The auditory P2 is influenced by pitch changes but not pitch strength and consists of two separate subcomponents.

For the first subcomponent, termed P2a, activity in the auditory cortex was significantly stronger than in the surrounding auditory association cortex and a pronounced trend for more activity in the right hemisphere was observed ( Fig. 5B ).

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In contrast, when comparing all stimuli with a regular spectral structure (i.e., all harmonic and inharmonic conditions pooled together) to a control condition comprising speech-shaped noise, cluster-based testing indicated three separate highly significant clusters, as shown on the right side of Figure 2C .

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