally evoked ABRs. The BIC has attracted interest as a biomarker of binaural processing abilities. Best binaural processing is presumed to require spectrally-matched inputs at the two ears, but peripheral pathology and/or impacts of hearing devices can lead to mismatched inputs. Such mismatching can degrade behavioral sensitivity to interaural time differenc...
Source: Hearing Research - July 10, 2023 Category: Audiology Authors: Carol A Sammeth Andrew D Brown Nathaniel T Greene Daniel J Tollin Source Type: research
Interaural frequency mismatch jointly modulates neural brainstem binaural interaction and behavioral interaural time difference sensitivity in humans
Hear Res. 2023 Jul 5;437:108839. doi: 10.1016/j.heares.2023.108839. Online ahead of print.ABSTRACTThe binaural interaction component (BIC) of the auditory brainstem response (ABR) is the difference obtained after subtracting the sum of right and left ear ABRs from binaurally evoked ABRs. The BIC has attracted interest as a biomarker of binaural processing abilities. Best binaural processing is presumed to require spectrally-matched inputs at the two ears, but peripheral pathology and/or impacts of hearing devices can lead to mismatched inputs. Such mismatching can degrade behavioral sensitivity to interaural time differenc...
Source: Hearing Research - July 10, 2023 Category: Audiology Authors: Carol A Sammeth Andrew D Brown Nathaniel T Greene Daniel J Tollin Source Type: research
