Altered States of Consciousness and Brainwave Manipulation

In 1983, the U.S. Army Lieutenant Colonel Wayne M. McDonnell penned a report entitled “Analysis and Assessment of the Gateway Process,” introducing the world to the Gateway Experience. This training system, according to McDonnell, was designed to enhance brainwave output between the left and right hemispheres, resulting in altered states of consciousness. The Gateway Experience utilizes sound and brainwave manipulation to enable individuals to transcend the confines of physical space and time. In this article, we will delve into the fascinating world of the Gateway Experience, exploring its mechanics, practical applications, and the transformative effects it can have on one’s perception of reality.

Understanding the Gateway Experience and Hemisink Technique

The Gateway Experience is primarily centered around the Hemisink technique, which aims to synchronize brainwave patterns between the left and right hemispheres. By achieving coherence in brainwave amplitude and frequency, participants can enter altered states of consciousness. Unlike traditional forms of meditation, the Gateway Experience employs audio techniques developed by Bob Monroe to induce and sustain hemisink. The significance of this technique lies in its ability to unlock access to various levels of intuitive knowledge, beyond ordinary conscious awareness.

The Mechanics of Brainwave Coherence

To comprehend the mechanics of the Gateway Experience, it is crucial to understand brainwave coherence. Dr. Stewart Twemlow, a research associate of the Monroe Institute, explains that the audio techniques employed in the Gateway tapes encourage the focusing of brain energy into narrower frequency bands, akin to the concept of one-pointedness in yoga. As individuals progress through the Gateway tapes, there is a gradual increase in brainwave size, indicating enhanced brain energy and power. This serves as the initial step toward entering the Gateway and embarking on a journey of self-discovery.

Lamp versus Laser: The Power of Hemisink

To illustrate the transformative power of the Hemisink technique, Melissa Jaeger from the Monroe Institute offers a metaphorical comparison. She likens the natural state of the human mind to an ordinary lamp, diffusing energy in a chaotic manner. However, under the influence of Hemisink, the mind behaves like a laser beam, projecting a disciplined stream of energy with total coherence. This concentrated energy allows the mind to resonate at higher vibrational levels and establish synchronization with rarefied energy in the universe. Through this resonance, the mind can process information and perceive reality in novel ways.

Frequency Following Response: Synchronizing Brain Hemispheres

The Gateway Experience capitalizes on the frequency following response (FFR), a phenomenon in which the brain tries to mimic external frequencies it is exposed to. By utilizing sound frequencies that emulate brainwave patterns, the Gateway system encourages the brain to entrain its wave frequency output accordingly. Additionally, the technique of beat frequencies comes into play, where the brain perceives the difference between two audible frequencies. This utilization of FFR and beat frequencies allows the Gateway tapes to relax the left hemisphere, induce a sleep-like state, and establish coherence between brain hemispheres.

The Role of Resonance in the Gateway Process

Resonance plays a pivotal role in the efficacy of the Gateway system. Deep transcendental meditative states achieved through practices like yoga or Zen result in a change in the resonance pattern of the human body. This alteration eliminates the bifurcation echo, enabling the heart’s sound to resonate harmoniously throughout the body. The Gateway tapes induce profound relaxation, leading to the resonance pattern shift required for accessing different levels of consciousness. Resonance acts as the bridge that connects the human mind to the universal energy field, unlocking new realms of reality and intuitive knowledge.


The Gateway Experience stands as a pioneering training system that utilizes brainwave manipulation and resonance to enable individuals to explore altered states of consciousness. By fostering coherence between brain hemispheres and utilizing sound frequencies, the Gateway tapes provide a gateway to realms beyond ordinary perception. This transformative journey opens doors to intuitive knowledge, expands awareness, and invites individuals to tap into the boundless potential of the human mind. Whether one seeks personal growth, spiritual enlightenment, or a deeper understanding of the nature of reality, the Gateway Experience offers a unique and profound exploration into the depths of human consciousness.