scholarly journals Development of the auditory evoked potential to amplitude rise time and rate of formant transition of speech sounds

2013 ◽  
Author(s):  
Antoine Shahin ◽  
Allen Carpenter
Keyword(s):  
Rise Time ◽  
Evoked Potential ◽  
Auditory Evoked Potential ◽  
Speech Sounds ◽  
Formant Transition

scholarly journals Auditory Evoked Potential Patterns to Voiced and Voiceless Speech Sounds in Adult Developmental Dyslexics with Persistent Deficits

2005 ◽  
Vol 15 (10) ◽  
pp. 1524-1534 ◽  
Author(s):  
K. Giraud ◽  
J.F. Démonet ◽  
M. Habib ◽  
P. Marquis ◽  
P. Chauvel ◽  
...  
Keyword(s):  
Evoked Potential ◽  
Auditory Evoked Potential ◽  
Speech Sounds

scholarly journals Cortical Auditory Evoked Potential: evaluation of speech detection in adult hearing aid users

CoDAS ◽  
2014 ◽  
Vol 26 (5) ◽  
pp. 367-373 ◽  
Author(s):  
Alessandra Spada Durante ◽  
Margarita Bernal Wieselberg ◽  
Sheila Carvalho ◽  
Nayara Costa ◽  
Beatriz Pucci ◽  
...  
Keyword(s):  
Hearing Aids ◽  
Evoked Potential ◽  
Free Field ◽  
Sound Field ◽  
Automatic Detection ◽  
Cortical Response ◽  
Auditory Evoked Potential ◽  
Speech Sounds ◽  
Speech Detection ◽  
Cortical Auditory Evoked Potential

Purpose:To analyze the presence of auditory cortical potential and its correlation with psychoacoustic detection of speech sounds as well as the latency of the P1, N1 e P2 components presented in free field in hearing impaired adults with and without amplification.Methods:We evaluated 22 adults with moderate to severe symmetrical bilateral sensorineural hearing loss, regular users of bilateral hearing aids. Speech sounds of low (/m/), medium (/g/) and high (/t/) frequencies were presented in sound field in decreasing intensities of 75, 65 and of 55 dBSPL in free field with and without hearing aids. The used equipment performs automatic statistical detection of the presence of response; forthermore, the latencies of waves P1, N1 e P2 were labeled and the psychoacoustic perception was registered.Results:The results demonstrated the increased presence of cortical response with hearing aids. We observed the correlation between psychoacoustic perception and automatic detection of 91% for the sounds /g/ and /t/ and ranged from 73 to 86% for the sound /m/. The averages of latencies P1-P2-N1 decreased with both increasing intensity and the use of hearing aids for the three sounds. The differences were significant for the sounds /g/ and /t/ in comparison with and without hearing aids.Conclusion:There was increase in the presence of cortical auditory evoked potential with hearing aids. Automatic detection of cortical response provided with hearing aids showed 91% agreement with the psychoacoustic perception of the speech signal. In the analysis of latency measures of the P1, N1 and P2 components, it was observed a decrease with the increase of the signal intensity and the use of amplification for the three speech stimuli /m/, /g/ and /t/.

Effects of Signal Duration and Rise Time on the Auditory Evoked Potential

1968 ◽  
Vol 11 (2) ◽  
pp. 301-306 ◽  
Author(s):  
Paul H. Skinner ◽  
Howard C. Jones
Keyword(s):  
Rise Time ◽  
Temporal Summation ◽  
Evoked Potential ◽  
Auditory Evoked Potential ◽  
Signal Duration ◽  
Wave Form ◽  
Evoked Responses ◽  
Clear Trend ◽  
Computer Technique ◽  
Auditory Responses

Summing computer technique was used to study the effects of signal duration and rise time on evoked auditory responses of 40 adult subjects. An additional objective was to determine whether signal duration for short signals up to 150 msec would reflect temporal summation through amplitude and latency changes in the wave form of evoked potentials. In the experiment on signal-duration, 1000 Hz tones were presented at near threshold levels (10 or 15 dB SL) to maximize the probability of observing the possible effects of temporal summation. In the second experiment different rise times with 1000 Hz stimuli were presented at four sensation levels: 30, 50, 70, and 90 dB. No consistent trend was observed in the evoked responses with increments in signal duration. Conversely, a very clear trend of increased peak amplitude in the potentials occurred as signal rise-time was decreased.

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