The N1 Response and Its Applications

Hyde, M. L.

doi:10.1159/000259253

Cited by 198 publications

(181 citation statements)

References 65 publications

(83 reference statements)

Supporting

Mentioning

165

Contrasting

Unclassified

Order By: Relevance

“…N1 is known to be related to the audibility of the stimulus. It increases linearly in amplitude with increasing intensity reaching saturation only at relatively high presentation levels (Pfefferbaum et al 1979;Hyde 1997). Whereas N1 amplitudes were larger in the YNH group with noise in both attention conditions, they decreased in the EHI subjects, regardless of whether they ignored or attended to the stimuli (Fig.…”

Section: Effects Of Noisementioning

confidence: 94%

Effects of Age, Age-Related Hearing Loss, and Contralateral Cafeteria Noise on the Discrimination of Small Frequency Changes: Psychoacoustic and Electrophysiological Measures

Bertoli

Smurzyński

Probst

2005

JARO

View full text Add to dashboard Cite

The aim of the study was to examine central auditory processes compromised by age, age-related hearing loss, and the presentation of a distracting cafeteria noise using auditory event-related potentials (ERPs). In addition, the relation of ERPs to behavioral measures of discrimination was investigated. Three groups of subjects participated: young normal hearing, elderly subjects with normal hearing for their age, and elderly hearing-impaired subjects. Psychoacoustic frequency discrimination thresholds for a 1000-Hz pure tone were determined in quiet and in the presence of a contralateral cafeteria noise. To elicit ERPs, small frequency contrasts were presented with and without noise under unattended and attended conditions. In the attended condition, behavioral measures of dS detectability and reaction times were also obtained. Noise affected all measures of behavioral frequency discrimination significantly. Except N1, all ERP components in the standard and difference waveforms decreased significantly in amplitude and increased in latency to the same degree in all three subject groups, arguing against a specific age-related sensitivity to the effects of contralateral background noise. For N1 amplitude, the effect of noise was different in the three subject groups, with a complex interaction of age, hearing loss, and attention. Behavioral frequency discrimination was not affected by age but deteriorated significantly in the elderly subjects with hearing loss. In the electrophysiological test, age-related changes occurred at various levels. The most prominent finding in the response to the standard stimuli was a sustained negativity (N2) following P2 in the young subjects that was absent in the elderly, possibly indicating a deficit in the inhibition of irrelevant information processing. In the attended difference waveform, significantly larger N2b and smaller P3b amplitudes and longer N2b and P3b latencies were observed in the elderly indicating different processing strategies. The pronounced agerelated changes in the later cognitive components suggest that the discrimination of difficult contrasts, although behaviorally maintained, becomes more effortful in the elderly.

show abstract

Section: Effects Of Noisementioning

confidence: 94%

Effects of Age, Age-Related Hearing Loss, and Contralateral Cafeteria Noise on the Discrimination of Small Frequency Changes: Psychoacoustic and Electrophysiological Measures

Bertoli

Smurzyński

Probst

2005

JARO

View full text Add to dashboard Cite

show abstract

“…Because the N1 wave is driven primarily by the acoustics of the evoking stimulus (Naatanen and Picton 1987;Hyde 1997), it may be the ideal wave to demonstrate the acoustically driven effects of SNR in these young normal-hearing participants. It is possible that the good prediction characteristics of N1 are population specific.…”

Section: Fig 6 Regression Coefficients For Eachmentioning

confidence: 99%

Predicting Perception in Noise Using Cortical Auditory Evoked Potentials

Billings

McMillan

Penman

et al. 2013

JARO

View full text Add to dashboard Cite

Speech perception in background noise is a common challenge across individuals and health conditions (e.g., hearing impairment, aging, etc.). Both behavioral and physiological measures have been used to understand the important factors that contribute to perception-in-noise abilities. The addition of a physiological measure provides additional information about signal-in-noise encoding in the auditory system and may be useful in clarifying some of the variability in perception-in-noise abilities across individuals. Fifteen young normal-hearing individuals were tested using both electrophysiology and behavioral methods as a means to determine (1) the effects of signal-tonoise ratio (SNR) and signal level and (2) how well cortical auditory evoked potentials (CAEPs) can predict perception in noise. Three correlation/regression approaches were used to determine how well CAEPs predicted behavior. Main effects of SNR were found for both electrophysiology and speech perception measures, while signal level effects were found generally only for speech testing. These results demonstrate that when signals are presented in noise, sensitivity to SNR cues obscures any encoding of signal level cues. Electrophysiology and behavioral measures were strongly correlated. The best physiological predictors (e.g., latency, amplitude, and area of CAEP waves) of behavior (SNR at which 50 % of the sentence is understood) were N1 latency and N1 amplitude measures. In addition, behavior was best predicted by the 70-dB signal/5-dB SNR CAEP condition. It will be important in future studies to determine the relationship of electrophysiology and behavior in populations who experience difficulty understanding speech in noise such as those with hearing impairment or age-related deficits.

show abstract

“…N 1 has been suggested to signal the detection of acoustic change in the environment (Hyde, 1997). Change is defined as a deviation from a preceding constant or steady state with particular temporal characteristics.…”

Section: N-complex and Acoustic Changementioning

confidence: 99%

The N1 complex to gaps in noise: Effects of preceding noise duration and intensity

Pratt

Starr

Michalewski

et al. 2007

Clinical Neurophysiology

View full text Add to dashboard Cite

The N1 complex to gaps in noise: Effects of preceding noise duration and intensity AbstractObjective: To study the effects of duration and intensity of noise that precedes gaps in noise on the N-Complex (N 1a and N 1b ) of EventRelated Potentials (ERPs) to the gaps. Methods: ERPs were recorded from 13 normal subjects in response to 20 ms gaps in 2-4.5 s segments of binaural white noise. Within each segment, the gaps appeared after 500, 1500, 2500 or 4000 ms of noise. Noise intensity was either 75, 60 or 45 dBnHL. Analysis included waveform peak measurements and intracranial source current density estimations, as well as statistical assessment of the effects of pre-gap noise duration and intensity on N 1a and N 1b and their estimated intracranial source activity. Results: The N-Complex was detected at about 100 ms under all stimulus conditions. Latencies of N 1a (at 90 ms) and N 1b (at 150 ms) were significantly affected by duration of the preceding noise. Both their amplitudes and the latency of N 1b were affected by the preceding noise intensity. Source current density was most prominent, under all stimulus conditions, in the vicinity of the temporo-parietal junction, with the first peak (N 1a ) lateralized to the left hemisphere and the second peak (N 1b ) -to the right. Additional sources with lower current density were more anterior, with a single peak spanning the duration of the N-Complex. Conclusions: The N 1a and N 1b of the N-Complex of the ERPs to gaps in noise are affected by both duration and intensity of the pre-gap noise. The minimum noise duration required for the appearance of a double-peaked N-Complex is just under 500 ms, depending on noise intensity. N 1a and N 1b of the N-Complex are generated predominantly in opposite temporo-parietal brain areas: N 1a on the left and N 1b on the right. Significance: Duration and intensity interact to define the dual peaked N-Complex, signaling the cessation of an ongoing sound.

show abstract

The N1 Response and Its Applications

Cited by 198 publications

References 65 publications

Effects of Age, Age-Related Hearing Loss, and Contralateral Cafeteria Noise on the Discrimination of Small Frequency Changes: Psychoacoustic and Electrophysiological Measures

Effects of Age, Age-Related Hearing Loss, and Contralateral Cafeteria Noise on the Discrimination of Small Frequency Changes: Psychoacoustic and Electrophysiological Measures

Predicting Perception in Noise Using Cortical Auditory Evoked Potentials

The N1 complex to gaps in noise: Effects of preceding noise duration and intensity

Contact Info

Product

Resources

About