Auditory Projection Area: Brain’s Sound Hub

The human brain possesses an extraordinary capacity to transform atmospheric pressure variations into the rich, subjective tapestry of acoustic experience. At the center of this sensory translation lies the auditory projection area, an anatomically intricate and physiologically sophisticated cortical region that receives direct, organized neural signals from the ascending auditory pathway. By converting raw biomechanical inputs into organized neuroelectrical maps, this specialized cortical zone serves as the indispensable bridge between peripheral hearing mechanisms and conscious acoustic perception.

Auditory Projection Area

1. Concise Definition

The auditory projection area refers to the primary neocortical region that receives point-to-point, lemniscal sensory afferents originating in the cochlea and relayed through the subcortical auditory stations, terminating principally in the transverse temporal gyri of the cerebral cortex. It represents the primary cortical destination for sound information, preserving a strict spatial arrangement of frequency sensitivities known as tonotopy.

Functionally, this region acts as the central receiving hub of the auditory system, executing the initial cortical extraction of fundamental acoustic features such as sound frequency, intensity, duration, and binaural disparity. Beyond rudimentary reception, the auditory projection area coordinates early temporal resolution, provides rapid gating of acoustic signals, and distributes feedforward projections to surrounding association cortices for complex auditory recognition, spatial localization, and language comprehension.

2. Etymology & Linguistic Origin

The term auditory projection area is constructed from three distinct linguistic roots reflecting sensory physiology, neuroanatomy, and functional localization. The adjective auditory derives from the Latin verb audire, meaning “to hear,” which evolved into the Late Latin nominal form auditorius (“pertaining to hearing or listening”). The word was absorbed into early modern English medical and philosophical discourses during the late sixteenth century to delineate sensory faculties governing sound sensation.

The constituent projection originates from the Latin proiectio (a stretching out or throwing forward), derived from proicere (formed by combining pro-, meaning “forth” or “forward,” and iacere, meaning “to throw”). In classical neuroanatomy, projection designates the long-range axonal pathways that systematically “cast” neural representations from lower neural nuclei onto designated expanses of the cerebral mantle. Finally, area stems from the Latin substantive area, signifying an open space, threshing floor, or delineated vacant ground. Together, the phrase entered mid-nineteenth and early twentieth-century neurophysiology to define the precise parcel of the telencephalon where ascending acoustic radiation fibers terminate.

3. Pronunciation & Grammatical Form

Pronunciation: Phonetically transcribed in the International Phonetic Alphabet (IPA) as /ˈɔː.dɪ.tɔː.ri prəˈdʒɛk.ʃən ˈɛə.ri.ə/ in British English and /ˈɔː.dəˌtɔːr.i prəˈdʒɛk.ʃən ˈɛr.i.ə/ in General American English.

Part of Speech: Complex noun phrase (compound nominal).

Grammatical Variants: The plural form is auditory projection areas. The phrase is frequently used as a count noun to denote either the singular primary receptive field or both bilateral receptive fields situated across the cerebral hemispheres. In clinical and physiological literature, it often appears as an attributive modifier, as seen in “auditory projection area ablation” or “auditory projection area microarchitecture.”

4. Detailed Conceptual Explanation

The auditory projection area occupies the superior portion of the temporal lobe, predominantly nestled within the lateral sulcus (Sylvian fissure) on the superior temporal plane. Anatomically, it corresponds to Heschl’s gyrus (anterior transverse temporal gyrus), structurally cataloged in cytoarchitectonic atlases as Brodmann area 41 (BA 41), along with adjacent regions of Brodmann area 42. It represents the telencephalic terminus of the core ascending acoustic pathway, which originates at the hair cells of the organ of Corti and ascends successively through the cochlear nuclei, the superior olivary complex, the lateral lemniscus, the inferior colliculus, and the medial geniculate nucleus (specifically the ventral division) of the thalamus.

The structural hallmarks of this cortical zone are defined by classic koniocortex (granular cortex). The cytoarchitecture exhibits an exceptionally prominent, dense internal granular layer (Layer IV) packed with small stellate interneurons receiving dense thalamocortical axon terminals. Pyramidal neurons in supragranular layers (Layers II and III) facilitate intracortical communication and lateral inhibition, while infragranular layers (Layers V and VI) dispatch robust corticofugal feedback projections back to the medial geniculate body, inferior colliculus, and lower brainstem structures, modulating ascending sensory gain in real time.

A governing physiological principle of the auditory projection area is tonotopy, an orderly spatial preservation of frequency selectivity. Just as the basilar membrane within the cochlea separates high frequencies at its narrow, stiff base and low frequencies at its wide, compliant apex, the primary auditory cortex distributes frequency-tuned neuronal columns along an anatomical axis. In humans, higher acoustic frequencies generally map onto posterior-medial regions of Heschl’s gyrus, whereas lower frequencies align systematically toward the anterior-lateral border. Perpendicular to these isofrequency bands are functional bands dedicated to binaural interaction, alternating between summation columns (cells excited by stimulation of either ear) and suppression columns (cells excited by one ear and inhibited by stimulation of the contralateral ear).

Beyond passive spatial maps, the auditory projection area displays dynamic computational properties. It possesses sharp temporal resolution, enabling the millisecond-scale discrimination necessary for parsing rapidly shifting acoustic spectra, including the formant transitions essential for speech comprehension and the microsecond-level interaural time differences required for horizontal sound localization. Neurons within this territory demonstrate specialized tuning for frequency modulations (FM sweeps), amplitude modulations (AM rates), and acoustic onset latencies, serving as the foundational building blocks for higher auditory cognition.

5. Historical Development

The identification of the auditory projection area emerged during the late nineteenth and early twentieth centuries through convergent discoveries in postmortem clinical pathology, comparative neuroanatomy, and animal ablation paradigms. For centuries, sensory localization within the cerebral cortex was fiercely debated between holistic conceptualizations of brain function and functional modularity. The path toward sensory mapping crystallized following Paul Broca’s 1861 demonstrations of speech motor localization, prompting investigators to search for corresponding sensory receptive centers.

In the 1870s, Scottish neurologist and physiologist Sir David Ferrier performed precise electrical stimulation and ablation experiments in non-human primates. Ferrier observed that localized lesioning of the superior temporal gyrus abolished behavioral orienting responses to sound, leading him to propose that the auditory cortex was housed along the superior margin of the temporal lobe. Shortly thereafter, Austrian anatomist Richard Ladislaus Heschl published his definitive 1878 monograph identifying the transverse temporal gyri situated on the inward-facing bank of the lateral sulcus, an anatomical landmark that would permanently carry his name.

During the early twentieth century, German neuroanatomist Korbinian Brodmann applied histological staining techniques to trace laminar boundaries across mammalian cerebral cortices. In his monumental 1909 cytoarchitectonic classification, Brodmann designated the dense koniocortex of Heschl’s gyrus as area 41 (primary auditory cortex) and the bordering dysgranular cortex as area 42 (secondary or associative auditory field). Soon afterward, Constantin von Economo and Georg N. Koskinas refined this structural taxonomy, categorizing the area as granular cortex type TC, distinguishing its unique cellular density from adjacent temporal association zones.

Physiological verification of the tonotopic map occurred in the mid-twentieth century through microelectrode recordings conducted by researchers such as Clinton Woolsey, Edward Walzl, and Jerzy Rose. These neurophysiologists proved that discrete tonal stimulations in animal preparations evoked localized electrical potentials across orderly cortical bands. Later, intraoperative direct cortical stimulation studies on awake neurosurgical patients performed by Wilder Penfield revealed that localized electrical activation of the auditory projection area generated elementary auditory hallucinations, such as clicks, buzzes, tones, and pure rushing sounds, rather than complex verbal or musical perceptions. In the late twentieth and early twenty-first centuries, the advent of functional magnetic resonance imaging (fMRI) and magnetoencephalography (MEG) allowed researchers to confirm these organized, high-resolution tonotopic distributions non-invasively within living human participants.

6. Theoretical Foundations

The contemporary scientific understanding of the auditory projection area is governed by three primary theoretical frameworks: the core-belt-parabelt organizational model, the dual-stream hypothesis of auditory processing, and predictive processing theory.

The structural framework most widely adopted in auditory neuroscience is the hierarchical Core-Belt-Parabelt model formulated by Jon Kaas, Troy Hackett, and colleagues. In this model, the auditory projection area forms the structural “Core” (comprising primary area A1, the rostral field R, and the rostrotemporal field RT), characterized by dense thalamic input from the ventral medial geniculate body and pristine tonotopic alignment. Surrounding this core is the intermediate “Belt” zone, which receives input from the core and the dorsal/medial divisions of the thalamus. The Belt in turn feeds the surrounding lateral “Parabelt,” which conveys acoustic signals to frontal, parietal, and broader temporal association areas. Hierarchically, computational complexity scales outward: while core neurons respond vigorously to simple pure tones and clicks, belt and parabelt neurons respond preferentially to spectrotemporally complex sounds, such as band-pass noise, species-specific vocalizations, and human phonetic components.

To explain higher-order auditory functional divergence, Josef Rauschecker, Gregory Hickok, and David Poeppel developed the Dual-Stream Hypothesis. Once acoustic signals are filtered through the primary auditory projection area, information diverges into two anatomical and functional pathways:

• Ventral Stream (“What” Pathway): Emanating from the core projection zone antero-ventrally toward the anterior superior temporal gyrus and inferior temporal lobe, this stream mediates the structural identification, categorization, and semantic decoding of sound objects, including speech phonemes, environmental cues, and musical timbres.
• Dorsal Stream (“Where/How” Pathway): Emerging postero-dorsally from the projection area toward the parietal operculum, inferior parietal lobule, and premotor frontal cortices, this stream computes spatial localization, tracks source movement, and coordinates sensorimotor transformations necessary for speech repetition, vocal imitation, and auditory-motor coordination.

Under Predictive Processing Frameworks, the auditory projection area is conceptualized not merely as a passive feedforward relay station, but as an active inferential engine. Drawing from Karl Friston’s formulation of the Bayesian brain, top-down predictive signals from higher-tier association cortices continuously project back to primary layer neurons via infragranular circuits. The primary projection area acts as an active comparator, continuously computing the mathematical difference between descending sensory expectations and ascending subcortical inputs. The residual signal, known as prediction error, is propagated upward through the hierarchy to update perceptual beliefs and recalibrate acoustic models of the external environment.

7. Key Components, Types & Dimensions

The auditory projection complex comprises several structural, functional, and anatomical dimensions:

• Cytoarchitectonic Fields (Brodmann Areas 41 & 42): The inner core of the auditory projection area occupies Area 41, featuring dense Layer IV koniocortical development. Area 42 forms the adjacent medial-lateral belt zone, displaying a dysgranular transitional cytoarchitecture that bridges primary input to higher-order unimodal association cortex.
• Cochleotopic / Tonotopic Axis: Functional mapping dividing the cortical surface into systematic isofrequency bands. High frequencies map caudomedially, intermediate frequencies distribute across central sectors, and low frequencies deploy anterolaterally along the transverse temporal crest.
• Binaural Interaction Columns: Orthogonal functional columns embedded within isofrequency strips, divided between summation (EE: excited-excited) units, which enhance firing rates when both ears are stimulated, and suppression (EI: excited-inhibited) units, which rely on interaural level differences to calculate horizontal acoustic trajectories.
• Ascending Acoustic Radiations: The anatomical subcortical bundle (radiationes acusticae) arising from the ventral division of the medial geniculate body. These thalamocortical fibers traverse the sublenticular segment of the internal capsule to enter the transverse temporal gyri.
• Corticofugal Descending Feedback Channels: Extensive reciprocal pyramidal projections stemming from cortical Layers V and VI that descend back to the thalamus, superior olivary complex, and cochlear nucleus, providing real-time efferent filtering, selective auditory attention gating, and sensory protection against acoustic saturation.

8. Examples & Illustrative Cases

The functional indispensability of the auditory projection area is vividly demonstrated across experimental lesions, clinical pathologies, and distinct neuroplastic conditions:

• Case Illustration of Cortical Deafness: A patient suffers sequential bilateral thromboembolic cerebrovascular accidents localized strictly to both middle cerebral artery distributions, selectively infarcted bilaterally across the superior temporal planes and Heschl’s gyri. Clinically, the patient retains intact peripheral hearing mechanisms (demonstrating normal acoustic impedance, otoacoustic emissions, and intact brainstem auditory evoked responses), yet demonstrates complete functional inability to consciously perceive, detect, or register any environmental or verbal sounds, presenting clinically with profound cortical deafness.
• Pure Word Deafness (Auditory Verbal Agnosia): Damage affecting the left primary auditory projection area along with deep transcallosal white matter pathways severing interhemispheric connections from the right auditory cortex leaves non-verbal acoustic perception unimpaired. The patient can accurately identify telephone rings, car horns, and animal vocalizations, yet experiences spoken language as completely unintelligible noise, illustrating the reliance of language processors on intact primary projection transfer.
• Absolute Pitch (AP) Morphological Adaptations: Neuroimaging comparisons of professional musicians with absolute pitch versus regular musicians reveal pronounced anatomical asymmetry in the auditory projection area. Absolute pitch possessors exhibit an unusually accentuated left-lateralized enlargement of the planum temporale and structural refinements within Heschl’s gyrus, manifesting narrower spectral tuning widths and hyper-precise tonotopic spatial organization.
• Subjective Tinnitus Reorganization: Following peripheral sensorineural hearing loss (such as noise-induced damage to high-frequency cochlear hair cells), the auditory projection area undergoes maladaptive homeostatic neuroplasticity. Neurons in the deprived high-frequency cortical zones, lacking ascending thalamocortical drive, develop heightened spontaneous firing rates and expanded receptive fields driven by adjacent, intact low-frequency inputs, generating the conscious phantom sound perception characteristic of chronic tinnitus.

9. Measurement & Assessment

Assessing the anatomical integrity and functional responsiveness of the auditory projection area involves structural imaging, electrophysiological diagnostics, and functional hemodynamics:

• Auditory Evoked Potentials (AEP / Middle Latency Responses): Auditory middle latency responses (MLR), captured between 10 and 80 milliseconds post-stimulus onset via scalp electroencephalography (EEG), directly evaluate the primary auditory projection area. Specifically, the positive-negative waveforms denoted as Na, Pa, and Nb waves reflect synchronized thalamocortical activation within Heschl’s gyrus. Cortical late responses (such as the N100 or P200) evaluate early associative gating and conscious detection of acoustic changes.
• Magnetoencephalography (MEG): Because the primary auditory projection area is deeply buried within the folds of the Sylvian fissure, its neuronal current dipoles orient tangential to the scalp surface. MEG provides an optimal modality to capture these tangential magnetic fields, offering both millisecond temporal precision and millimeter spatial localization of tonotopic bands and the auditory M100 response.
• Functional Magnetic Resonance Imaging (fMRI): Utilizing specialized “sparse-sampling” paradigms designed to eliminate scanner acoustic interference during scan acquisition, high-field fMRI (3T and 7T) tracks blood-oxygen-level-dependent (BOLD) signal changes across Heschl’s gyrus. This allows high-resolution spatial visualization of tonotopic gradient reversals that delineate primary core fields from secondary belt regions.
• Intracranial Electrocorticography (ECoG): Employed in neurosurgical populations undergoing invasive pre-surgical evaluation for intractable epilepsy, intracranial subdural grid electrodes placed directly on the exposed superior temporal plane permit recording of local field potentials and high-gamma band power (70–150 Hz), providing direct, real-time measurements of human auditory projection responses to complex phonetic stimuli.

10. Applications & Practical Significance

A rigorous understanding of the auditory projection area translates into clinical neurology, neurotechnology, audiology, and cognitive rehabilitation:

In neurotology and sensory prosthetics, insights into cortical tonotopy directly inform the engineering of auditory brainstem implants (ABIs) and high-density cochlear implants. By engineering stimulation channels that align with the spatial distribution of frequency representations preserved in the ascending thalamocortical projection system, biomedical engineers can maximize the recovery of speech comprehension in individuals with severe sensorineural or auditory nerve pathology.

In clinical neurology, assessing auditory projection area responses serves as a critical prognostic indicator for coma emergence, brain death confirmation, and post-anoxic vegetative states. The preservation of the middle latency Pa wave or the mismatch negativity (MMN) signal indicates intact thalamocortical transmission through the primary projection area, signaling preserved neocortical connectivity and a higher likelihood of awakening.

Furthermore, in speech-language pathology and developmental cognitive neuroscience, processing delays within the auditory projection area are increasingly recognized as core physiological biomarkers for specific learning disorders, developmental dyslexia, and central auditory processing disorders (CAPD). Targeted acoustic training regimens and neurofeedback interventions leverage the latent plasticity of this cortex to sharpen temporal resolution and improve phonemic boundary discernment in struggling learners.

11. Research & Empirical Evidence

Decades of empirical investigation have expanded our understanding of the auditory projection area from a static anatomical map to a highly adaptive, state-dependent computational network.

Seminal investigations by Michael Merzenich and colleagues in the 1980s and 1990s revolutionized the field by showing that adult auditory cortex maintains remarkable physiological neuroplasticity. By training adult non-human primates on behavioral frequency discrimination tasks, Merzenich demonstrated that the cortical sector of the auditory projection area dedicated to the rewarded behavioral frequencies expanded considerably within weeks, directly linking sensory behavioral learning to spatial reorganization of primary cortical representations.

In contemporary human neuroscience, pioneering research by Robert Zatorre and colleagues has clarified the hemispheric specialization of bilateral auditory projection areas. Utilizing fMRI and structural voxel-based morphometry, Zatorre established that while both hemispheres maintain tonotopic representations, the left auditory projection area exhibits greater temporal resolution, optimized to track rapid, short-duration acoustic shifts typical of speech phonetics. In contrast, the right auditory projection area exhibits enhanced spectral resolution, optimized to decode fine pitch gradations, prosody, and harmonic musical relationships.

Further structural studies by Kaas and Hackett in non-human primates established that the auditory core comprises at least three distinct subdivisions (A1, R, and RT), each possessing an inverted tonotopic gradient relative to its neighbor. Functional imaging in humans has corroborated this arrangement, revealing mirror-symmetric tonotopic gradients along the crest of Heschl’s gyrus that separate the human homologues of the primate core fields.

12. Cultural & Cross-Cultural Considerations

While the fundamental cytoarchitectural blueprint of the auditory projection area is genetically determined and conserved across human populations, early environmental sensory inputs systematically shape its operational tuning.

A notable example of cross-cultural neuroplastic adaptation occurs in the comparative neurophysiology of native speakers of tonal languages (such as Mandarin Chinese, Cantonese, or Vietnamese) versus non-tonal languages (such as English or German). In tonal languages, lexical meaning hinges entirely upon subtle variations in pitch contour and pitch inflection. Electrophysiological research reveals that native tonal language speakers exhibit enhanced early auditory projection responses (such as larger brainstem frequency-following responses and heightened cortical N100 sensitivity) to fine pitch changes. This structural and functional tuning demonstrates that early linguistic immersion molds early sensory projection areas to prioritize acoustic dimensions that carry high cultural survival and communicative value.

Similarly, cross-cultural studies of musical training reveal distinct regional variations in how acoustic pitch intervals and rhythmic metric groupings are processed. Musicians trained in traditions utilizing non-Western scale structures (such as microtonal scales in traditional Arabic maqam or Indian classical raga systems) demonstrate heightened frequency discrimination indices and distinctive receptive-field tuning within the auditory projection area compared to listeners exposed exclusively to Western equal temperament. These findings underscore that culture acts as a powerful environmental driver, actively sculpting the physiological tuning curves of human sensory cortices.

13. Criticisms, Debates & Limitations

Despite substantial neuroscientific consensus, several ongoing debates and theoretical controversies challenge traditional views of the auditory projection area:

• Hierarchical Linearity vs. Distributed Parallelism: The classical model posits that acoustic information flows strictly sequentially: thalamus → primary core → secondary belt → associative parabelt. However, neuroanatomical tracing has identified non-lemniscal thalamic pathways that bypass the primary auditory projection area entirely, projecting directly to secondary and associative fields. This anatomical arrangement indicates that associative processing can occur in parallel to, or even independent of, primary projection calculations, challenging strictly serial models of acoustic cognition.
• Anatomical Variability and Multiplicity of Heschl’s Gyrus: A major clinical and neuroimaging challenge lies in the extreme anatomical variability of the transverse temporal region across individuals. Approximately 30% to 50% of human brains feature duplicated or even triplicated Heschl’s gyri (either unilaterally or bilaterally). Neuroscientists continue to debate whether primary core koniocortex is confined exclusively to the most anterior gyrus or extends across multiple transverse gyri, complicating direct cross-subject spatial alignment in neuroimaging research.
• Modularity vs. Multisensory Integration: Classical textbook doctrine defines the auditory projection area as an exclusively unimodal sensory processor. However, emerging intracranial recording data demonstrate that primary auditory neurons can be modulated by visual inputs (such as lip-reading cues) and somatosensory stimuli (such as tactile vibrations) at extraordinarily early response latencies (<50 milliseconds). This evidence fuels contentious debate regarding whether true unimodal sensory cortex exists in the human brain, or whether multisensory computation begins at the primary projection interface.

14. Related Terms & Distinctions

To avoid conceptual confusion, the auditory projection area must be distinguished from adjacent anatomical and functional zones:

• Secondary Auditory Cortex (Belt Zone / Brodmann Area 42): Surrounding the primary auditory projection core, the secondary auditory cortex receives inputs primarily from the primary projection area and non-lemniscal thalamus. Unlike the primary core’s sharp tuning to pure tones, secondary auditory neurons require complex, spectrally broad sounds (such as environmental noises and vocalizations) for optimal activation.
• Auditory Association Cortex (Parabelt / Brodmann Area 22): Occupying the lateral surface of the superior temporal gyrus, this higher-order territory integrates acoustic inputs with linguistic, visual, and memory systems, translating acoustic features into semantic meaning and conscious conceptual identification.
• Wernicke’s Area: Situated in the posterior sector of the superior temporal gyrus in the language-dominant hemisphere, Wernicke’s area is an auditory association field dedicated to phonological and lexical processing of speech. While the primary auditory projection area detects acoustic phonemic transitions, Wernicke’s area maps those phonetic patterns onto linguistic concepts and syntactic rules.
• Medial Geniculate Body (MGB): The auditory nucleus of the thalamus. The MGB serves as the obligatory subcortical relay and gateway that prepares, refines, and projects ascending acoustic information directly to the auditory projection area via thalamocortical radiation fibers.

15. Summary & Key Takeaways

The auditory projection area stands as the foundational neocortical gateway for sound perception in the human brain. Cytoarchitectonically designated as Brodmann area 41 and anatomically situated along Heschl’s gyrus within the depths of the lateral sulcus, this koniocortical region receives direct acoustic inputs from the ventral division of the medial geniculate body.

Its structural organization is characterized by a preservation of cochlear mechanics, arranged along a tonotopic gradient where acoustic frequency is translated into spatial cortical coordinates. Working as the core of a hierarchical network, the auditory projection area analyzes basic acoustic features—such as frequency, intensity, duration, and binaural disparity—before dispatching processed signals along divergent ventral (“what”) and dorsal (“where/how”) streams for semantic categorization and sensorimotor localization.

Far from a static acoustic relay, the auditory projection area possesses remarkable neuroplasticity, dynamically reallocating its receptive fields in response to behavioral training, cultural linguistic immersion, musical experience, and peripheral sensory loss. Its structural and functional assessment remains a cornerstone of cognitive neuroscience, clinical neurology, and the ongoing development of advanced auditory neural prostheses.

References

• Brodmann, K. (1909). Vergleichende Lokalisationslehre der Grosshirnrinde in ihren Prinzipien dargestellt auf Grund des Zellenbaues. Johann Ambrosius Barth.
• Hackett, T. A. (2011). Information flow in the auditory cortical network. Hearing Research, 271(1–2), 133–146. https://doi.org/10.1016/j.heares.2010.01.011
• Hickok, G., & Poeppel, D. (2007). The cortical organization of speech processing. Nature Reviews Neuroscience, 8(5), 393–402. https://doi.org/10.1038/nrn2113
• Kaas, J. H., & Hackett, T. A. (2000). Subdivisions of auditory cortex and processing streams in primates. Proceedings of the National Academy of Sciences, 97(22), 11793–11799. https://doi.org/10.1073/pnas.97.22.11793
• Penfield, W., & Perot, P. (1963). The brain’s record of auditory and visual experience: A final summary and discussion. Brain, 86(4), 595–696. https://doi.org/10.1093/brain/86.4.595
• Rauschecker, J. P., & Tian, B. (2000). Mechanisms and streams for processing of “what” and “where” in auditory cortex. Proceedings of the National Academy of Sciences, 97(22), 11800–11806. https://doi.org/10.1073/pnas.97.22.11800
• Zatorre, R. J., Belin, P., & Penhune, V. B. (2002). Structure and function of auditory cortex: Music and speech. Trends in Cognitive Sciences, 6(1), 37–46. https://doi.org/10.1016/S1364-6613(00)01816-7