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Bachmann FL, Kulasingham JP, Eskelund K, Enqvist M, Alickovic E, Innes-Brown H. Extending Subcortical EEG Responses to Continuous Speech to the Sound-Field. Trends Hear 2024; 28:23312165241246596. [PMID: 38738341 DOI: 10.1177/23312165241246596] [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] [Indexed: 05/14/2024] Open
Abstract
The auditory brainstem response (ABR) is a valuable clinical tool for objective hearing assessment, which is conventionally detected by averaging neural responses to thousands of short stimuli. Progressing beyond these unnatural stimuli, brainstem responses to continuous speech presented via earphones have been recently detected using linear temporal response functions (TRFs). Here, we extend earlier studies by measuring subcortical responses to continuous speech presented in the sound-field, and assess the amount of data needed to estimate brainstem TRFs. Electroencephalography (EEG) was recorded from 24 normal hearing participants while they listened to clicks and stories presented via earphones and loudspeakers. Subcortical TRFs were computed after accounting for non-linear processing in the auditory periphery by either stimulus rectification or an auditory nerve model. Our results demonstrated that subcortical responses to continuous speech could be reliably measured in the sound-field. TRFs estimated using auditory nerve models outperformed simple rectification, and 16 minutes of data was sufficient for the TRFs of all participants to show clear wave V peaks for both earphones and sound-field stimuli. Subcortical TRFs to continuous speech were highly consistent in both earphone and sound-field conditions, and with click ABRs. However, sound-field TRFs required slightly more data (16 minutes) to achieve clear wave V peaks compared to earphone TRFs (12 minutes), possibly due to effects of room acoustics. By investigating subcortical responses to sound-field speech stimuli, this study lays the groundwork for bringing objective hearing assessment closer to real-life conditions, which may lead to improved hearing evaluations and smart hearing technologies.
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Affiliation(s)
| | - Joshua P Kulasingham
- Automatic Control, Department of Electrical Engineering, Linköping University, Linköping, Sweden
| | | | - Martin Enqvist
- Automatic Control, Department of Electrical Engineering, Linköping University, Linköping, Sweden
| | - Emina Alickovic
- Eriksholm Research Centre, Snekkersten, Denmark
- Automatic Control, Department of Electrical Engineering, Linköping University, Linköping, Sweden
| | - Hamish Innes-Brown
- Eriksholm Research Centre, Snekkersten, Denmark
- Department of Health Technology, Technical University of Denmark, Lyngby, Denmark
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Zapata-Rodriguez V, Laugesen S, Jeong CH, Brunskog J, Harte J. Do Room Acoustics Affect the Amplitude of Sound-Field Auditory Steady-State Responses? Trends Hear 2021; 25:2331216520965029. [PMID: 34551633 PMCID: PMC8474322 DOI: 10.1177/2331216520965029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The sound-field auditory steady-state response (ASSR) is a promising measure for
the objective validation of hearing-aid fitting in patients who are unable to
respond to behavioral testing reliably. To record the sound-field ASSR, the
stimulus is reproduced through a loudspeaker placed in front of the patient.
However, the reverberation and background noise of the measurement room could
reduce the stimulus modulation used for eliciting the ASSR. As the ASSR level is
heavily dependent on the stimulus modulation, any reduction due to room
acoustics could affect the clinical viability of sound-field ASSR testing. This
study investigated the effect of room acoustics on the level and detection rate
of sound-field ASSR. The study also analyzed whether early decay time and an
auditory-inspired relative modulation power model could be used to predict the
changes in the recorded ASSR in rooms. A monaural auralization approach was used
to measure sound-field ASSR via insert earphones. ASSR was measured for 15
normal-hearing adult subjects using narrow-band CE-Chirps® centered at the
octave bands of 500, 1000, 2000, and 4000 Hz. These stimuli were convolved with
simulated impulse responses of three rooms inspired by audiological testing
rooms. The results showed a significant reduction of the ASSR level for the room
conditions compared with the reference anechoic condition. Despite this
reduction, the detection rates for the first harmonics of the ASSR were
unaffected when sufficiently long recordings (up to 6 min) were made.
Furthermore, the early decay time and relative modulation power appear to be
useful predictors of the ASSR level in the measurement rooms.
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Affiliation(s)
- Valentina Zapata-Rodriguez
- Interacoustics Research Unit, Lyngby, Denmark.,Department of Electrical Engineering, Technical University of Denmark, Lyngby, Denmark
| | | | - Cheol-Ho Jeong
- Department of Electrical Engineering, Technical University of Denmark, Lyngby, Denmark
| | - Jonas Brunskog
- Department of Electrical Engineering, Technical University of Denmark, Lyngby, Denmark
| | - James Harte
- Interacoustics Research Unit, Lyngby, Denmark
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Soleimani M, Rouhbakhsh N, Rahbar N. Towards early intervention of hearing instruments using cortical auditory evoked potentials (CAEPs): A systematic review. Int J Pediatr Otorhinolaryngol 2021; 144:110698. [PMID: 33839460 DOI: 10.1016/j.ijporl.2021.110698] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 02/14/2021] [Accepted: 03/24/2021] [Indexed: 10/21/2022]
Abstract
As a result of newborn hearing screening, hearing aids are usually prescribed and fitted by 2-3 months of age. However, the assessment data used for prescribing hearing aids in infants and toddlers are limited in quality and quantity. There is great interest in finding appropriate physiological measures that can be help to facilitate and improve the management process of hearing impaired children. It seems that cortical auditory evoked potentials (CAEPs) can provide information before it is possible to obtain reliable information from behavioral assessment procedures. This article will review the studies conducted in this area during the past15 years to determine the advantages, disadvantages and future research areas of CAEPs as an objective method in the management of hearing impaired children.
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Affiliation(s)
- Marjan Soleimani
- Department of Audiology, School of Rehabilitation, Tehran University of Medical Sciences (TUMS), Tehran, Iran.
| | - Nematollah Rouhbakhsh
- Department of Audiology, School of Rehabilitation, Tehran University of Medical Sciences (TUMS), Tehran, Iran.
| | - Nariman Rahbar
- Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences (IUMS), Tehran, Iran.
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Tufatulin GS. [The optimal stimulation parameters of the free-field auditory steady-state responses]. Vestn Otorinolaringol 2020; 85:18-23. [PMID: 33140928 DOI: 10.17116/otorino20208505118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
UNLABELLED Studies of the recent years are devoted to using the auditory steady-state responses (ASSR) as an evaluation method of amplification outcomes. In this case stimulation is performed in the sound field via loudspeaker with a hearing aid (HA) in patient's ear. GOAL Estimation the optimal stimulation parameters of ASSR in free field, which provide maximum correlation with behavioral thresholds. MATERIALS AND METHODS 26 subjects were included in the study: 10 with normal hearing (4 adults and 6 children) and 16 children (1-16 years old) with sensorineural hearing loss (SNHL). Aided and unaided ASSR thresholds were compared with corresponding behavioral thresholds (BT). All recordings were conducted in free sound field. We used mono-frequency stimulation method at 500-4000 Hz career frequencies. Modulation frequency was set as 40 Hz. Types of stimuli modulation: AM/FM modulation, exponential modulation (AM2), three carrier frequencies and modulated Chirp-tone (Chirp). RESULTS In normal hearing subjects the difference between ASSR and BT varied from 0 dB to 35 dB, and the significant correlation between them was observed (p<0.05). The maximum difference between ASSR and BT in children with SNHL was at 500 Hz (15.6±4.3 dB), minimum - at 2 and 4 kHz (8±2.9 dB and 7±3 dB respectively). In aided condition maximum difference was detected at 500 Hz (10.2±3.8 dB), minimum - at 1 and 2 kHz (7.8±2.8 and 7.3±3.1 dB respectively). We got significantly less difference between ASSR and BT in all test conditions using following types of stimuli: at 500 Hz and 1000 Hz - AM2 (p<0.01); at 2 and 4 kHz - Chirp (p<0.05 and p<0.01 respectively). Thereby, free field ASSR might be used as an objective method of evaluation the amplification outcomes in children with SNHL.
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Affiliation(s)
- G Sh Tufatulin
- Center of the Pediatric Audiology, St. Petersburg, Russia
- North-Western State Medical University named after I.I. Mechnikov, St. Petersburg, Russia
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Shabana MI, Selim MH, Abd El-Latif SM, Hamdy MM, El-Gohary MM. Comparative study of auditory brainstem response and auditory steady-state response as an objective measure for hearing aid verification. HEARING BALANCE AND COMMUNICATION 2019. [DOI: 10.1080/21695717.2018.1542881] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
| | - M. H. Selim
- Faculty of Medicine, Cairo University, Cairo, Egypt
| | | | - M. M. Hamdy
- bAudiology Unit, Hearing and Speech Institute, Cairo, Egypt
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Karawani H, Attias J, Shemesh R, Nageris B. Evaluation of noise-induced hearing loss by auditory steady-state and auditory brainstem-evoked responses. Clin Otolaryngol 2016; 40:672-81. [PMID: 25919036 DOI: 10.1111/coa.12448] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/21/2015] [Indexed: 11/27/2022]
Abstract
OBJECTIVES Noise-induced hearing loss (NIHL) may result from occupational noise exposures and is considered as an 'Occupational Disease'; therefore, it is compensable. To verify the existence and severity of the work-related hearing loss, there is a need of an objective, reliable auditory measure in cases of arbitration of financial disputes to resolve any medicolegal aspects. The objective of the study was to compare between the ABR and ASSR for predicting the behavioural threshold in subjects with normal hearing or NIHL. DESIGN The study included 82 subjects regularly exposed to high levels of occupational noise, with normal hearing and NIHL. ABR to clicks and to tone bursts were recorded followed by multiple-frequency ASSR. Physiological and behavioural thresholds were compared for specific frequencies (1000, 2000 Hz) and average of high-frequency range (2000 and 4000 Hz). In addition, Pearson correlations and the specificity and sensitivity of each measure were also calculated using receiver operating characteristic (ROC) curves. RESULTS In the NIHL group, there was a significantly smaller difference between the behavioural threshold and click-ABR than the ASSR in high-frequency range. Pearson correlations were significantly higher for click-ABR. Analysis of specific frequencies yielded a smaller difference between behavioural and ASSR than tone-burst-ABR thresholds, with a slightly better correlation for ASSR than tone-burst-ABR. Higher sensitivity but lower specificity was suggested for ASSR than ABR. CONCLUSIONS ASSR is associated with high-frequency specificity, shorter test sessions and good correlations with behavioural thresholds, making it a potentially better measure than ABR for predicting audiograms in subjects with NIHL. These findings have diagnostic implications, especially in cases of workers' compensation when subjects may be uncooperative.
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Affiliation(s)
- H Karawani
- Department of Communication Sciences & Disorders, University of Haifa, Haifa, Israel.,Speech and Hearing center, Otolaryngology and Neck and Head Surgery Department, Rambam Health Care Campus, Haifa, Israel
| | - J Attias
- Department of Communication Sciences & Disorders, University of Haifa, Haifa, Israel.,Institute for Audiology and Clinical Neurophysiology, Schneider Children's Medical Center of Israel, Petach Tikva, Israel
| | - R Shemesh
- Department of Communication Sciences & Disorders, University of Haifa, Haifa, Israel
| | - B Nageris
- Department of Otolaryngology, Head and Neck Surgery, Rabin Medical Center, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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Tlumak AI, Durrant JD, Delgado RE. The Effect of Stimulus Intensity and Carrier Frequency on Auditory Middle- and Long-Latency Evoked Potentials Using a Steady-State-Response Approach. Am J Audiol 2016; 25:62-74. [PMID: 26999323 DOI: 10.1044/2016_aja-15-0061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 12/28/2015] [Indexed: 11/09/2022] Open
Abstract
PURPOSE The purpose of this study was to measure magnitude changes of auditory steady-state responses (ASSRs) and respective transient middle- and long-latency responses as a function of stimulus intensity and carrier frequency. The literature lacks clear consensus, including relationship to loudness. METHOD A cohort of 48 adults with normal hearing was examined from a companion study (Tlumak, Durrant, & Delgado, 2015) on effects of aging. ASSRs were elicited by repeated tone-burst stimuli presented at rates of 40 and 0.75 Hz at 3 frequencies and 5 levels of stimulus intensity. The design also permitted scrutiny of any gender bias to the results. RESULTS Similar to derived transient response findings, ASSR magnitude (harmonic sum) systematically increased with intensity. Input-output function only at 0.75 Hz approximated a log-log linear function. However, slopes fell well below that of doubling of loudness per 10 dB SPL. Results failed to demonstrate significance as a function of carrier frequency and gender for both repetition rates. CONCLUSION Effects of stimulus intensity, carrier frequency, and gender on ASSRs were similar to those of their transient counterparts. Findings remain disappointing for objective loudness estimation. Results suggest only a clear linkage to the long-latency response and the 0.75-Hz magnitude but require careful consideration of limitations/underlying mechanisms when measuring loudness-related effects.
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Sardari S, Jafari Z, Haghani H, Talebi H. Hearing aid validation based on 40 Hz auditory steady-state response thresholds. Hear Res 2015; 330:134-41. [PMID: 26385486 DOI: 10.1016/j.heares.2015.09.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 08/30/2015] [Accepted: 09/08/2015] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND AIM Aided thresholds can be used for prediction of success of hearing aids and to choose between hearing aids and cochlear implants. This study aimed to compare characteristics of aided and unaided auditory steady-state responses (ASSRs). METHODS A total of 30 moderate to profoundly hearing-impaired subjects participated in this study. The subjects underwent acoustic immittance, behavioral audiometry, and ASSR with the modulation rate of 40 Hz, first without a hearing aid and then with a hearing aid. Sixteen people with normal hearing and 17 people with severe hearing loss were included in biological calibration of the sound field. RESULTS There was a significant difference between unaided behavioral and ASSR thresholds in all test frequencies (mean difference of unaided behavioral ASSR thresholds: 6.19 dB; P = 0.02 at 500 Hz, P < 0.001 at 1000 and 2000 Hz, and P = 0.02 for 4000 Hz). There was also a significant difference between aided behavioral and ASSR thresholds at 1000 and 2000 Hz (P < 0.001) but not at 500 (P = 0.14) and 4000 (P = 0.23) Hz (mean difference of behavioral ASSR thresholds was 4.33 dB). Despite observing any unaided responses, aided thresholds could be recorded in some severe to profoundly hearing-impaired subjects. The number of recordable thresholds was directly related to speech clarity and speech-reading ability. Multi-frequency stimulation elevated the ASSR threshold, especially for the higher frequencies and in the aided condition. CONCLUSION Functional and ASSR gains show less difference than threshold data. Therefore, comparing gains instead of thresholds is more accurate for validation of hearing aids. The probability of success of hearing aids appears to be poor if ASSRs (especially aided ones) cannot be recorded. If special care is taken in the fitting of hearing aids and the testing conditions, aided ASSR testing could be a useful tool for validation of hearing aids and the cochlear implant decision-making process.
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Affiliation(s)
- Sara Sardari
- Department of Audiology, Faculty of Rehabilitation, Tehran University of Medical Sciences, Iran.
| | - Zahra Jafari
- Department of Basic Sciences in Rehabilitation, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran; Canadian Center for Behavioral Neuroscience (CCBN), Lethbridge University, Lethbridge, Alberta, Canada.
| | - Hamid Haghani
- Department of Statistics and Mathematics, Faculty of Management, Tehran University of Medical Sciences, Iran
| | - Hossain Talebi
- Department of Audiology, Faculty of Rehabilitation, Isfahan University of Medical Sciences, Isfahan, Iran
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Bakhos D, Vitaux H, Villeneuve A, Kim S, Lescanne E, Pigeon V, Aoustin JM, Bordure P, Galvin J. The effect of the transducers on paediatric thresholds estimated with auditory steady-state responses. Eur Arch Otorhinolaryngol 2015; 273:2019-26. [PMID: 26329899 DOI: 10.1007/s00405-015-3761-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 08/21/2015] [Indexed: 11/29/2022]
Abstract
The objective of this study was to investigate the usefulness of auditory steady-state responses (ASSRs) for estimating hearing thresholds in young children, compared with behavioural thresholds. The second objective was to investigate ASSR thresholds obtained with insert earphones versus supra-aural headphones to determine which transducer produces ASSR thresholds most similar to behavioural thresholds measured with supra-aural headphones. This retrospective study included 29 participants (58 ears): 12 children (24 ears) in the insert group and 17 children (34 ears) in the supra-aural group. No general anaesthesia was used. For both groups, there was a strong correlation between behavioural and ASSR thresholds, with a stronger correlation for the insert group. When behavioural thresholds are difficult to obtain, ASSR may be a useful objective measure that can be combined with other audiometric procedures to estimate hearing thresholds and to determine appropriate auditory rehabilitation approaches.
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Affiliation(s)
- D Bakhos
- Service d'ORL et Chirurgie Cervico-Faciale, CHRU de Tours, Tours, France. .,ENT Department, Université François-Rabelais de Tours, CHRU de Tours, UMR-S930, 2 Boulevard Tonnellé, 37000, Tours, France.
| | - H Vitaux
- Service d'ORL et Chirurgie Cervico-Faciale, CHU de Nantes, Nantes, France
| | - A Villeneuve
- Service d'ORL et Chirurgie Cervico-Faciale, CHRU de Tours, Tours, France
| | - S Kim
- Service d'ORL et Chirurgie Cervico-Faciale, CHRU de Tours, Tours, France.,ENT Department, Université François-Rabelais de Tours, CHRU de Tours, UMR-S930, 2 Boulevard Tonnellé, 37000, Tours, France
| | - E Lescanne
- Service d'ORL et Chirurgie Cervico-Faciale, CHRU de Tours, Tours, France.,ENT Department, Université François-Rabelais de Tours, CHRU de Tours, UMR-S930, 2 Boulevard Tonnellé, 37000, Tours, France
| | - V Pigeon
- Service d'ORL et Chirurgie Cervico-Faciale, CHRU de Tours, Tours, France
| | - J M Aoustin
- Service d'ORL et Chirurgie Cervico-Faciale, CHRU de Tours, Tours, France
| | - P Bordure
- Service d'ORL et Chirurgie Cervico-Faciale, CHU de Nantes, Nantes, France.,Université de Nantes, CHU de Nantes, Nantes, France
| | - J Galvin
- Department of Head and Neck Surgery, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
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Abstract
There is currently a strong interest among both audiologists and hearing researchers to find a physiological measure that can be used as a marker of how amplified sounds are processed by the brain (i.e., hearing aid fitting) or how the brain changes with exposure to amplified sounds (i.e., hearing aid acclimatization). Currently, auditory evoked potentials are used, or proposed to be used, for both of these purposes to some degree. It is clear from the literature that some of these uses are potentially useful clinically while others are quite problematic. The current state of aided cortical auditory evoked potentials will be discussed relative to their application to hearing aid fitting/verification and in understanding hearing aid acclimatization. Future areas of promise as well as current gaps in the literature will also be addressed.
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Affiliation(s)
- Curtis J Billings
- National Center for Rehabilitative Auditory Research, Portland VA Medical Center, Portland, OR, Department of Otolaryngology/Head & Neck Surgery, Oregon Health & Science University, Portland, OR
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