Frequency-Specific Audiometry Using Steady-State Responses

Lins, Otávio Gomes; Picton, Terence W.; Boucher, Brigitte L.; Durieux‐Smith, Andrée; Champagne, Sandra C.; Moran, Linda M.; Pérez-Abalo, María C.; Martin, Vivian; Savio, Guillermo

doi:10.1097/00003446-199604000-00001

Cited by 308 publications

(352 citation statements)

References 31 publications

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“…A fast Fourier transform (FFT) was used to calculate the complex frequency spectrum, with a resulting frequency resolution of 0.04 Hz for sweeps consisting of 64 epochs. Response amplitude and phase were obtained from the corresponding FFT bin, and the presence of a neural response was determined with an F test (Lins et al 1996) relative to the noise at adjacent frequencies. The noise estimate was calculated from 120 adjacent frequency bins, i.e., about 3 Hz below and above the pulse rate of the stimulus.…”

Section: Response Measurementsmentioning

confidence: 99%

Electrically Evoked Auditory Steady State Responses in Cochlear Implant Users

Hofmann

Wouters

2009

JARO

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Auditory steady state responses are neural potentials in response to repeated auditory stimuli. This study shows that electrically evoked auditory steady state responses (EASSRs) to low-rate pulse trains can be reliably recorded by electrodes placed on the scalp of a cochlear implant (CI) user and separated from the artifacts generated by the electrical stimulation. Response properties are described, and the predictive value of EASSRs for behaviorally hearing thresholds is analyzed. For six users of a Cochlear Nucleus CI, EASSRs to symmetric biphasic pulse trains with rates between 35 and 47 Hz were recorded with seven scalp electrodes. The influence of various stimulus parameters was assessed: pulse rate, stimulus intensity, monopolar or bipolar stimulation mode, and presentation of either one pulse train on one electrode or interleaved pulse trains with different pulse rates on multiple electrodes. To compensate for the electrical artifacts caused by the stimulus pulses and radio frequency transmission, different methods of artifact reduction were employed. The validity of the recorded responses was confirmed by recording on-off responses, determination of response latency across the measured pulse rates, and comparison of amplitude growth of stimulus artifact and response amplitude. For stimulation in the 40 Hz range, response latencies of 35.6 ms (SD = 5.3 ms) were obtained. Responses to multiple simultaneous stimuli on different electrodes can be evoked, and the electrophysiological thresholds determined from EASSR amplitude growth in the 40 Hz range correlate well with behaviorally determined threshold levels for pulse rates of 41 Hz.

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Section: Response Measurementsmentioning

confidence: 99%

Electrically Evoked Auditory Steady State Responses in Cochlear Implant Users

Hofmann

Wouters

2009

JARO

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“…Although less used in clinical settings due to increased testing time, tone burst stimuli are very useful because it is frequency specific, and therefore can be used to assess low, middle, and high frequencies 3 . A similar advantage may be attained with the auditory steady-state response (ASSR), in which continuous, amplitude and/or frequency modulated tones evoke electrophysiologic responses that make possible a detailed and objective evaluation of hearing 4 . Many researchers in this area have become interested in ASSR and tone burst ABR testing; these are promising tests, about which there is no consensus as to which is the best and fastest for clinical use.…”

Section: Introductionmentioning

confidence: 99%

Auditory evoked potentials in premature and full-term infants

Porto¹,

Azevedo²,

Gil³

2011

Braz. j. otorhinolaryngol. (Impr.)

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Accurat e information about type, degree, and configuration of hearing loss are necessary for successful audiological early interventions. Auditory brainstem response with tone burst stimuli (TB ABR) and auditory steady-state response (ASSR) exams provide this information. Aim:To analyze the clinical applicability of TB ABR and ASSR at 2 kHz in infants, comparing responses in full-term and premature neonates. Material and Method:The study was cross-sectional, clinical and experimental. Subjects consisted of 17 premature infants and 19 full-term infants. TB ABR and ASSR exams at 2000 Hz were done during natural sleep. Results:The electrophysiological minimum response obtained with TB ABR was 32.4 dBnHL (52.4 dBSPL); the ASSR minimum was 13.8 dBHL (26.4 dBSPL). The exams required 21.1 min and 22 min, respectively. Premature and full-term infant responses showed no statistically significant differences, except for auditory steady-state response duration. Conclusions:Both exams have clinical applicability at 2 kHz in infants, with 20 min of duration, on average. In general, there are no differences between premature and full-term individuals. Braz J Otorhinolaryngol. 2011;77(5):622-7. BJORL ORIGINAL ARTICLE

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“…Various hypotheses had been suggested to explain the underlying mechanism of this finding. Lins et al [14] stated that stimulation at lower frequencies affects an extensive area of the basilar membrane because the time required for waves to travel to the apical region of the cochlea is longer and there might be a delayed jitter between receptors and stimulations. The other hypothesis is the immature neural synchronization in low-frequency responses [15] .…”

Section: Discussionmentioning

confidence: 99%

A Comparison of Thresholds of Auditory Steady-State Response and Auditory Brainstem Response in Healthy Term Babies

Çelik

Eskıızmır²,

Uz³

2016

Int Adv Otol

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Original Article INTRODUCTIONHearing impairment is a crucial health problem in childhood. Hearing loss is detected in 1-6 of every 1000 live births [1] . In infants, early detection of hearing impairment is essential because of its detrimental effects on speech and language development [2] . Thereby, language, speech, and cognitive functions can be improved using hearing aids or cochlear or brainstem implants [3] .For children with hearing loss, the period around 6 months of age is critical for therapy using hearing aids in order to maximize speech and language development [4] . Today, various audiological test batteries are used for the detection of hearing impairment. Unfortunately, behavioral hearing testing, also called visual reinforcement audiometry, is not reliable before 6 months of age [5] . In infants, auditory brainstem responses (ABRs) and otoacoustic emissions (OAEs) are the main audiological tests for the detection of hearing impairments worldwide [6] . However, both audiological tests have some advantages and disadvantages. As a matter of fact, OAE is a quick test to determine whether hearing is normal or abnormal, whereas ABR provides an assessment of the level of hearing loss [6] . Auditory steady-state response (ASSR) is an alternative objective audiometric test for the detection of hearing loss in neonates, infants, and adults. It has several advantages: (i) the results at each frequency of stimulation can be automatically detected, (ii) there is no need for audiologists to identify the peaks, and (iii) it is easy to apply [7] . Moreover, unlike screening OAE, ASSR can evaluate the frequency-specific responses [8] .Recently, several clinical studies have evaluated the role of ASSR in for the detection of hearing impairment among infants. The aim of this study was to assess the effectiveness of ASSR, determine the cut-off values for each frequency, and detect the best correlated frequencies when compared with the ABR thresholds. 277 A Comparison of Thresholds of Auditory Steady-State Response and Auditory Brainstem Response in Healthy Term Babies OBJECTIVE:The goal of this study was to assess the effectiveness of auditory steady-state response (ASSR), determine the cut-off values for each frequency, and detect the best correlated frequencies when compared with the auditory brainstem response (ABR) thresholds in term babies under the age of 12 months. MATERIALS and METHODS:In total, 88 term babies with a mean age of 2.98 (1-11) months (174 ears) underwent ASSR and ABR tests. The ASSR thresholds for the frequencies of 500, 1000, 2000, and 4000 Hz were compared with the hearing level of the ABR thresholds. In the ABR test, a cutoff value of 30 dB nHL was selected for normal hearing. In addition, the best correlation between the ABR and ASSR thresholds and the estimated cut-off thresholds of ASSR for each of the abovementioned frequencies were obtained. RESULTS:In total, 135 ears had values indicating normal hearing ability and 39 ears had hearing loss according to the ABR thresholds. Although stat...

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Frequency-Specific Audiometry Using Steady-State Responses

Abstract: Steady-state responses to tone amplitude-modulated at 75 to 110 Hz can be used for frequency-specific objective audiometry. The multiple-stimulus technique allows thresholds to be estimated for eight different stimuli at the same time.

Cited by 308 publications

References 31 publications

Electrically Evoked Auditory Steady State Responses in Cochlear Implant Users

Electrically Evoked Auditory Steady State Responses in Cochlear Implant Users

Auditory evoked potentials in premature and full-term infants

A Comparison of Thresholds of Auditory Steady-State Response and Auditory Brainstem Response in Healthy Term Babies

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