• The Journal of the Acoustical Society of Korea
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• v.39 no.1
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• pp.57-63
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• 2020

The binaural beat is a subjective beating phenomenon due to the frequency difference of sounds heard in both ears, sensed by the human brain. The beating magnitude physically depends on the amplitudes of the two signals with slight different frequencies. Therefore, the binaural beat strength is expected to be affected by the difference in left and right hearing ability. In this study, 34 healthy subjects without hearing loss were chosen. They hear a pure tone sound (450 Hz) at 10 different Sound Pressure Levels (SPLs) (from 50 dB to 27.4 dB) through the one side of ears, while they hear the reference sound (440 Hz, 50 dB) through the other side of ears. Their subjective assessment using a semantic differential method reveals that the binaural beat strength decreases as SPL differences between the two sides of ears increases, if the difference is greater than 2.2 dB. The result suggests that the hearing loss difference between the two sides of ears should be less than 2.2 dB to maximize binaural beating effects.

• Journal of Naturopathy
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• v.13 no.1
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• pp.14-23
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• 2024

Background: Binaural beats frequencies, measured in Hertz (Hz), are applied to induce optimal brainwave states and activate mental and physical relaxation through brainwave entrainment. Therefore, an exploration of the interrelation between binaural beats, brain synchronization, and the tranquility of mind and body, including meditative brainwaves, is necessary. Purposes: This study aims to investigate the mechanisms of binaural beats and brainwave resonance, along with brain synchronicity, and how sound frequencies (Hz) relate to relaxation, meditative brainwaves, and overall mental and physical tranquility. Methods: Through a literature review of existing research and materials, this study examines: first, binaural beats and the Brain-Sync process; second, the induction of relaxation through resonance and brainwaves; third, the stabilization of brainwaves and entrainment phenomena with binaural beats and sound; fourth, the relationship between binaural beats and meditative music. Results: Binaural beats facilitate the synchronization of brainwaves through the Brain-Sync process, particularly activating relaxation-related brainwaves such as alpha (α), theta (θ), and delta (δ), thereby inducing a meditative state. This is based on the mechanism where brainwaves synchronize with specific frequency vibrations, leading to deep meditation or relaxation states. Thus, specific sound frequencies play a significant intermediary role in inducing a sustained and stable meditative brainwave state, beyond mere psychological and physiological relaxation responses. Conclusion: This study explores the characteristics of binaural beats through the interaction between brainwave resonance and synchronization, examining the role of sound frequency vibrations as a significant intervention method contributing to mental and physical comfort and brainwave stability. It suggests the need for systematic intermediary processes in the healthcare domain and various research areas to verify the short-term/long-term effects and the necessity for extensive research on meditative frequency sound interventions.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.05a
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• pp.527-528
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• 2016

In this paper, to provide a binaural beat in the method of treatment of sleep disorders. Let the sound of different frequencies, the waveform of the brain resonate at a specific frequency, to induce a stable state, is converted over to a high-frequency audio frequency, improves the listening experience. To target the three college students for the results performance evaluation of, conducted an experiment on the sense of stability at the time of sleep, in the process, the brain waves were measured as a means to check the degree of sense of stability.