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.
The phenomena of brainwave entrainment was first described in the scientific literature in 1973 by Gerald Oster in results published in an article in Scientific American entitled, “Auditory Beats in the Brain”. He showed that a specific brainwave could be induced when a person heard two separate, but closely related, sound frequencies, one in each ear. He discovered that when the frequencies heard by each ear differed by about 10 hertz, the brainwave pattern of the person hearing the sound would synchronize to the difference between the two frequencies. For example, if the person heard a 410 hertz sound in one ear and a 400 hertz sound in the other ear, their brainwaves would stabilize at the difference between the two, or 10 hertz. This technique is called binaural beats, and it is a fundamental principle of brainwave entrainment methods.
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:
Are you someone who has turned to meditation or yoga as a way of relieving stress and improving your overall well-being? Yoga and meditation are time-proven methods, used for centuries, which restore mental, physical, and spiritual balance in people’s lives, and brainwave entrainment can be used in conjunction with these practices for even deeper levels of benefit. 
The Brain Salon collection is the culmination of more than 100 years of brainwave research that has discovered how to help the brain switch mental states in a matter of minutes. Brain Salon is a collection of six different audio CDs that use special inaudible pulses with lavish natural sounds and special entrainment techniques like binaural entrainment, sound modulation, and isochronic tones to influence brainwaves. The six different discs are designed to help listeners relax, feel creative, achieve deep sleep, reach high energy levels, be in a more positive mood, or achieve razor sharp focus in less than 30 minutes. In addition to the full audio series, customers will also receive the complete Brain Salon user manual, lifetime support for Brain Salon products, a total money-back guarantee within two months, and a bonus MP3 recording of Craig Tice, original Brain Salon developer. All of the materials are available online only for two monthly payments of $77, or a discounted one-time payment of $127.
"I have been using Quantum Mind Power for two weeks and today I feel that although the changes are subtle, I have been able to overcome many roadblocks in my personal life. I have ADHD and have been taking Adderall for 7 years, recently I decided that I need to stop and have cut my dosage in half with the intention of completely stopping within a month.  I have also just started teaching Pilates as a second job.....
An invigorating, brain-sharpening session, this audio starts at 14Hz, a beta feel-good frequency, and SR harmonic. It then steps up in six-minute harmonic increments, gradually up to gamma 39Hz, leaving you feeling mentally stimulated and full of energy. A binaural beat track supports the main frequencies for those wearing headphones. Uplifting background music with embedded amplitude modulation provides a further layer of entrainment. Excellent for use as a morning alarm clock, ahead of a big night out, or to inspire those tired trips to the gym.

Hello Jason, this is an unusually thoughtful discussion. Thank you for all your expertise and your kind manner of presenting and moderating it. I’m wondering if you have any experience with this: ever since I’ve been exposed to theta wave music, without headphones, I have found it irritating. And this is in spite of the fact that when I was first handed a CD by someone I knew well and trusted he was so confident I’d love it It didn’t occur to either of us that I might not. This happened again recently, which is about 10 years later, when I heard it playing overhead at an acupuncture clinic. I felt restless and even irritated, unable to zone out, which is unusual for me, during the treatment. I realized that the quality of my irritation was similar to what I’d felt listening to that CD a decade ago.So I asked if it was theta wave music and she said yes. The acupuncturist said that some people, but a vast minority, really dislike the music. She said that the few people who dislike it are not simply neutral, but actively dislike it. And she also said, but most people like it a lot. I’m just wondering what kind of factors might be present that would make a person feel so irritated by this music?
Theta brainwaves are next highest in frequency above delta and are especially important for many people using brainwave entrainment and meditation because theta waves are at a threshold, forming a link between wakefulness and the subconscious mind. Theta waves bridge between our awake self and the creative and insightful understandings from below our conscious awareness, and while they are not common in awake adults, they are normative for children under 13 years old. 
It is important to note that not all stress is bad. Everyone experiences a certain amount of stress on an almost daily basis, and it cannot be completely eliminated. Stress becomes a problem when too much is experienced, and it has a negative impact on behaviors, relationships, and health. The term “eustress” refers to positive stress that is associated with improved performance and productivity. “Distress” is negative stress that is associated with performance decrement and negative health consequences. The individual’s perception of the stressor and coping resources determine whether a situation is eustress or distress. College graduation is a stressor for most. The student who has a job or who has been accepted to a graduate program likely perceives the stress of graduation as eustress, whereas the student who has student loans and no immediate plans of a job or further education perceives distress.

Just as stress can increase the risk for chronic diseases and other health problems, dealing with chronic conditions and poor health can increase the amount of stress one experiences. Stress also influences behaviors that affect health. Diet choices, sleep habits, and drug use are behaviors that are often negatively affected by stress (3). The APA’s 2011 survey showed that 39% percent of respondents reported overeating or eating unhealthy food because of stress, and 29% reported skipping a meal (3). In addition, 44% reported lying awake at night because of stress (3). On a positive note, 47% of respondents reported walking or exercise as a way of managing stress (3).
Discovered by Austrian Psychiatrist Hans Berger in 1908, Alpha brainwaves cycle 8 to 13 times per second, a good bit slower than beta brainwaves. While considered a part of a group of brainwaves, the Alpha brainwave has one distinct trait that makes it stand out from its siblings – it appears and disappears while going through our brain. Sometimes alpha waves are present, sometimes they are not. The disappearance of the Alpha brainwave usually occurs when someone is asleep or experiences heightened emotions such as fear or anger. This brainwave only appears whenever a person is awake and relaxed, a one-of-a-kind distinction among other types of brainwaves. 
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In the Sun, Moon, Ultra Sun & Ultra Moon chapter, it was revealed that Anabel had become a member of the International Police. She, along with Looker first appear investigating Po Town, where several Ultra Beasts had appeared before breaking out and wreaking havoc on Ula'ula Island. Shortly after arriving, Anabel and Looker meet with Sun and Moon, a pair of children who had previously faced the Ultra Beasts. While she questioned Sun and Moon about the beasts, Anabel had Looker go off to investigate the rampaging beasts to find information on them as well. After receiving the information, Anabel sent out her Mismagius to battle Blacephalon, another Ultra Beast that emerged from an Ultra Wormhole.
I just want to write another email about how happy I am with your product, Equisync I, or the alpha waves. I dont think I have ever been so relaxed in my entire life. When I get sink into the state, it feels like a huge electric blanket is pulsing through my body, a really warm, swirling feeling, and my mind is very inactive. I am a meditator without your product. I am able to enter witness consciousness fairly easy on my own sometimes during the day in activity. This isnt the heart oriented feeling of bliss or expansion, but it still is great for the body/mind. This is great though, as it seems to fully relax me. I still believe, that for one to really see dramatic results, meditation should be a way of life. Considering how many of us, spend most of our day unconscious, not aware of the witness or the self, an hour a day is better than nothing, but would be best to be proactive during the day, watching. Keep up the great work and thank you for your product and research.
However, Brain Wave, Tranquil Mind and Perfect Sleep are, by far, the best for me. Banzai Labs has done a good job. You can select any of a variety of binaural applications from Morning Coffee straight through 20 routines to Deep Sleep. I tried Power Nap for 20 minutes and dozed off. However, instead of being a little groggy or spaced when I awoke, I was alert and oriented.
Proceedings of the 9th Conference on Interdisciplinary Musicology – CIM14. Berlin, Germany 2014 BINAURAL AUDIO RELAXATION TECHNIQUES FOR PEOPLE WITH ANXIETY AND STRESS Geraldine Molina, Emilia Sainz, Levi Serrano, Santiago Rentería, Diana Urquiza Instituto Tecnológico y de Estudios Superiores de Monterrey, Campus Santa Fe Correspondence should be addressed to: rosas_ger@hotmail.com, dianauf@itesm.mx Abstract: Since the beginning of the 21st century, there has been a great development in different studies related to encephalography and the psychological consequences of binaural audio. The objective of this paper is to analyze the effects of binaural audio as a relaxation method for people that suffer anxiety and stress. The study took place at ITESM, Santa Fe Campus, where twenty participants around 21 years old took part of the study. They were divided into two groups, Experimental and Control. The first one listened to the Theta binaural stimuli and the second one listened to a stimulus with nature sounds (birds and wind). The results show that the experimental group got to conscious relaxation. The control group had an unconscious relaxation (sleep), but when the stimuli stopped they recovered their stress level, for some participants it increased. 1. BACKGROUND At the end of the 19th century, Pierre Janet, a French psychologist, discovered that his patients relaxed when they were exposed to rhythmic light patterns. Hans Berger showed in 1924 that brainwaves could be read and studied through an encephalogram [2]. The first studies were done using visual stimuli, while later studies were done using sounds [3]. Brainwaves are caused by changes in the electric tension between two points in the brain cortex. The electroencephalogram has been used to analyze neurophysiological relations that exist between mental states and brainwave frequencies. When somebody’s mental state changes from alert to somnolence, low amplitude and high frequency brain waves turn into high amplitude and low frequency [4]. 2. BINAURAL AUDIO Giuseppe Tartini discovered combination tones. These occur when two tones are heard at the same time and the listener perceives a third tone. The frequency of the third tone is calculated by the difference between the first two tones, as shown in equation 1. (∆   ) [8] (1) The superior olivary complex integrates the phase differences, which makes possible the perception of the third tone. For example, if the left ear hears a 400Hz tone and the right ear a 410Hz tone, the listener will perceive a 10Hz tone [9]. This third tone is also known as binaural frequency. The binaural frequency is directed from the superior olivary complex to the reticular formation and the brain cortex, where the electroencephalogram can read its effect. The Frequency Following Response (FFR) phenomenon happens when the frequency read by the encephalogram is equal to the combination tone frequency. When this happens, the frequency resonates in the brain stimulating the reticular formation inducing different psychological states. Brainwave bands and psychological consequences are shown in Table 1 [16]. Table 1: Brainwave Frequencies and Psychological Consequences Brainwaves Frequency (Hz) Amplitude (μV) Mental StateDelta 0.1 - 3 20-200 Consciousness is lost, sleep without dreams Theta 4 - 7 20-100 REM Sleep, meditation, and Creativity Alpha 8 - 12 20-60 Conscious Relaxation Beta 13 - 40 2-20 Concentration, Alert, and cognition (High levels are associated with anxiety) It has been proved that delta sound waves in binaural audio therapy have anxiolytic effects on patients with pre-surgery anxiety [7]. Theta binaural sound waves are also helpful with relaxation and anxiety reduction [11]. According to the results presented by the company Regus, in Mexico, 75% of employed people suffer from stress and anxiety. These cause social, health, and economic problems at the same time that productivity decreases [5]. According to the Mexican National Labor Organization, stress means that the GDP decreases from 0.5 to 3.5%. Stress leads to anxiety, irritability, fear, depression, suicidal thoughts, and lack of concentration. Some other symptoms are headaches, nausea, dizziness, muscular tension, insomnia, and tachycardia [6]. There are different techniques to induce relaxation like meditation. New relaxation techniques with binaural audio have been developed through Neurosciences. 3. OBJECTIVES • Evaluate and analyze binaural audio therapy effects (Theta frequencies) on people that suffer anxiety and stress (Students at ITESM), in order to induce relaxation and reduce anxiety. • Determine if the binaural therapy induced relaxation in the experimental group and compare the results to those from the control group. • Through the STAI test and the electroencephalogram results, determine which stimulus is more efficient. 4. HYPOTHESIS Hi: Frequency Following Response phenomenon will take place, as Delta and Theta bands will share frequencies with the combination tones. Hi: Beta brainwaves will show up when the stimulus begins, as they are related to concentration and alertness. 5. EXPERIMENT Twenty participants were randomly divided into two groups, control and experimental. The first group listened to sounds of
When your mind is all over the place, organizing your thoughts into a quick to-do list can help transfer the burden from your brain to paper. But for some people, seeing a long list of tasks can increase stress. Miller has another idea: a “stressor and action” sheet. “Fold a piece of paper in half length wise, and on the left column write ‘stressor’ and on the right hand column write ‘action,’” she says. “You will find as you write down thoughtful action steps to the things that are stressing you out, you regain authority over circumstance.” These are the signs you’re more stressed than you realize.
Binaural Beats or “binaural tones” are created by playing slightly different frequencies separately into each ear. The difference between the two frequencies stimulates a response in the brain which correlates with this frequency difference. For example, if we present a 100 Hz tone to the left ear and a 105 Hz tone to the right ear, a frequency of 5 Hz is stimulated. This is what is known as the “frequency following response”.

Theta waves have another interesting characteristic. The Earth has a measurable resonance of 7.83 hertz known as the Schumann resonance. Because the Schumann resonance is a constant background frequency surrounding all life, it may play a special role in biological activity. The Schumann resonance frequency falls within the range of theta brainwaves and may have something to do with why these brainwave frequencies are so powerful. 
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.
Yoga, an excellent stress-relief exercise, involves a series of moving and stationary poses, or postures, combined with deep breathing. A mind-body exercise, yoga can strengthen your body’s natural relaxation response and bring you into a healthy balance. For stress relief, do gentle yoga or yoga for beginners — popular “power yoga” classes may be too intense if your main goal is to ease stress.
While the physiological and psychological processes being uncovered by brain science in the study of brainwaves is sometimes complex and still being investigated, certain basic principles are well-established, easily understood, and helpful for achieving the most effectively use of brainwave entrainment when seeking relaxation, improved sleep, lowering of anxiety, or other goals. This important background information and scientific knowledge presented here includes: 
I have read something different about theta waves and learning languages. A University of Washington study tested students resting brainwave activity before learning French. They found that students with a higher amount beta/gamma and a lower amount of delta/theta activity were better at acquiring a second language. When you are dominant in theta, that is the lowest and most deeply relaxed awakened state you can be in. I think it would be much harder to really concentrate, fully understand and learn new information while in a theta state, so I would personally consider using theta while studying.
Taking five minutes to reflect on how you pulled through other stressful situations like your last breakup or when you switched jobs can help you reconnect with your resilient side. In the moment, it may feel as though you'll never get over your present problem, but when you look back, you realize that you felt similarly before and found a way to overcome it. If you're going through a divorce or recently lost a loved one, you also may want to seek out a support group: Research on grieving presented by the Center for the Advancement of Health in Washington, D.C., suggests that talking with peers is even more beneficial than one-on-one counseling in the initial months after a loss.
When you're having a hell of a day—good or bad—checking out for 10-15 minutes is revitalizing. Find a place where you can be alone (and definitely ditch the cell phone)—the attic, the bathroom, a quiet cafe, a big oak tree—and wipe the slate clean for a few minutes. Do whatever it is that relaxes you: Meditate, read a novel, sing or sip tea. It's crucial to take just a few minutes everyday to de-stress. It's not how much time you allot, but being consistent that's important.
Meditation enhancement: There are several companies that sell brainwave entrainment sessions specifically designed to enhance meditation. The sounds provide a stimuli to focus on during the meditation, and the brain waves naturally shift towards the frequency provided. Whether meditation is actually enhanced by brainwave entrainment is a subject of debate. However, advanced meditators commonly experience brainwave synchronization – which the right and left hemispheres display the same frequency brain waves.  While there are scientific benefits of meditation, it is unclear as to whether they are enhanced, hindered, or unaffected by adjunctive brainwave entrainment.
Gamma waves are the fastest brainwave frequency range. Gamma brain waves are believed to link and process information from all other parts of the brain. A high amount of gamma wave activity in the brain is associated with intelligence, compassion, focus and feelings of happiness. High levels of gamma brain waves have also been linked to improved memory and an increased sensitivity to sensory input. Low amounts of gamma brainwave activity have been linked to learning difficulties, poor memory and impaired mental processing.
However, unlike our own brains, which last a lifetime, these mini-brains are relatively short-lived. The human brain has the advantage of a circulatory system, allowing it  to  survive and function. By supplying brain organoids with a special cocktail of factors, they can grow in a dish, develop and survive, but  only to a limited degree. But, by transplanting brain organoids into the brains of living mice, one group of scientists has shown that artificially grown organoids have the potential to resemble a real human brain even more closely when they  are sustained by a living blood supply.

Later, Anabel and Moon traveled to Vast Poni Canyon, where they witnessed Faba battling Plumeria. Anabel confronted Faba about the Aether Foundation's involvement with the Ultra Beasts' appearance in Alola. Worried that his plans could be jeopardized, Faba has his Aether Foundation Employees battle against Anabel and Moon, hoping the distraction would give him the chance to escape. Anabel used her Pokémon to keep the Employees busy while she, Moon, and Plumeria followed Faba. As he approached the Poni Altar, Faba revealed he was aware of his pursuers and proceeded to attack them while assisted by more Employees. During the battle, Moon was grabbed by Tapu Koko and taken to the Poni Altar.
However, unlike our own brains, which last a lifetime, these mini-brains are relatively short-lived. The human brain has the advantage of a circulatory system, allowing it  to  survive and function. By supplying brain organoids with a special cocktail of factors, they can grow in a dish, develop and survive, but  only to a limited degree. But, by transplanting brain organoids into the brains of living mice, one group of scientists has shown that artificially grown organoids have the potential to resemble a real human brain even more closely when they  are sustained by a living blood supply.
Enter the matrix, and be awakened. Here is the code to DEEPLY relax and awaken your soul. Using Alpha isochronic tones and binaural beats (14 hz through to 12 Hz, 10 Hz and finally back up to 14 Hz), the music and pulsing beats and tones are produced to take you into a dream like, timeless state of mind. Time won’t  exist when you listen to this track. Track 1. Binaural beats. Track 2. Isochronic tones Track 3. Isochronic tones and binaural beats. Listen to Sample Track here.
I like it. I like the fact that I can just sit there and observe my thoughts and feelings and then go back to watching my breathing. It really does teach me to be centered and balanced. I look forward to the next several weeks. By the way, what I am doing now is meditating for 23 minutes in the early morning and again 23 minutes in the early evening. I’ll check back with you.
Everyone knows stress can cause you to lose sleep. Unfortunately, lack of sleep is also a key cause of stress. This vicious cycle causes the brain and body to get out of whack and only gets worse with time. Make sure to get the doctor-recommended seven to eight hours of sleep. Turn the TV off earlier, dim the lights, and give yourself time to relax before going to bed. It may be the most effective stress buster on our list.
The advice “take a deep breath” may seem like a cliché, but it holds true when it comes to stress. For centuries, Buddhist monks have been conscious of deliberate breathing during meditation. For an easy three- to five-minute exercise, sit up in your chair with your feet flat on the floor and hands on top of your knees. Breathe in and out slowly and deeply, concentrating on your lungs as they expand fully in your chest. While shallow breathing causes stress, deep breathing oxygenates your blood, helps center your body, and clears your mind.
The pitch frequency measures and describes what a beat sounds like, i.e. does the isochronic beat have a deeper bass sound, or is it high pitched and sharper sounding? The beat waveform frequency describes how many times the beat is repeating per second, i.e. how fast it is beating. You don’t really need to concern yourself about the pitch frequency, as that doesn’t have a direct influence on brainwave entrainment and doesn’t play a part on the measurement on an EEG. I only mentioned it because you were referring to humans not being able to hear below 20Hz. I change the pitch frequency just to suit the mood of the track. For tracks that are to be relaxing, for meditation or sleep, I tend to use a lower pitch frequency so it sounds deeper and more relaxing and I never have that lower than 100Hz. For an energizing, high focus track I might use a more higher pitched 200Hz isochronic tone, because that is sharper sounding and less likely to make you feel sleepy. That’s all you really need to know about the pitch frequency.
Other entrainment methods sometimes used include autopan modulation that moves sound in an 180º arc to create a desired tone. Harmonic box entrainment, invented by James Mann, uses a layering of binaural and monaural tones that alternate between ears, requiring headphones. Sound modulation and filtering, amplitude modulation, and pitch panning use diverse sounds to create rhythmic pulses matched to the desired brainwave 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

Isochronic tones work by influencing your brainwave activity and they can’t directly affect the body. That said, the brain does control the body, so sensations and feelings can sometimes be felt in the body after stimulating your brainwave activity. Some people who are new listeners of this type of audio can sometimes feel tingling sensations in their body. Not everyone feels this and these sensations usually stop once you get more used to using the audios. Isochronic tones are considered as a safe technology. However, sometimes they can leave you feeling temporarily fatigued, especially if you listen to them for an extended period (hours) when you first start using them. If you felt fatigued, I would recommend using them for a much shorter period while you are getting used to them and ensure you are well-hydrated.

The aim of this study is to identify tendencies in the effectiveness of relaxing audio stimuli that could be verified through further focused experiments. A series of brainwave entrainment (BWE) techniques for inducing relaxation will be presented consisting of different binaural phenomena (BP). The BP will derive from the binaural sine wave beat, widely acknowledged in rhythmic BWE literature. ... [Show full abstract]View full-text

Among the four dominant types of brainwaves, the Theta wave has earned the reputation of perhaps being the “most creative”. The dominant pattern when people are in the dream stages of their sleep, a person with increased Theta brainwaves during waking activity has a very high level of thinking and creativity. With a high amplitude and frequency of 4 Hz to 8 Hz, Theta waves are often dominant in the brain’s right hemisphere, which is also the hemisphere of highly-creative people. Here are some of the benefits you might enjoy with an increased Theta brainwave production:
The immobilization response. If you’ve experienced some type of trauma and tend to “freeze” or become “stuck” under stress, your challenge is to first rouse your nervous system to a fight or flight response (above) so you can employ the applicable stress relief techniques. To do this, choose physical activity that engages both your arms and legs, such as running, dancing, or tai chi, and perform it mindfully, focusing on the sensations in your limbs as you move.

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/
There are general recommendations for stress management that can be applied in most situations. However, keep in mind that there are individual differences and preferences, so a “cookie cutter” approach should be avoided when making recommendations. A comprehensive stress management program will include specific techniques prescribed on an individual basis, but general stress management recommendations are presented in Table 2.
As you close your eyes, this session quickly lulls you down into deep delta sleep, where the body recovers and grows. The session starts at a waking frequency, soon taking you down deep into delta, with stops at sigificant beneficial frequencies such as the de-stressing 10Hz, the grounding 7.83Hz Schumann resonance (SR), and the deeply relaxing 5.5Hz. You’ll soon find yourself in a deep, healing sleep. If you’re particularly stressed, try listening to Power Chill before starting
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