Evidence for two pitch encoding mechanisms using a selective auditory training paradigm

Grimault, Nicolas; Micheyl, Christophe; Carlyon, Robert P.; Collet, Lionel

doi:10.3758/bf03195785

Cited by 40 publications

(42 citation statements)

References 52 publications

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“…Before looking at the threshold changes across the pre-and post-testing sessions, it is worth examining the performance of the participants during the first behavioral session, as well as the performance improvements across training sessions. The F0 DLs measured in the first session for the static tone were higher than the thresholds measured in naive listeners for similar stimuli in another study (Grimault et al 2002). This is at least in part due to the fact that the three-interval, three-alternative forced-choice procedure used in the present experiment tracked a higher level of performance (a higher d′ value) than the three-interval, two-alternative forced-choice procedure used in the earlier study.…”

Section: Learning Curvescontrasting

confidence: 68%

Subcortical Plasticity Following Perceptual Learning in a Pitch Discrimination Task

Carcagno

Plack

2010

JARO

155

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Practice can lead to dramatic improvements in the discrimination of auditory stimuli. In this study, we investigated changes of the frequency-following response (FFR), a subcortical component of the auditory evoked potentials, after a period of pitch discrimination training. Twenty-seven adult listeners were trained for 10 h on a pitch discrimination task using one of three different complex tone stimuli. One had a static pitch contour, one had a rising pitch contour, and one had a falling pitch contour. Behavioral measures of pitch discrimination and FFRs for all the stimuli were measured before and after the training phase for these participants, as well as for an untrained control group (n=12). Trained participants showed significant improvements in pitch discrimination compared to the control group for all three trained stimuli. These improvements were partly specific for stimuli with the same pitch modulation (dynamic vs. static) and with the same pitch trajectory (rising vs. falling) as the trained stimulus. Also, the robustness of FFR neural phase locking to the sound envelope increased significantly more in trained participants compared to the control group for the static and rising contour, but not for the falling contour. Changes in FFR strength were partly specific for stimuli with the same pitch modulation (dynamic vs. static) of the trained stimulus. Changes in FFR strength, however, were not specific for stimuli with the same pitch trajectory (rising vs. falling) as the trained stimulus. These findings indicate that even relatively low-level processes in the mature auditory system are subject to experience-related change.

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Section: Learning Curvescontrasting

confidence: 68%

Subcortical Plasticity Following Perceptual Learning in a Pitch Discrimination Task

Carcagno

Plack

2010

JARO

155

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“…This experiment confirms earlier reports that F 0 discrimination training leads to a significant improve- ment in pitch discrimination (Grimault et al 2002;Demany and Semal 2002). Furthermore, the results of this experiment show that this improvement is partly pitch-specific for complexes filtered into the same frequency region.…”

Section: Behavioral Resultssupporting

confidence: 81%

“…In support of this dual pitch mechanism theory, Grimault et al (2002) found that F 0 discrimination learning with harmonic complexes was partly specific to the resolvability of their partials. Listeners trained with a resolved-harmonic complex showed greater improvements with other untrained resolved-harmonic complexes than with unresolved-harmonic complexes, and vice versa.…”

Section: Introductionmentioning

confidence: 55%

Pitch Discrimination Learning: Specificity for Pitch and Harmonic Resolvability, and Electrophysiological Correlates

Carcagno

Plack

2011

JARO

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Multiple-hour training on a pitch discrimination task dramatically decreases the threshold for detecting a pitch difference between two harmonic complexes. Here, we investigated the specificity of this perceptual learning with respect to the pitch and the resolvability of the trained harmonic complex, as well as its cortical electrophysiological correlates. We trained 24 participants for 12 h on a pitch discrimination task using one of four different harmonic complexes. The complexes differed in pitch and/or spectral resolvability of their components by the cochlea, but were filtered into the same spectral region. Cortical-evoked potentials and a behavioral measure of pitch discrimination were assessed before and after training for all the four complexes. The change in these measures was compared to that of two control groups: one trained on a level discrimination task and one without any training. The behavioral results showed that learning was partly specific to both pitch and resolvability. Training with a resolved-harmonic complex improved pitch discrimination for resolved complexes more than training with an unresolved complex. However, we did not find evidence that training with an unresolved complex leads to specific learning for unresolved complexes. Training affected the P2 component of the cortical-evoked potentials, as well as a later component (250-400 ms). No significant changes were found on the mismatch negativity (MMN) component, although a separate experiment showed that this measure was sensitive to pitch changes equivalent to the pitch discriminability changes induced by training. This result suggests that pitch discrimination training affects processes not measured by the MMN, for example, processes higher in level or parallel to those involved in MMN generation.

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“…Note that this proposed mechanism can account only for the pitch of unresolved harmonics, since resolved harmonics will not evoke temporally-modulated responses within a single neural filter. However, unlike psychophysics experiments that use low-pass masking noise to reduce or abolish the contribution of distortions in temporal pitch mechanisms (Bernstein and Oxenham 2003;Grimault et al 2002;Plack and White 2000), these studies were not able to exclude the contribution to neural responses of low-frequency combinations tones (distortions) generated by the nonlinear mechanics of the basilar membrane in response to relatively spectrally complex (compared with pure tones) AM tones. Given the potential interest in central auditory mechanisms that extract modulation and/or pitch information, it is imperative that the contributions of peripheral mechanisms to neural responses be discounted before central mechanisms are assumed.…”

Section: Introductionmentioning

confidence: 97%

Neural Sensitivity to Periodicity in the Inferior Colliculus: Evidence for the Role of Cochlear Distortions

McAlpine

2004

Journal of Neurophysiology

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McAlpine, David. Neural sensitivity to periodicity in the inferior colliculus: evidence for the role of cochlear distortions. J Neurophysiol 92: 1295-1311, 2004. First published May 5, 2004 10.1152/ jn.00034.2004. Responses of low characteristic-frequency (CF) neurons in the inferior colliculus were obtained to amplitude-modulated (AM) high-frequency tones in which the modulation rate was equal to the neuron's CF. Despite all spectral components lying outside the pure tone-evoked response areas, discharge rates were modulated by the AM signals. Introducing a low-frequency tone (CF Ϫ 1 Hz) to the same ear as the AM tones produced a 1-Hz beat in the neural response. Introducing a tone (CF Ϫ 1 Hz) to the opposite ear to the AM tone also produced a beat in the neural response, with the beat at the period of the interaural phase difference between the CF Ϫ 1 Hz tone in one ear, and the AM rate in the other ear. The monaural and interaural interactions of the AM signals with introduced pure tones suggest that AM tones generate combination tones, (inter-modulation distortion) on the basilar membrane. These interact with low-frequency tones presented to the same ear to produce monaural beats on the basilar membrane, modulating the responses of inferior colliculus (IC) neurons on the 1-Hz period of the monaural beats or interacting binaurally with neural input generated in response to stimulation of the opposite ear. The auditory midbrain appears to show a robust representation of cochlear distortions generated by amplitude-modulated sounds.

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Evidence for two pitch encoding mechanisms using a selective auditory training paradigm

Cited by 40 publications

References 52 publications

Subcortical Plasticity Following Perceptual Learning in a Pitch Discrimination Task

Subcortical Plasticity Following Perceptual Learning in a Pitch Discrimination Task

Pitch Discrimination Learning: Specificity for Pitch and Harmonic Resolvability, and Electrophysiological Correlates

Neural Sensitivity to Periodicity in the Inferior Colliculus: Evidence for the Role of Cochlear Distortions

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