Recent research at the University of Lisbon finally uncovered the reason for the 350 year-old mystery, finding that the resonance of sound is the mechanism for entrainment of swinging pendulums and ticking clocks, and it seems likely that the energy transferred by sound is also responsible for other observations of entrainment, including brainwave entrainment.

Proceedings of the 9th Conference on Interdisciplinary Musicology – CIM14. Berlin, Germany 2014 first group it increases, and for the second decreases. Experimental group did not fall asleep but maintained a relaxation state after the stimulus, while control group achieved unconscious relaxation but the effects did not hold. The STAI “State” indicated that stress increased after the stimulus for control group (see graph A1.2). 14. CONCLUSIONS • Delta (20-200) and theta (20-100) brainwaves are the ones that have greater amplitude (microvolts) in both groups. Results are clearly shown in graphs A1.5 and A1.10. Graph A1.5 Theta Graph A1.10 Delta • Higher frequency EEG waves such as beta waves have less amplitude. This happens because they are not synchronized and have more phase differences in both groups. • An increased alpha parameter is higher in the experimental group, which indicates that they achieved conscious relaxation. In contrast, the control group showed higher delta waves and presented signs of deep sleep during the experiment. Control group also possibly reached REM (Rapid Eye Movement) sleep halfway throughout the stimulus due theta waves presence in the EEG. • Beta waves are higher in the control group from s = 507 to s = 624 because of unexpected sounds in the stimulus (traffic noise appeared in the original recording). • Both stimuli induced relaxation, but it is important to point out that a person can relax without falling asleep. In this way the binaural stimulus worked better. • It is likely that the control group fell asleep with the nature sounds stimuli because lack of stimulation. • Contrary to what we expected, theta binaural waves didn’t induced FFR in experimental group, although they helped to achieve conscious relaxation. • Delta waves were higher in the experimental group during post-experiment measurements. This suggests that relaxation states were maintained with the absence of stimulus. • Presence of Alpha waves was reduced during deep sleep. This evidence is supported by the control group’s Delta values. • In the absence of stimuli, Delta wave values of the control group decreased, which means that relaxation effects did not prevail. • The effectiveness of an anxiolytic may be measured through the relaxation degree during stimulus and whether its effect endured or not. • For further evaluation of coherence [17] between brainwaves in both hemispheres and the ERP, the use of a 10-20 EEG system is recommended. • Post-experimental STAI “State” tests results are lower in the experimental group. This means that Theta binaural waves were a better anxiolytic than the stimuli (nature sounds) used in the control group. REFERENCES [1] Huang, T., & Charyton, C. (2008). A Comprehensive Review of The Psychological Effects of Brainwave Entrainment. Alternative Therapies in Health and Medicine, 14(5). [2] Berger H. (1929) Über Das Elektrenkephalogramm Des Menschen. Arch Psychiatrie Nervenkrankheiten. [3] Chatrian GE, Petersen MC, Lazarte JA. (1960) Responses to clicks from the human brain: some depth electrographic observations. Electroenceph. Clin. Neurophysiol.. [4] Ulam, Frederick A. (1991) An Investigation of the effects of binaural beat frequencies on human brain waves. California School Of Professional Psychology. [5] Notimex. (2013, July 02). México, país con más estrés laboral. El Universal. Retrieved from: http://www.eluniversal.com.mx/ciencia/2013/mexico-pais-mas-estres-laboral-78744.html [6] American Psychological Association (n.d.). Stress: The different kinds of stress. Retrieved from: http://www.apa.org/helpcenter/stress-kinds.aspx [7] R. Padmanabhan, A. J. Hildreth and D. Laws. (2005) A prospective, randomised, experimentalled study examining binaural beat audio and pre-operative anxiety in patients undergoing general anaesthesia for day case surgery. Anaesthesia. 60, 769-773. [8] Loy, Gareth. (2006) Musimathics. London, England: MIT Press. [9] Atwater, F. Holmes. (2009) Frequency Following Response Study. The Monroe Institute. [10] Ferraro, Fernando M., Acuña, Marcelo. (n.d.) Formación Reticular y Fibras de Asociación del Experimental Encefálico. Departamento de anatomia facultad de medicina, UBA. [11]Le Scouarnec, R. P., Poirier, R. M. Owens, J. E., Gauthier, J., Taylor, A. G. and Foresman, P. A. (2001) Use of Binaural beat tapes for treatment on anxiety: a pilot study of tape preference and outcomes. Alternative Therapies in Health and Medicine. [12] Díaz, M. A., & Comeche, M. I. (2004). Beneficios de la relajación. Retrived from: http://www.psicologiadelasalud.es/beneficios_de_la_relajacion.html [13] Gómez García, J. (2003). Efectos de la música trance percusiva y la música trance electrónica en el EEG. Tesis Licenciatura. Psicología. Departamento de Psicología, Escuela de Ciencias Sociales, Universidad de las Américas Puebla. Retrieved from:


In the average person, the activity of one brain hemisphere is dominant over the other, called brain lateralization. This hemispheric imbalance leads us to experience the world in a black and white way, perceiving separation over connectedness. When brainwave entrainment is used to synchronize brainwave activity in both hemispheres simultaneously, a person can more easily integrate information from all parts of the brain and solve problems with greater intelligence and sensitivity.
Judith Pennington shares her extensive knowledge of gamma brain waves with John Dupuy, co-founder of iAwake Technologies. Judith is the founder of the Institute for the Awakened Mind, where practitioners from all over the world use the Mind Mirror EEG to map, monitor, train, and research advanced states of consciousness. Judith:        I fell in love with gamma in 2005. I had started seeing extended amplitudes up in the high beta range, which normally describe states of stress, anxiety, and … [Read more...]
Filed Under: Brainwave Entrainment, Creativity, Emotional Healing, Flow State, How to Let Go, iAwake Weekly Call, Life Optimization, Meaning of Life, Meditation Technology, Practice of Meditation, Spiritual Development, Waking Up Tagged With: Benefits of Brainwave Entrainment Meditation, Brain Entrainment Meditation, Brainwave Entrainment, Brainwave States, Changing Our Brains, Conscious Evolution, Daily Meditation Practice, Finding your purpose, Integral Recovery, Life Optimization, Meaning of Life, Overcoming Depression, practice of meditation, Spiritual Development, Stealing Fire, Stealing Flow, Waking Up
Long-distance running, biking, cross-country skiing, and other outdoor activities provide a change of scenery and a dose of fresh air, both of which can help clear your mind, Plante says. Also, outdoor settings such as mountains, a biking trail, or a neighborhood park are pleasant places to spend time in. Beautiful settings, especially in spring and fall, can lift your mood and shake up your workout routine.
The only thing I have found lacking in using your product is that there is no place on your website to register my kudos to you for such an excellent product. I am not new to meditation, nor to brain entrainment products, and I found you product to be really outstanding. I’m completely hooked, love listening to the tracks and they are the best way ever to treat monkey mind. Bada boom, bada bing, in just a few minutes any aggravation I’m experiencing in the outside world, melts away and I am one very blissful and happy camper.
Later, Anabel managed to defeat and capture Faba. After meeting with Gladion, Lillie, and Hapu, the four traveled to the Altar, where they found that Sun and Moon managed to summon Solgaleo and Lunala, the Legendary Pokémon of the Alola region. After explaining what Solgaleo and Lunala are and their connection with Cosmog, Anabel received a call from Looker, who reported that a large number of Ultra Beasts emerged from Po Town and have made their way to Poni Island. Anabel teamed up with Moon, Gladion, and Hapu to fend off the attacking beasts. Later, a larger than usual wormhole opened at the Altar, which Anabel noted was caused by the Blinding One. A hand emerged from the wormhole and grabbed Solgaleo, taking control of its body. The possessed Solgaleo captured Sun with its tail and jumped into the wormhole while Moon and Nebby followed after it.
One larger and more recent randomized and controlled trial looked at the use of binaural beats in 291 patients admitted to the emergency department at a hospital. The researchers observed significant decreases in anxiety levels in patients exposed to audio with embedded binaural beats compared to those who listened to audio without binaural beats or no audio at all (headphones only).
John and Doug talk about iAwake Technologies' new track developed by Doug Prater himself, Stealing Flow - a tool which can help you become your best self. They also discuss Stealing Fire, the book which was the inspiration for Stealing Flow. John also talks about depression and how to overcome it through finding your path and your purpose - and how being in flow states facilitates that. … [Read more...]
When stress overwhelms your nervous system, your body is flooded with chemicals that prepare you for “fight or flight.” This stress response can be lifesaving in emergency situations where you need to act quickly. But when it’s constantly activated by the stresses of everyday life, it can wear your body down and take a toll on your emotional and physical health.
To use your senses to quickly relieve stress, you first need to identify the sensory experiences that work best for you. This can require some experimentation. As you employ different senses, note how quickly your stress levels drop. And be as precise as possible. What is the specific kind of sound or type of movement that affects you the most? For example, if you’re a music lover, listen to many different artists and types of music until you find the song that instantly lifts and relaxes you.

Thanks to e-mail, cell phones, and BlackBerrys, it seems like your job never ends. The increasingly blurry boundaries between work and home life leave us with less downtime than ever before (and in some cases, no downtime!). Advances in technology are a leading source of chronic stress, putting many of us in a constant state of alert. Not to mention the effect it has on family ties. A recent study published in the Journal of Marriage and Family found a link between the use of cell phones and pagers at home and increased stress, which spills over into family life. To make technology work for you, screen calls with caller ID or, better yet, limit your cell phone and e-mail use to working hours only. Can't kick the BlackBerry habit? Set a regular time you'll check it in the evening (say, after dinner), so you're not constantly disrupting home life to keep tabs on work. (The one exception: using your device to breathe with this anxiety-reducing GIF.)

Because of the controversy over the safety of estrogen replacement therapy, many women turn to natural and herbal products for relief of fluctuating hormones. One of the best and most stabilizing hormones a woman can have is progesterone. In estrogen replacement therapy, progestin has been used. It is very similar to progesterone and behaves nearly the same way in the body, but it causes all sorts of side-effects, including increasing the risk of cancer. It is, however, cheap and easily extracted.


Brainwave entrainment music can be used almost anywhere and anytime, making this mood and self-improvement method versatile and flexible enough to do at work, while traveling, or at other times during the day. When used in the workplace during short rest periods, brainwave entrainment techniques can enhance concentration, communication, and work productivity.

One larger and more recent randomized and controlled trial looked at the use of binaural beats in 291 patients admitted to the emergency department at a hospital. The researchers observed significant decreases in anxiety levels in patients exposed to audio with embedded binaural beats compared to those who listened to audio without binaural beats or no audio at all (headphones only).


No worries. For meditation, you should use low Theta state recordings – Theta is between 4-8Hz. To learn a bit more about this type of brainwave meditation, I recommend you read this guide that comes with two free samples: https://www.binauralbeatsmeditation.com/free-mp3/ This company also do a very good Deep Meditation recording which you can find at this link: https://www.binauralbeatsmeditation.com/product/deep-meditation/
Ten years prior to the events of Sun and Moon, Anabel was found unconscious on a Poni Island beach by Looker and Nanu, who had just completed a mission for the International Police. She had lost most of her memories, only able to tell them her name, that she came from Hoenn, that she protected a tower there, and that she was a powerful Trainer. After being placed in the care of the International Police, they detected incredible amounts of Ultra Wormhole energy coming from her, implying that she was a Faller who was lost in a wormhole for a significant time. Anabel has never been informed of this, however.
When combined with the right diet and exercise, progesterone cream and herbal products can help you balance your hormones and get through menopause without the life-disrupting side-effects. Just remember, all of these techniques work together. A few herbs aren’t going to overcome a bad diet and sedentary lifestyle. Your body wants to move and be active. Support it by using proper nutrition and proper exercise. Then add the herbs to give you the last little boost to make sure everything is balanced and healthy.
* We made the decision in this update to return Brain Wave to a Portrait-Only App. We know some people will miss the Landscape UI, but we did this to focus on the Brainwave Entrainment and Audio experience, and to prepare for new devices and screen sizes. Maintaining and testing portrait and landscape layouts for iOS 5-8, HD&SD, and 3 Aspect Ratios had become the single most time consuming part of our development and testing, and soon there will be even more. 90% of our dev and testing time was spent tilting iPads and iPhones of different sizes and different iOS versions, tweaking code that had nothing to do with brainwave entrainment--the reason I and others use this app everyday. Once the new Aspect Ratio devices come out and we have time to test with them, then maybe Landscape will make a comeback on the iPad.
Binaural beats were the first method discovered for brainwave entrainment and works by delivering tones of different audible frequencies to the two ears with the difference in frequency between the two tones being the frequency of entrainment. The difference in frequency between the two tones must be less than 30 hertz, and this resulting frequency is called a beat or the target frequency, and it is processed in a brain region called the olivary body. When listening to such tones with stereo headphones, the two hemispheres of the brain become synchronized at the target frequency.
This paper describes an arts-science collaborative project titled Standing Waves, which creatively entwines data drawn from the rhythms of the body in sleep/wake cycles with sensor-based technology for synaesthetic performance. The project partners situate their practice and research in the fields of choreography/dance, sleep science and media art and design. Our work explores how the ... [Show full abstract]View full-text
While it may not be a perfect therapeutic option for treating certain psychological conditions, brainwave entrainment is yet another tool that warrants further testing and exploration. There is clear evidence that certain protocols may benefit human performance. Unfortunately nearly all of the research has been conducted by those who clearly are affiliated with those who manufacture brainwave entrainment products.
Binaural beats between 1 and 30 Hz are alleged to create the same brainwave pattern that one would experience during meditation. When you listen to a sound with a certain frequency, your brain waves will synchronize with that frequency. The theory is that binaural beats can help create the frequency needed for your brain to create the same waves commonly experienced during a meditation practice. The use of binaural beats in this way is sometimes called brainwave entrainment technology.
BEST EVER! came to CB salon because i needed to be saved from a bad highlight job at a previous salon. The FULL staff came to my rescue with ideas and techniques to correct my hair. i instantly felt at ease, as i could tell they were KNOWLEDGEABLE and truly wanted to help me :)) Nicole was my colorist, very sweet and pretty. she did an UNBELIEVABLE job! i smiled the whole way home. i made my next appointment and could not be more thrilled that my life long search for the perfect salon is finally over. while i was there Christopher had a client and gave her an incredibly beautiful head of color, like.. jaw dropping. Also the salon itself is GORGEOUS! elegant, chic and bright with large windows. -sweet playlist with some staff karaoke :D I was in heaven with the hair angels!!! haha can't wait to come back!! THANK YOUUU
7. Connecting with nature. Whether it’s finding a window with a good view or tackling a hike up a beautiful mountain peak, there is just something about being outside that can be grounding. You can walk on the grass with bare feet, watch snow fall or listen to birds chirp in the distance. Utilizing your five senses is a stress-reducing technique that’s versatile enough to exercise anywhere.

So how’s that novel coming? Your new song? What about that program you were going to write? Or the website you wanted to build? If your creative project, no matter what it is, isn’t coming along as smoothly or as quickly as you’d hoped, you’re not alone. After a lot of soul-searching, research, and banging my head against the wall, I've learned a lot about creative flow, and I'd like to share these tools, tactics, and insights with you. But back to where we started... It’s not that you didn’t … [Read more...]
Memory: There is not sufficient evidence to suggest that brainwave entrainment improves memory. However since cognitive function improves as a result of entrainment, short and/or long term memory may be improved by stimulation with certain frequencies. While lower frequencies may be beneficial for recalling certain memories, conscious processing of the memories generally requires sufficient beta.
Chronic fatigue: Subjective improvements in energy level may be reported by those who increase stimulatory beta and gamma waves. Fast waves tend to be associated with higher levels of arousal. Low arousal is associated with chronic fatigue and may be exacerbated by slow brain waves (e.g. theta and delta). As of now there aren’t any studies that have analyzed various protocols for their effect on a person’s energy or arousal.
I tried other companies the last few years or so….among the likes that mainly used binaural audio and the deepest I was really ever to achieve was alpha state….maybe theta once or twice over the last few years. It takes incredible dedication and practice to achieve the deep, renewing states of meditation that are most sought after…..I listened to the theta meditation mp3 last night and within what seemed like a few minutes my mind was flooded with imagery…memories long gone…my body was sleeping, heavy as lead, but my mind was crystal clear, aware of my surroundings. I could barely even open my eyes!

Group exercise or encouraging stressed clients to find a workout partner is an excellent idea because it can provide a support network and accountability. However, there might be clients who find a group setting intimidating or competitive, which could be counterproductive in managing stress. In addition, those who report stress because of work or family obligations might enjoy the solitude of exercising alone. Using a variety of exercises or nontraditional exercises (e.g., exergaming, dance classes, yard work, or rock climbing) is a way to plan activities that are enjoyable to maximize adherence. Knowing your clients’ exercise barriers and stressors will help with planning an exercise program that can address these variables to maximize the benefits for health and stress management.
Additionally, this root may help you lose weight and feel more energetic. Women who take maca find they have a bit more energy and fewer aches and pains. Maca is popularly included in sports drinks and nootropics that help improve athletic performance. Much of the research has been done on men, in regards to athletic performance using maca, but studies have also shown women benefit as much or even more. Finally, it may help you stabilize your emotions. Specific studies have shown that maca can help relieve the symptoms of mild depression and mood swings.

When stress attacks, it can feel like your whole world is crashing down. Remind yourself what’s good in your life with a quick gratitude round-up. “Studies show gratitude techniques like counting your blessings can be a significant stress reducer,” Dr. Serani says. “Gratitude research reports that those who utilize daily gratitude reflections have higher levels of positive emotions, life satisfaction, vitality, optimism, and lower levels of depression and stress.” Reminding yourself of the good things in life can put stress in perspective. “Studies show that cultivating an optimistic mindset can help you maintain a positive mood,” Whitaker says. “When you are positive and grateful, you are able to handle difficult situations better.” Just look out for these stress relievers that actually backfire.


This Mp3 is ideal for those who are restless and have trouble relaxing. What you hear are natural night sounds of crickets chirping, yet what does the work underneath is a technique called Dissociation which helps guide the mind down to a deep delta state. This is one of the deepest state you can be in. Headphones are required for this MP3.Use this session while in bed, to help guide your brain to a state of deep, natural sleep.
Hi Et, In all the feedback and studies I’ve read and looked into over the years, I’ve seen lots of feedback from people talking about how they don’t like the sound of the tones, or they find them irritating in some way. Unfortunately, there doesn’t seem to be any particular reason why one person likes it and the next doesn’t. It’s a bit like normal music, one person’s sweet symphony is another person pneumatic drill. It’s common for people to find it weird and maybe annoying at first, which is how I felt in the beginning. But usually after a few listens you can start to get used to it and appreciate the sound, and especially the feeling it gives you. Personally, I think it can help if you try to embrace the sound, psychologically speaking beforehand. It can also help to have the sound playing at a very low volume, to begin with, then building it up as you get more used to it.
I just wanted to thank you guys for having such an outstanding product available. I used to meditate when I was younger but got away from it over the last 7-8 years. I had difficulty starting back up, but since I started using your cds I have no difficulties getting back into it; and am now meditating 2 hours per day and have never felt better. I have only been using them for a couple weeks but have already noticed a difference. Thanks again for creating such a wonderful product and I will be sure to recommend it to everyone.
You can practice visualization on your own or with a therapist (or an app or audio download of a therapist) guiding you through the imagery. You can also choose to do your visualization in silence or use listening aids, such as soothing music or a sound machine or a recording that matches your chosen setting: €”the sound of ocean waves if you’ve chosen a beach, for example.

This has been a very inclusive and helpful blog. You have covered all the different means we have to help us get through the whole menopause process. It takes a combination of all the means suggested in your article, not just one. Eating of fresh fruits and vegetables is so important. Taking of the Magnesium supplement has been most helpful, to me, along with time for meditation/prayer. We have soooo many things available to us to help us through this short sometimes difficult period in our lives. Take advantage of the suggestions in this great article.
Deep relaxation is a major benefit resulting from the brain’s cortical frequency following response. By selecting the desired rate the brain, via the frequency following response, will tend to mimic the rate it is exposed to and thus enter that brainwave state. This helps to explain why this technology can produce benefits commonly found with meditation. One of the most valuable benefits of consistent  brainwave entrainment is that we are able to experience and recognize the various states of consciousness. With practice we can learn how to re-create these states.
8. Painting your nails or doing a face mask. Sometimes, a little pampering can melt the stress away. Painting your nails takes a few minutes and the focus needed to do it can be a great distraction. Grabbing a good face mask to throw in your luggage to have handy for some relaxation doesn’t take much forethought and can go a long way at the end of a rough day. You’ll have a chance to breathe and may enjoy enjoy it.

Hi Et, In all the feedback and studies I’ve read and looked into over the years, I’ve seen lots of feedback from people talking about how they don’t like the sound of the tones, or they find them irritating in some way. Unfortunately, there doesn’t seem to be any particular reason why one person likes it and the next doesn’t. It’s a bit like normal music, one person’s sweet symphony is another person pneumatic drill. It’s common for people to find it weird and maybe annoying at first, which is how I felt in the beginning. But usually after a few listens you can start to get used to it and appreciate the sound, and especially the feeling it gives you. Personally, I think it can help if you try to embrace the sound, psychologically speaking beforehand. It can also help to have the sound playing at a very low volume, to begin with, then building it up as you get more used to it.
A high quality theta meditation MP3 specifically designed for restless, unsettled individuals. This Theta meditation, ramping in steps down to 6.5 Hz. It stimulates mid-Theta, so it may be easier to remain conscious during this session than with the deeper Theta meditations. This MP3 also uses a technique called Dissociation which is particularly useful for people who are restless and have trouble relaxing.
The mechanism for this is that when your eyes or ears are exposed to a particular frequency of pulses or beats, the thalamus first distributes this information to the entire brain, including the visual and cerebral cortex where neural activity begins to synchronize to the incoming frequency, producing hemispheric synchronization and a balance of brainwave activity across the brain.
Summaries from recent reviews on yoga or Tai Chi clinical trial interventions indicate that these mind-body types of exercise can be effective in reducing stress (7,14,17). The authors of these reviews suggest that the results should be viewed with caution because study quality was varied (7,17). However, it should be noted that reductions in stress reported in one review were similar to or greater than reductions from other types of commonly used stress management techniques (7).

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You've probably heard that the tryptophan in turkey is to blame for that food coma on Thanksgiving. The amino acid, found in protein-containing foods, helps produce serotonin, "the chemical that regulates hunger and feelings of happiness and well-being," Mangieri says. On its own, tryptophan may have a calming effect. In a 2006 study published in the Journal of Psychiatry Neuroscience, men and women who were argumentative (based on personality tests) took either tryptophan supplements or a placebo for 15 days. Those who took tryptophan were perceived as more agreeable by their study partners at the end of the two weeks compared with when they didn't take it. (The study was funded by the Canadian Institutes of Health Research.) Other foods high in tryptophan include nuts, seeds, tofu, fish, lentils, oats, beans, and eggs.


* We made the decision in this update to return Brain Wave to a Portrait-Only App. We know some people will miss the Landscape UI, but we did this to focus on the Brainwave Entrainment and Audio experience, and to prepare for new devices and screen sizes. Maintaining and testing portrait and landscape layouts for iOS 5-8, HD&SD, and 3 Aspect Ratios had become the single most time consuming part of our development and testing, and soon there will be even more. 90% of our dev and testing time was spent tilting iPads and iPhones of different sizes and different iOS versions, tweaking code that had nothing to do with brainwave entrainment--the reason I and others use this app everyday. Once the new Aspect Ratio devices come out and we have time to test with them, then maybe Landscape will make a comeback on the iPad.
Hi EJ, at the moment, there hasn’t been any research to give an indication of how long you should or shouldn’t listen for. Over time, I’ve seen people use my tracks for longer and longer. I started off providing 30-minute study tracks, but through demand, I extended them to 3-hours. I know from the many thousands of comments I’ve had on YouTube that a large number of people play those 3-hour tracks on repeat, or listen to different ones, one after the other throughout the day. I’ve also seen apps where you can play tracks like mine on continuous repeat. So it’s common for people to listen to them all day while they are studying.

You've probably heard that the tryptophan in turkey is to blame for that food coma on Thanksgiving. The amino acid, found in protein-containing foods, helps produce serotonin, "the chemical that regulates hunger and feelings of happiness and well-being," Mangieri says. On its own, tryptophan may have a calming effect. In a 2006 study published in the Journal of Psychiatry Neuroscience, men and women who were argumentative (based on personality tests) took either tryptophan supplements or a placebo for 15 days. Those who took tryptophan were perceived as more agreeable by their study partners at the end of the two weeks compared with when they didn't take it. (The study was funded by the Canadian Institutes of Health Research.) Other foods high in tryptophan include nuts, seeds, tofu, fish, lentils, oats, beans, and eggs.


Isochronic tones work just the same in delta as they do in alpha, theta and beta and they are widely used in the brainwave entrainment community to help people sleep. Like you, I’ve also seen some websites saying they don’t work in delta, but it’s a bit like the game of Chinese Whispers, where someone makes a comment and then after it gets passed around and shared a lot the message gets distorted and appears to be a fact. I don’t know of any scientific reason why they wouldn’t work in delta. I remember some people talking about this on a brainwave entrainment forum many years ago. They were saying they found isochronic tones a bit too abrupt for using to help them sleep and they preferred binaural beats, as they thought they were a more soothing sound. That was just a personal preference shared by a couple of prominent forum members at the time and some people then took that as a fact for everyone. That’s where I think that belief originated from.
So, I tried those frequencies. And after listening to the 1st one (High Beta to Gamma, Isochronic tones: 18HZ ramped up to 40HZ within 20 minutes) – I immediately stood up and started organizing! (Something that I kept forgetting to do!) Overall, I’ve found that isochronic tones & monaural beats are more immediately effective than binaural beats, though they are still good.
Binaural beats can be experienced in any float session you book.  To this point in your floating practice you may, or may not, have heard of – or perhaps already experienced – binaural beats and their effective use of being a unique option/tool to listen to while in (or out of) the tank. But what exactly are binaural beats, how do they work and why choose to listen to them? All good questions, so here we go:
The effects are strongest while you are listening to the tones because your brainwaves are synchronized and tuned into the frequency range you desire at that time.  After you've stopped listening the effects can still linger for a while afterwards.  The timescale will vary from person to person and be affected by what you do after you've stopped listening.
Headaches: There are several reports of brainwave entrainment providing therapeutic benefit for those suffering from general headaches or migraines. A study in 1985 analyzed photic stimulation within the theta range (5 Hz to 8 Hz) and discovered that this protocol provided significant headache relief. A total of 19/24 participants noted that the “slow wave” photic stimulation provided “complete relief” from chronic headaches and migraines.
This session shifts from the 14Hz sensormotor rhythm through beta to 40Hz gamma, and repeats the pattern over and over, constantly “revving up”the mind with each repetition. The process is stabilized with a 10Hz background alpha beat, allowing the brain a place to relax instantly, whenever a let up allows. Use this session any time, and for as long as required to get the job done. Take in a High Energy Espresso on long-hauls for a welcome lift. Works without headphones, but the best benefits can be found with them. The session finishes at a fast, revving 18Hz beta. For use mainly with eyes open, engaged in activity - with benefit to be gained from periodically closing your eyes briefly and relaxing.
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