THE EVIDENCE / RESEARCH LIBRARY

An open question deserves an open evidence base.

A curated starting point for understanding sound, memory, and learning. Published findings are distinct from NeuroCodec hypotheses.

Curated by the NeuroCodec project · Updated September 11, 2026. Evidence labels are editorial summaries, not formal certainty ratings. This is a selective library, not a systematic review. Source verification means bibliographic details and the linked abstract were checked.

4 VERIFIED PUBLICATIONS · EDITORIAL EVIDENCE LABELS

TMR2020 / Psychological Bulletin

Promoting memory consolidation during sleep: A meta-analysis of targeted memory reactivation

Xiaoqing Hu, Larry Y. Cheng, Man Hey Chiu, Ken A. Paller

A meta-analysis examining how cueing previously learned information during sleep relates to later memory.

NeuroCodec relevanceMotivates controlled tests of memory reinforcement after daytime learning.

LimitationsEffects vary by task and sleep conditions. This does not establish learning unfamiliar material during sleep.

Moderate · synthesisRead publication
PubMed: 32027149
sleep2013 / Neuron

Auditory closed-loop stimulation of the sleep slow oscillation enhances memory

Hong-Viet V. Ngo, Thomas Martinetz, Jan Born, Matthias Mölle

A controlled study linking carefully timed auditory stimulation with sleep oscillations and declarative memory consolidation.

NeuroCodec relevanceSuggests timing deserves investigation in a future supervised sleep protocol.

LimitationsA specific laboratory protocol is not proof of general learning enhancement or a consumer application.

Controlled studyRead publication
PubMed: 23583623
auditory statistical learning1996 / Science

Statistical learning by 8-month-old infants

Jenny R. Saffran, Richard N. Aslin, Elissa L. Newport

Infants learned regularities in a stream of speech sounds, supporting sensitivity to auditory statistical structure.

NeuroCodec relevanceMotivates questions about learnable sound patterns and concept associations.

LimitationsLearning speech regularities does not demonstrate that arbitrary acoustic tokens convey complex knowledge.

Foundational experimentRead publication
PubMed: 8943209
binaural beats2023 / PLOS ONE

Binaural beats to entrain the brain? A systematic review of the effects of binaural beat stimulation on brain oscillatory activity, and the implications for psychological research and intervention

Ruth Maria Ingendoh, Ella S. Posny, Angela Heine

A systematic review found inconsistent evidence for brainwave entrainment and highlighted methodological differences.

NeuroCodec relevanceSupports testing rather than assuming a binaural-beat benefit.

LimitationsPhysiological findings are not equivalent to learning outcomes.

Mixed evidenceRead publication
PubMed: 37205669 · DOI: 10.1371/journal.pone.0286023

Areas still under review

Individual gamma response, music cognition, adaptive learning, EEG applications, and patents need further source verification. Personalization is a hypothesis, not evidence that an individual frequency improves learning.

A separate research landscape

Focused ultrasound is outside NeuroCodec’s current scope. It must not be confused with ordinary headphone audio. Source verification pending; NeuroCodec is not developing or testing ultrasound neuromodulation.