Martin & Boothroyd1010 Martin BA, Boothroyd A. Cortical, auditory, event-related potentials in response to periodic and aperiodic stimuli with the same spectral envelope. Ear Hear 1999;20(01):33–44
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1999 |
10 adults with normal hearing |
Signals were concatenated to produce two stimuli that changed in the middle (noise-tone, tone-noise) |
The noise-tone and tone-noise stimuli evoked N1 – P2 acoustic change complex in response to the change in periodicity occurring in the middle. |
Ostroff et al.1111 Ostroff JM, Martin BA, Boothroyd A. Cortical evoked response to acoustic change within a syllable. Ear Hear 1998;19(04):290–297
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1998 |
8 adults with normal hearing |
Three naturally produced speech stimuli: 1. [sei], 2. [s], 3. [ei] |
Clear responses were observed to both sibilants and isolated vowel. |
Martinez et al.1212 Martinez AS, Eisenberg LS, Boothroyd A. The Acoustic Change Complex in Young Children with Hearing Loss: A Preliminary Study. Semin Hear 2013;34(04):278–287
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2013 |
3 adults and 5 children with normal hearing, 5 children with bilateral sensorineural hearing loss |
Stimuli consisted of quasi-synthetic vowels, i.e., vowel place contrast and vowel height contrast |
ACC can be used as a tool to investigate auditory resolution in children with hearing loss. |
Ganapathy et al.1313 Ganapathy MK, Narne VK, Kalaiah MK, Manjula P. Effect of pre-transition stimulus duration on acoustic change complex. Int J Audiol 2013;52(05):350–359
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2013 |
10 individuals with normal hearing |
Stimuli used were consonant-vowel syllable and tonal complex stimuli with varying pre-transition durations |
The speech stimulus required lesser duration of pre-transition than non-speech stimulus. |
He at al.1515 He S, Grose JH, Teagle HF, et al. Acoustically evoked auditory change complex in children with auditory neuropathy spectrum disorder: a potential objective tool for identifying cochlear implant candidates. Ear Hear 2015;36(03):289–301
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2015 |
19 children with bilateral Auditory Neuropathy Spectrum disorder |
Two noise segments separated by gaps of different duration |
Gap detection threshold measured using electrophysiological recordings of the ACC correlated well with those measured using psychophysical procedures |
Brown et al.1616 Brown CJ, Etler C, He S, et al. The electrically evoked auditory change complex: preliminary results from nucleus cochlear implant users. Ear Hear 2008;29(05):704–717
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2008 |
Nine adults with cochlear implant |
EEACC was recorded by introducing a change in the stimulating electrode 300 milliseconds after the onset of the pulse train. |
Results showed the usefulness of recording the EACC in response to changes in stimulating electrode position |
Harris et al.1818 Harris KC, Mills JH, Dubno JR. Electrophysiologic correlates of intensity discrimination in cortical evoked potentials of younger and older adults. Hear Res 2007;228(1-2):58–68
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2007 |
10 younger and 10 older adults with normal hearing |
ACC was elicited by an intensity increase in an otherwise continuous pure tone. |
Outcome revealed decreased intensity discrimination and prolonged latencies in older subjects is an age-related decline in central auditory nervous system. |
Tremblay et al.1919 Tremblay KL, Kalstein L, Billings CJ, Souza PE. The neural representation of consonant-vowel transitions in adults who wear hearing AIDS. Trends Amplif 2006;10(03):155–162
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2006 |
Seven adults (50–76 years) with mild to severe sensori-neural hearing |
Consonant-vowel (CV) syllables |
Neural detection of CV transitions can be measured with the help of ACC in hearing aid users. |
Cowan at al.2121 Cowan R, Ching T, Van Dun B, et al. Evaluating auditory discrimination in infants using visual reinforcement infant speech discrimination (VRISD) and the acoustic change complex (ACC). J Hear Sci 2017;7(01):12–19
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2017 |
60 hearing-impaired and 30 normal-hearing infants |
Stimuli were spectral-ripple noise (SRN), sibilants /s-z/ and vowels /u-i/. |
ACC might be preferred over VRISD for discrimination evaluation. |
Han & Dimitrijevic2424 Han JH, Dimitrijevic A. Acoustic change responses to amplitude modulation: a method to quantify cortical temporal processing and hemispheric asymmetry. Front Neurosci 2015;9(02):38–43
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2015 |
Ten normal hearing adults |
Continuous white noise with occasional changes consisting of AM |
N1 responses to the ACC resembled a low pass filter shape |
Small & Werker2525 Small SA, Werker JF. Does the ACC have potential as an index of early speech discrimination ability? A preliminary study in 4-month-old infants with normal hearing. Ear Hear 2012;33(06): e59–e69
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2012 |
Six adults and twenty-five 4-month-old infants |
Stimuli were concatenated consonant pairs |
ACC have potential as an index of early speech-discrimination ability |
Friesen & Tremblay2929 Friesen LM, Tremblay KL. Acoustic change complexes recorded in adult cochlear implant listeners. Ear Hear 2006;27(06):678–685
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2006 |
Eight adults wearing the Nucleus-24 cochlear implant |
Naturally produced speech tokens /si/ and /ʃi/. |
ACC can be recorded using complex signals among CI users to study central auditory functioning. |
Yau et al.3131 Yau SH, Bardy F, Sowman PF, Brock J. The magnetic acoustic change complex and mismatch field: acomparison of neurophysiological measures of auditory discrimination. Aim Neuroscience 2017;4(01):14–27
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2017 |
14 adults with normal hearing |
Vowel changes in a synthetic vowel sound |
ACC is a robust and efficient measure of simple auditory discrimination |
Kang et al.3232 Kang S, Woo J, Park H, Brown CJ, Hong SH, Moon IJ. Objective Test of Cochlear Dead Region: Electrophysiologic Approach using Acoustic Change Complex. Sci Rep 2018;8(01):1–11
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2018 |
8 normal hearing listeners, 12 listener without cochlear dead region, 4 listeners with cochlear dead region |
A pure tone of 1,000 Hz was used with an increment of 3 dB HL. |
It is possible to detect the presence of cochlear dead region using ACC |
Kumar et al.3333 Kumar P, Sanju HK, Hussain RO, Kaverappa Ganapathy M, Singh NK. Utility of acoustic change complex as an objective tool to evaluate difference limen for intensity in cochlear hearing loss and auditory neuropathy spectrum disorder. Am J Audiol 2020;29 (03):375–383
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2020 |
Twenty normal-hearing individuals, 19 individuals with auditory neuropathy, and 23 individuals with cochlear hearing loss |
For eliciting ACC, a 1,000 Hz pure tone with intensity increments of 1, 3, 4, 5, 10, and 20 dB were presented at 80 dB SPL. |
ACC could be a useful objective tool to measure DLI in the clinical population |
Kumar et al.3434 Kumar P, Sanju HK, Singh NK. Neural representation of consonantvowel transition in individuals with cochlear hearing loss and auditory neuropathy spectrum disorder. Eur Arch Otorhinolaryngol 2021;277(10):2739–2744
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2020 |
15, 17 and 18 subjects with normal hearing, auditory neuropathy, cochlear hearing loss respectively |
ACC was recorded for naturally produced CV stimulus /sa/ of 380 milliseconds in duration. |
Finding of the study showed ACC as a tool to investigate neural encoding of speech stimuli in different clinical population. |
Kumar et al.3535 KumarP,Singh NK,Ganapathy MK,SanjuHK,ApekshaK.Codingof consonant-vowel transition in children with central auditory processing disorder: an electrophysiological study. Eur Arch Otorhinolaryngol 2021;278(10):3673–3681
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2020 |
Twenty children diagnosed having CAPD and 20 normal hearing children |
ACC was acquired using naturally produced CV syllable /sa/ |
Prolonged latencies of ACC indicated poor encoding of CV transition in children with CAPD. |
Kumar et al.3636 Kumar P, Singh NK, Sanju HK, Kaverappa GM. Feasibilityofobjective assessment of difference limen for intensity using acoustic change complex in children with central auditory processing disorder. Int J Pediatr Otorhinolaryngol 2020;137(01):1–7
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2020 |
Fifteen children with (C)APD and 15 normal hearing children |
For eliciting ACC, a 1,000 Hz pure tone with intensity increments of 1, 3, 4, 5, 10, and 20 dB was presented at 80 dB SPL. |
ACC could be a useful objective tool to measure DLI in the children with CAPD |