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Petley L, Blankenship C, Hunter LL, Stewart HJ, Lin L, Moore DR. Amplitude Modulation Perception and Cortical Evoked Potentials in Children With Listening Difficulties and Their Typically Developing Peers. JOURNAL OF SPEECH, LANGUAGE, AND HEARING RESEARCH : JSLHR 2024; 67:633-656. [PMID: 38241680 PMCID: PMC11000788 DOI: 10.1044/2023_jslhr-23-00317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 09/01/2023] [Accepted: 11/09/2023] [Indexed: 01/21/2024]
Abstract
PURPOSE Amplitude modulations (AMs) are important for speech intelligibility, and deficits in speech intelligibility are a leading source of impairment in childhood listening difficulties (LiD). The present study aimed to explore the relationships between AM perception and speech-in-noise (SiN) comprehension in children and to determine whether deficits in AM processing contribute to childhood LiD. Evoked responses were used to parse the neural origins of AM processing. METHOD Forty-one children with LiD and 44 typically developing children, ages 8-16 years, participated in the study. Behavioral AM depth thresholds were measured at 4 and 40 Hz. SiN tasks included the Listening in Spatialized Noise-Sentences Test (LiSN-S) and a coordinate response measure (CRM)-based task. Evoked responses were obtained during an AM change detection task using alternations between 4 and 40 Hz, including the N1 of the acoustic change complex, auditory steady-state response (ASSR), P300, and a late positive response (late potential [LP]). Maturational effects were explored via age correlations. RESULTS Age correlated with 4-Hz AM thresholds, CRM separated talker scores, and N1 amplitude. Age-normed LiSN-S scores obtained without spatial or talker cues correlated with age-corrected 4-Hz AM thresholds and area under the LP curve. CRM separated talker scores correlated with AM thresholds and area under the LP curve. Most behavioral measures of AM perception correlated with the signal-to-noise ratio and phase coherence of the 40-Hz ASSR. AM change response time also correlated with area under the LP curve. Children with LiD exhibited deficits with respect to 4-Hz thresholds, AM change accuracy, and area under the LP curve. CONCLUSIONS The observed relationships between AM perception and SiN performance extend the evidence that modulation perception is important for understanding SiN in childhood. In line with this finding, children with LiD demonstrated poorer performance on some measures of AM perception, but their evoked responses implicated a primarily cognitive deficit. SUPPLEMENTAL MATERIAL https://doi.org/10.23641/asha.25009103.
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Affiliation(s)
- Lauren Petley
- Communication Sciences Research Center, Cincinnati Children's Hospital Medical Center, OH
- Patient Services Research, Cincinnati Children's Hospital Medical Center, OH
- Department of Psychology, Clarkson University, Potsdam, NY
| | - Chelsea Blankenship
- Communication Sciences Research Center, Cincinnati Children's Hospital Medical Center, OH
- Patient Services Research, Cincinnati Children's Hospital Medical Center, OH
| | - Lisa L. Hunter
- Communication Sciences Research Center, Cincinnati Children's Hospital Medical Center, OH
- Patient Services Research, Cincinnati Children's Hospital Medical Center, OH
- Department of Otolaryngology, College of Medicine, University of Cincinnati, OH
- Department of Communication Sciences and Disorders, College of Allied Health Sciences, University of Cincinnati, OH
| | | | - Li Lin
- Communication Sciences Research Center, Cincinnati Children's Hospital Medical Center, OH
- Patient Services Research, Cincinnati Children's Hospital Medical Center, OH
| | - David R. Moore
- Communication Sciences Research Center, Cincinnati Children's Hospital Medical Center, OH
- Patient Services Research, Cincinnati Children's Hospital Medical Center, OH
- Department of Otolaryngology, College of Medicine, University of Cincinnati, OH
- Manchester Centre for Audiology and Deafness, The University of Manchester, United Kingdom
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Petley L, Blankenship C, Hunter LL, Stewart HJ, Lin L, Moore DR. Amplitude modulation perception and cortical evoked potentials in children with listening difficulties and their typically-developing peers. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.10.26.23297523. [PMID: 37961469 PMCID: PMC10635202 DOI: 10.1101/2023.10.26.23297523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Purpose Amplitude modulations (AM) are important for speech intelligibility, and deficits in speech intelligibility are a leading source of impairment in childhood listening difficulties (LiD). The present study aimed to explore the relationships between AM perception and speech-in-noise (SiN) comprehension in children and to determine whether deficits in AM processing contribute to childhood LiD. Evoked responses were used to parse the neural origin of AM processing. Method Forty-one children with LiD and forty-four typically-developing children, ages 8-16 y.o., participated in the study. Behavioral AM depth thresholds were measured at 4 and 40 Hz. SiN tasks included the LiSN-S and a Coordinate Response Measure (CRM)-based task. Evoked responses were obtained during an AM Change detection task using alternations between 4 and 40 Hz, including the N1 of the acoustic change complex, auditory steady-state response (ASSR), P300, and a late positive response (LP). Maturational effects were explored via age correlations. Results Age correlated with 4 Hz AM thresholds, CRM Separated Talker scores, and N1 amplitude. Age-normed LiSN-S scores obtained without spatial or talker cues correlated with age-corrected 4 Hz AM thresholds and area under the LP curve. CRM Separated Talker scores correlated with AM thresholds and area under the LP curve. Most behavioral measures of AM perception correlated with the SNR and phase coherence of the 40 Hz ASSR. AM Change RT also correlated with area under the LP curve. Children with LiD exhibited deficits with respect to 4 Hz thresholds, AM Change accuracy, and area under the LP curve. Conclusions The observed relationships between AM perception and SiN performance extend the evidence that modulation perception is important for understanding SiN in childhood. In line with this finding, children with LiD demonstrated poorer performance on some measures of AM perception, but their evoked responses implicated a primarily cognitive deficit.
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Maslin MRD, Wise KJ, Purdy SC. The mismatch response in normal hearing adults: a performance comparison with stimuli relevant for objective validation of hearing aid fittings. Int J Audiol 2023; 62:1084-1094. [PMID: 36628549 DOI: 10.1080/14992027.2022.2142682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 10/17/2022] [Indexed: 01/12/2023]
Abstract
OBJECTIVE A long-standing observation is that the Mismatch Response (MMR) has the potential to offer a clinically feasible index of sound discrimination. However, findings that positively identify MMRs at the individual level have been mixed, even for those who are normally hearing and who can discriminate sounds behaviourally. This complicates interpretation when an MMR is not observed. The objective of this study was to determine the reliability of the MMR using an optimised paradigm and a range of stimuli relevant to audiological applications in relation to objective verification of hearing aid fittings. DESIGN MMRs were measured using an optimised 3-deviant paradigm in response to a range of sounds designed for aided and unaided sound field assessments, including complex tones (CTs) and speech-like signals. STUDY SAMPLE Seventeen normally hearing adults (18-56 years). RESULTS The most robust MMRs were recorded in response to CTs; responses were positively identified in 50 out of 51 instances (98%), assessed via objective Hotelling's T2 bias-free statistical analyses. CONCLUSIONS The results indicate that CTs in conjunction with optimised recording and analysis parameters offer the potential to elicit robust MMRs, supporting future utilisation of MMRs for clinical audiological applications.
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Affiliation(s)
- Michael R D Maslin
- School of Psychology, Speech and Hearing, The University of Canterbury, New Zealand
- Eisdell Moore Centre for Hearing and Balance Research, New Zealand
| | - Kim J Wise
- Eisdell Moore Centre for Hearing and Balance Research, New Zealand
- School of Psychology, Speech Science, The University of Auckland, New Zealand
| | - Suzanne C Purdy
- Eisdell Moore Centre for Hearing and Balance Research, New Zealand
- School of Psychology, Speech Science, The University of Auckland, New Zealand
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Uhler K, Tollin DJ, Gilley PM. EEG Alpha Band Responses Reveal Amplification Benefits in Infants with Hearing Loss. CHILDREN (BASEL, SWITZERLAND) 2023; 10:600. [PMID: 36980158 PMCID: PMC10047398 DOI: 10.3390/children10030600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/13/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023]
Abstract
Our objective was to examine the effects of hearing aid amplification on auditory detection and discrimination in infants who were hard of hearing (IHH) using a physiological measure of auditory perception. We recorded EEG from 41 sleeping IHH aged 1.04 to 5.62 months while presenting auditory stimuli in a mismatch response paradigm. Responses were recorded during two listening conditions for each participant: aided and unaided. Temporal envelopes of the mismatch response in the EEG alpha band (6-12 Hz) were extracted from the latent, time-frequency transformed data. Aided alpha band responses were greater than unaided responses for the deviant trials but were not different for the standard trials. Responses to the deviant trials were greater than responses to the standard trials for the aided conditions but were not different for the unaided conditions. These results suggest that the alpha band mismatch can be used to examine both detection and discrimination of speech and non-speech sounds in IHH. With further study, the alpha band mismatch could expand and refine our abilities to validate hearing aid fittings at younger ages than current clinical protocols allow.
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Affiliation(s)
- Kristin Uhler
- Department of Physical Medicine and Rehabilitation, University of Colorado Anschutz School of Medicine & Children's Hospital Colorado, Aurora, CO 80045, USA
| | - Daniel J Tollin
- Department of Physiology and Biophysics, University of Colorado Anschutz School of Medicine, Aurora, CO 80045, USA
| | - Phillip M Gilley
- Department of Physical Medicine and Rehabilitation, University of Colorado Anschutz School of Medicine & Children's Hospital Colorado, Aurora, CO 80045, USA
- Institute of Cognitive Science, University of Colorado Boulder, Boulder, CO 80309, USA
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Ching TYC, Zhang VW, Ibrahim R, Bardy F, Rance G, Van Dun B, Sharma M, Chisari D, Dillon H. Acoustic change complex for assessing speech discrimination in normal-hearing and hearing-impaired infants. Clin Neurophysiol 2023; 149:121-132. [PMID: 36963143 DOI: 10.1016/j.clinph.2023.02.172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 01/15/2023] [Accepted: 02/12/2023] [Indexed: 03/08/2023]
Abstract
OBJECTIVE This study examined (1) the utility of a clinical system to record acoustic change complex (ACC, an event-related potential recorded by electroencephalography) for assessing speech discrimination in infants, and (2) the relationship between ACC and functional performance in real life. METHODS Participants included 115 infants (43 normal-hearing, 72 hearing-impaired), aged 3-12 months. ACCs were recorded using [szs], [uiu], and a spectral rippled noise high-pass filtered at 2 kHz as stimuli. Assessments were conducted at age 3-6 months and at 7-12 months. Functional performance was evaluated using a parent-report questionnaire, and correlations with ACC were examined. RESULTS The rates of onset and ACC responses of normal-hearing infants were not significantly different from those of aided infants with mild or moderate hearing loss but were significantly higher than those with severe loss. On average, response rates measured at 3-6 months were not significantly different from those at 7-12 months. Higher rates of ACC responses were significantly associated with better functional performance. CONCLUSIONS ACCs demonstrated auditory capacity for discrimination in infants by 3-6 months. This capacity was positively related to real-life functional performance. SIGNIFICANCE ACCs can be used to evaluate the effectiveness of amplification and monitor development in aided hearing-impaired infants.
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Affiliation(s)
- Teresa Y C Ching
- National Acoustic Laboratories, Australia; Macquarie School of Education, Macquarie University, Australia; NextSense Institute, Australia; School of Health and Rehabilitation Sciences, University of Queensland, Australia.
| | - Vicky W Zhang
- National Acoustic Laboratories, Australia; Department of Linguistics, Macquarie University, Australia
| | - Ronny Ibrahim
- National Acoustic Laboratories, Australia; Department of Linguistics, Macquarie University, Australia
| | - Fabrice Bardy
- National Acoustic Laboratories, Australia; School of Psychology, University of Auckland, New Zealand
| | - Gary Rance
- Department of Audiology and Speech Pathology, The University of Melbourne, Australia
| | | | - Mridula Sharma
- Department of Linguistics, Macquarie University, Australia
| | - Donella Chisari
- Department of Audiology and Speech Pathology, The University of Melbourne, Australia
| | - Harvey Dillon
- National Acoustic Laboratories, Australia; Department of Linguistics, Macquarie University, Australia; Department of Hearing, University of Manchester, United Kingdom
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The Acoustic Change Complex Compared to Hearing Performance in Unilaterally and Bilaterally Deaf Cochlear Implant Users. Ear Hear 2022; 43:1783-1799. [PMID: 35696186 PMCID: PMC9592183 DOI: 10.1097/aud.0000000000001248] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVES Clinical measures evaluating hearing performance in cochlear implant (CI) users depend on attention and linguistic skills, which limits the evaluation of auditory perception in some patients. The acoustic change complex (ACC), a cortical auditory evoked potential to a sound change, might yield useful objective measures to assess hearing performance and could provide insight in cortical auditory processing. The aim of this study is to examine the ACC in response to frequency changes as an objective measure for hearing performance in CI users. DESIGN Thirteen bilaterally deaf and six single-sided deaf subjects were included, all having used a unilateral CI for at least 1 year. Speech perception was tested with a consonant-vowel-consonant test (+10 dB signal-to-noise ratio) and a digits-in-noise test. Frequency discrimination thresholds were measured at two reference frequencies, using a 3-interval, 2-alternative forced-choice, adaptive staircase procedure. The two reference frequencies were selected using each participant's frequency allocation table and were centered in the frequency band of an electrode that included 500 or 2000 Hz, corresponding to the apical electrode or the middle electrode, respectively. The ACC was evoked with pure tones of the same two reference frequencies with varying frequency increases: within the frequency band of the middle or the apical electrode (+0.25 electrode step), and steps to the center frequency of the first (+1), second (+2), and third (+3) adjacent electrodes. RESULTS Reproducible ACCs were recorded in 17 out of 19 subjects. Most successful recordings were obtained with the largest frequency change (+3 electrode step). Larger frequency changes resulted in shorter N1 latencies and larger N1-P2 amplitudes. In both unilaterally and bilaterally deaf subjects, the N1 latency and N1-P2 amplitude of the CI ears correlated to speech perception as well as frequency discrimination, that is, short latencies and large amplitudes were indicative of better speech perception and better frequency discrimination. No significant differences in ACC latencies or amplitudes were found between the CI ears of the unilaterally and bilaterally deaf subjects, but the CI ears of the unilaterally deaf subjects showed substantially longer latencies and smaller amplitudes than their contralateral normal-hearing ears. CONCLUSIONS The ACC latency and amplitude evoked by tone frequency changes correlate well to frequency discrimination and speech perception capabilities of CI users. For patients unable to reliably perform behavioral tasks, the ACC could be of added value in assessing hearing performance.
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Strahm S, Small SA, Chan S, Tian DY, Sharma M. The Maturation of the Acoustic Change Complex in Response to Iterated Ripple Noise in 'Normal'-Hearing Infants, Toddlers, and Adults. J Am Acad Audiol 2022; 33:301-310. [PMID: 35613945 DOI: 10.1055/a-1862-0198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Infants and toddlers are still being evaluated for their hearing sensitivity but not their auditory-processing skills. Iterated rippled noise (IRN) stimuli require the auditory system to utilize the temporal periodicity and autocorrelate the iterations to perceive pitch. PURPOSE This study investigated the acoustic change complex (ACC) elicited by IRN in "normal"-hearing infants, toddlers, and adults to determine the maturation of cortical processing of IRN stimuli. DESIGN Cortical responses to filtered white noise (onset) concatenated with IRN stimuli (d = 10 milliseconds, gain = 0.7 dB: 4-32 iterations) were recorded in quiet, alert participants. STUDY SAMPLE Participants included 25 infants (2.5-15 months), 27 toddlers (22-59 months), and 8 adults (19-25 years) with "normal" hearing sensitivity. DATA COLLECTION AND ANALYSIS Cortical auditory-evoked responses were recorded for each participant, including the onset response to the noise and an ACC to the transition from noise to IRN. Group differences were assessed using repeated-measures analyses of variance. RESULTS Most infants had a replicable onset (P) response, while only about half had a measurable ACC (PACC) response to the high-saliency IRN condition. Most toddlers had onset responses and showed a P-NACC response to the IRN16 and IRN32 conditions. Most of the toddler group had responses present to the onset and showed a P-NACC response to all IRN conditions. Toddlers and adults showed similar P-NACC amplitudes; however, adults showed an increase in N1ACC amplitude with increase in IRN iterations (i.e., increased salience). CONCLUSION While cortical responses to the percept of sound as determined by the onset response (P) to a stimulus are present in most infants, ACC responses to IRN stimuli are not mature in infancy. Most toddlers as young as 22 months, however, exhibited ACC responses to the IRN stimuli even when the pitch saliency was low (e.g., IRN4). The findings of the current study have implications for future research when investigating maturational effects on ACC and the optimal choice of stimuli.
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Affiliation(s)
- S Strahm
- School of Audiology and Speech Sciences, The University of British Columbia, Vancouver, Canada
| | - S A Small
- School of Audiology and Speech Sciences, The University of British Columbia, Vancouver, Canada
| | - S Chan
- School of Audiology and Speech Sciences, The University of British Columbia, Vancouver, Canada
| | - D Y Tian
- Department of Medicine, The University of Alberta, Edmonton, Canada
| | - M Sharma
- Department of Linguistics and The HEARing Cooperative Research Centre , Macquarie University, Sydney, Australia
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Cone BK, Smith S, Smith DEC. Acoustic Change Complex and Visually Reinforced Infant Speech Discrimination Measures of Vowel Contrast Detection. Ear Hear 2022; 43:531-544. [PMID: 34456301 PMCID: PMC8873241 DOI: 10.1097/aud.0000000000001116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVES To measure the effect of stimulus rate and vowel change direction on the acoustic change complex (ACC) latencies and amplitudes and compare ACC metrics to behavioral measures of vowel contrast detection for infants tested under the age of 1 year. We tested the hypothesis that the direction of spectral energy shift from a vowel change would result in differences in the ACC, owing to the sensitivity of cortical neurons to the direction of frequency change. We evaluated the effect of the stimulus rate (1/s versus 2/s) on the infants' ACC. We evaluated the ACC amplitude ratio's sensitivity (proportion of ACCs present for each change trial) and compared it to perceptual responses obtained using a visually reinforced infant speech discrimination paradigm (VRISD). This report provides normative data from infants for the ACC toward the ultimate goal of developing a clinically useful index of neural capacity for vowel discrimination. DESIGN Twenty-nine infants, nine females, 4.0 to 11.8 months of age, participated. All participants were born at full term and passed their newborn hearing screens. None had risk factors for hearing or neurologic impairment. Cortical auditory evoked potentials were obtained in response to synthesized vowel tokens /a/, /i/, /o/, and /u/ presented at a rate of 1- or 2/s in an oddball stimulus paradigm with a 25% probability of the deviant stimulus. All combinations of vowel tokens were tested at the two rates. The ACC was obtained in response to the deviant stimulus. The infants were also tested for vowel contrast detection using a VRISD paradigm with the same combinations of vowel tokens used for the ACC. The mean age at the time of the ACC test was 5.4 months, while the mean age at the behavioral test was 6.8 months. RESULTS Variations in ACC amplitude and latency occurred as a function of the initial vowel token and the contrast token. However, the hypothesis that the direction of vowel (spectral) change would result in significantly larger change responses for high-to-low spectral changes was not supported. The contrasts with /a/ as the leading vowel of the contrast pair resulted in the largest ACC amplitudes than other conditions. Significant differences in the ACC presence and amplitude were observed as a function of rate, with 2/s resulting in ACCs with the largest amplitude ratios. Latency effects of vowel contrast and rate were present, but not systematic. The ACC amplitude ratio's sensitivity for detecting a vowel contrast was greater for the 2/s rate than the 1/s rate. For an amplitude ratio criterion of ≥1.5, the sensitivity was 93% for ACC component P2-N2 at 2/s, whereas at 1/s sensitivity was 70%. VRISD tests of vowel-contrast detection had a 71% hit and a 21% false-positive rate. Many infants who could not reach performance criteria for VRISD had ACC amplitude ratios of ≥2.0. CONCLUSIONS The ACC for vowel contrasts presented at a rate of 2/s is a robust index of vowel-contrast detection when obtained in typically developing infants under the age of 1 year. The ACC is present in over 90% of infants tested at this rate when an amplitude ratio criterion of ≥1.5 is used to define a response. The amplitude ratio appears to be a sensitive metric for the difference between a control and contrast condition. The ACC can be obtained in infants who do not yet exhibit valid behavioral responses for vowel change contrasts and may be useful for estimating neural capacity for discriminating these sounds.
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Affiliation(s)
- Barbara K. Cone
- Department of Speech, Language and Hearing Sciences, The University of Arizona
| | - Spencer Smith
- Texas Auditory Neuroscience (TexAN) Lab, Department of Speech, Language and Hearing Sciences, The University of Texas at Austin
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Speech token detection and discrimination in individual infants using functional near-infrared spectroscopy. Sci Rep 2021; 11:24006. [PMID: 34907273 PMCID: PMC8671543 DOI: 10.1038/s41598-021-03595-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 11/29/2021] [Indexed: 11/08/2022] Open
Abstract
Speech detection and discrimination ability are important measures of hearing ability that may inform crucial audiological intervention decisions for individuals with a hearing impairment. However, behavioral assessment of speech discrimination can be difficult and inaccurate in infants, prompting the need for an objective measure of speech detection and discrimination ability. In this study, the authors used functional near-infrared spectroscopy (fNIRS) as the objective measure. Twenty-three infants, 2 to 10 months of age participated, all of whom had passed newborn hearing screening or diagnostic audiology testing. They were presented with speech tokens at a comfortable listening level in a natural sleep state using a habituation/dishabituation paradigm. The authors hypothesized that fNIRS responses to speech token detection as well as speech token contrast discrimination could be measured in individual infants. The authors found significant fNIRS responses to speech detection in 87% of tested infants (false positive rate 0%), as well as to speech discrimination in 35% of tested infants (false positive rate 9%). The results show initial promise for the use of fNIRS as an objective clinical tool for measuring infant speech detection and discrimination ability; the authors highlight the further optimizations of test procedures and analysis techniques that would be required to improve accuracy and reliability to levels needed for clinical decision-making.
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Horn D, Walter M, Rubinstein J, Lau BK. Electrophysiological responses to spectral ripple envelope phase inversion in typical hearing 2- to 4-month-olds. PROCEEDINGS OF MEETINGS ON ACOUSTICS. ACOUSTICAL SOCIETY OF AMERICA 2021; 45:050003. [PMID: 35891886 PMCID: PMC9311477 DOI: 10.1121/2.0001558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- David Horn
- University of Washington, Department of Otolaryngology-Head & Neck Surgery
| | - Max Walter
- University of Washington, Department of Otolaryngology-Head & Neck Surgery
| | - Jay Rubinstein
- University of Washington, Department of Otolaryngology-Head & Neck Surgery
| | - Bonnie K. Lau
- University of Washington, Department of Otolaryngology-Head & Neck Surgery
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Ragó A, Varga Z, Garami L, Honbolygó F, Csépe V. The effect of lexical status on prosodic processing in infants learning a fixed stress language. Psychophysiology 2021; 58:e13932. [PMID: 34432306 DOI: 10.1111/psyp.13932] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 11/30/2022]
Abstract
In speech processing, in the first year of life, prosody and phoneme-relevant aspects serve different functions. Recent studies have assumed that the two aspects become integrated at around 9 months of age. The present study investigates the effect of lexical status on stress processing in a fixed stress language. We hypothesize that lexicality modulates stress processing, and where the stress cue is in conflict with the lexical status (legal deviant condition), we will observe differences in age indicating the stage of integration. We tested 69 6 and 10 month-old infants in an acoustic oddball event-related potential paradigm. A frequent word stimulus (baba) and a pseudoword (bebe) were used with legal versus illegal stress. We systematically swapped the standard and deviant roles of the different stress variants in two conditions. In the illegal deviant condition in the case of the word stimulus, the response pattern typical for the pseudoword (an MMR to the absence of the stress cue) was missing. This implies the suppression effect of lexicality. In the legal deviant condition, negative MMR (N-MMR) in the second time window indicated a facilitation effect of lexicality in both age groups. As only the 6-month-olds produced an N-MMR in the first time window, we concluded that in a fixed stress language, integration starts at 6 months but is only completed by the age of 10 months. Our results show that lexical status modulates stress processing at word level in a highly regularly stressed language in which stable, long-term language-specific stress representation exists from early infancy.
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Affiliation(s)
- Anett Ragó
- Institute of Psychology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Zsuzsanna Varga
- Division of Neonatology, Semmelweis University 1st Department of Pediatrics, Budapest, Hungary.,Doctoral School of Psychology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Linda Garami
- Research Centre for Natural Sciences, Brain Imaging Centre, Budapest, Hungary.,Doctoral School of Psychology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Ferenc Honbolygó
- Institute of Psychology, ELTE Eötvös Loránd University, Budapest, Hungary.,Research Centre for Natural Sciences, Brain Imaging Centre, Budapest, Hungary
| | - Valéria Csépe
- Research Centre for Natural Sciences, Brain Imaging Centre, Budapest, Hungary.,Institute of Hungarian and Applied Linguistics, University of Pannonia, Veszprém, Hungary
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Recording Obligatory Cortical Auditory Evoked Potentials in Infants: Quantitative Information on Feasibility and Parent Acceptability. Ear Hear 2021; 41:630-639. [PMID: 31633599 PMCID: PMC7673631 DOI: 10.1097/aud.0000000000000789] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES With the advent of newborn hearing screening and early intervention, there is a growing interest in using supra-threshold obligatory cortical auditory evoked potentials (CAEPs) to complement established pediatric clinical test procedures. The aim of this study was to assess the feasibility, and parent acceptability, of recording infant CAEPs. DESIGN Typically developing infants (n = 104) who had passed newborn hearing screening and whose parents expressed no hearing concerns were recruited. Testing was not possible in 6 infants, leaving 98, age range 5 to 39 weeks (mean age = 21.9, SD = 9.4). Three short duration speech-like stimuli (/m/, /g/, /t/) were presented at 65 dB SPL via a loudspeaker at 0° azimuth. Three criteria were used to assess clinical feasibility: (i) median test duration <30 min, (ii) >90% completion rate in a single test session, and (iii) >90% response detection for each stimulus. We also recorded response amplitude, latency, and CAEP signal to noise ratio. Response amplitudes and residual noise levels were compared for Fpz (n = 56) and Cz (n = 42) noninverting electrode locations. Parental acceptability was based on an 8-item questionnaire (7-point scale, 1 being best). In addition, we explored the patient experience in semistructured telephone interviews with seven families. RESULTS The median time taken to complete 2 runs for 3 stimuli, including preparation, was 27 min (range 17 to 59 min). Of the 104 infants, 98 (94%) were in an appropriate behavioral state for testing. A further 7 became restless during testing and their results were classified as "inconclusive." In the remaining 91 infants, CAEPs were detected in every case with normal bilateral tympanograms. Detection of CAEPs in response to /m/, /g/, and /t/ in these individuals was 86%, 100%, and 92%, respectively. Residual noise levels and CAEP amplitudes were higher for Cz electrode recordings. Mean scores on the acceptability questionnaire ranged from 1.1 to 2.6. Analysis of interviews indicated that parents found CAEP testing to be a positive experience and recognized the benefit of having an assessment procedure that uses conversational level speech stimuli. CONCLUSIONS Test duration, completion rates, and response detection rates met (or were close to) our feasibility targets, and parent acceptability was high. CAEPs have the potential to supplement existing practice in 3- to 9-month olds.
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Uhler K, Hunter S, Gilley PM. Mismatched response predicts behavioral speech discrimination outcomes in infants with hearing loss and normal hearing. INFANCY 2021; 26:327-348. [PMID: 33481354 DOI: 10.1111/infa.12386] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 11/20/2020] [Accepted: 12/17/2020] [Indexed: 01/22/2023]
Abstract
Children with hearing loss (HL) remain at risk for poorer language abilities than normal hearing (NH) children despite targeted interventions; reasons for these differences remain unclear. In NH children, research suggests speech discrimination is related to language outcomes, yet we know little about it in children with HL under the age of 2 years. We utilized a vowel contrast, /a-i/, and a consonant-vowel contrast, /ba-da/, to examine speech discrimination in 47 NH infants and 40 infants with HL. At Mean age =3 months, EEG recorded from 11 scalp electrodes was used to compute the time-frequency mismatched response (TF-MMRSE ) to the contrasts; at Mean age =9 months, behavioral discrimination was assessed using a head turn task. A machine learning (ML) classifier was used to predict behavioral discrimination when given an arbitrary TF-MMRSE as input, achieving accuracies of 73% for exact classification and 92% for classification within a distance of one class. Linear fits revealed a robust relationship regardless of hearing status or speech contrast. TF-MMRSE responses in the delta (1-3.5 Hz), theta (3.5-8 Hz), and alpha (8-12 Hz) bands explained the most variance in behavioral task performance. Our findings demonstrate the feasibility of using TF-MMRSE to predict later behavioral speech discrimination.
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Affiliation(s)
- Kristin Uhler
- Children's Hospital Colorado, University of Colorado, Anschutz School of Medicine, Aurora, CO, USA
| | - Sharon Hunter
- University of Colorado, Anschutz School of Medicine, Aurora, CO, USA
| | - Phillip M Gilley
- Institute of Cognitive Science, University of Colorado, Boulder, Boulder, CO, USA
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