Controlled or pre/post studies of the effects of BWE using auditory or visual stimulation were eligible for inclusion, provided pulses of light or tone were delivered at frequencies hypothesised to have a beneficial effect or in line with a protocol addressing clinical outcomes. Studies were required to report clinical or psychological outcomes (measured using standard methods or as deemed appropriate by peer review) and to report statistical analysis. Studies of outcomes such as electroencephalogram (EEG) response or neurotransmitter levels were not eligible. Case studies were excluded.
To summarize all this, we can see that the type of product you choose plays an important role in answering that question – “Can brainwave entrainment damage my brain?” My personal advice as a long-term user of the technology is to Be selective about what brainwave entrainment audios you download from the internet, and make sure to follow the instructions! 
The good news is there are loads of guided meditations which will not only take you into theta brain waves, but will make you feel good about yourself at the unconscious level too. These are some of my favourite types of brainwave entrainment - and you can get them on topics such as money, confidence, creativity, success, relationships, weight loss, smoking and more.
Delta brainwaves, resonating at 1Hz-4Hz, usually only occur in the deeper levels of sleep. It is even uncommon to access Delta brainwaves through meditation, unless one is very advanced, or is using brainwave entrainment. Even while using brainwave entrainment technology, it will take some mental training and practice to be able to maintain conscious awareness and not fall asleep.
Meanwhile, the therapeutic benefits of listening to sound and music is a well-established principle upon which the practice of receptive music therapy is founded. The term 'receptive music therapy' denotes a process by which patients or participants listen to music with specific intent to therapeutically benefit; and is a term used by therapists to distinguish it from 'active music therapy' by which patients or participants engage in producing vocal or instrumental music.[37] Receptive music therapy is an effective adjunctive intervention suitable for treating a range of physical and mental conditions.[38]
There's no doubt that brainwave entrainment audio is a great technology for anyone who is interested in encouraging altered states of consciousness and it certainly can help people to reach deeper states of relaxation than they might normally have access to. I myself will often listen to brainwave entrainment music in order to enhance my practice of meditation. But let’s keep a balanced perspective, put all the marketing hype to one side for a moment and acknowledge that there is no brainwave entrainment technology in this world that can make you meditate like a Zen monk “at the touch of a button”, despite what some might like you to believe. The mind is NOT a machine. It moves through various states of consciousness in an organic way and at a natural pace. We certainly can guide and accelerate that process with the use of brainwave entrainment audio, but we cannot control it with the same sort of specificity and immediacy as you might control the speed of the car you drive.

Generally speaking, the brain will usually entrain to the strongest stimulus which would be isochronic tones over binaural beats. So when you see people add binaural beats at a different frequency to the isochronic tones, that would not produce additional brainwave entrainment at another frequency. If they are both at the same frequency I haven’t seen any research to indicate whether that would be beneficial or not, but my belief is that it would weaken the potential for entrainment. When you look at the waveform of an isochronic tone there is a distinct empty space between each beat, making it very pronounced and effective. When you add binaural beats at the same frequency it looks like this: http://www.mindamend.com/wp-content/uploads/2017/11/isochronic-tones-binaural-beats-combined-waveform.jpg. The depth of the waveform is now half as deep and less effective. This is before the binaural beats are formed inside your head, where the waveform is hard to determine and measure. From listening to that type of combination the beats sound much less pronounced, which has to make them much less effective in terms of a brainwave entrainment stimulus, compared to isochronic tones on their own.
PPPS. You won’t BELIEVE the amazing change that YOU are about to experience. I’ve seen thousands of individuals undergo powerful shifts in their consciousness as a result of using this program. It’s EMPOWERING, and it’s available right now after 10 years of intensive testing and refining. Discover the magic for yourself! Purchase the CD version, or the download version!
They are a useful and effective tool that allow you a structured means in which to entrain your brain into a desired, new brainwave state using an intended set frequency range of the audio track. Frequency ranges for desired sleep, recovery and deep meditation states to different/higher frequency ranges for performance “flow-states” and high-level focus and calculation.
  There’s an added bonus feature you get with the Brain Evolution System™: scientific studies indicate that brainwave entrainment can not only enhance normal thinking to higher levels, but can also act as a “mood enhancer” to alleviate depression, chronic fatigue, and related conditions – as well as the physical symptoms brought on my too much stress.
The reason I am telling you this is to consider that it is critical for you to seek advice from sources that have wide-spreading experience with brainwave entrainment. Having personally used the technology for over 13 years, in combination with many other more ‘traditional’ methods such as yoga, meditation, visualizations, positive affirmations, NLP, etc., I believe that my personal experiences and the in-depth research I have conducted in order to make sure I approach this safely, can serve as a good starting point for you.
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.
Brainwave entrainment represents a way of using technology to take our meditation and our spiritual practices into territory that has previously been very difficult, if not impossible, for us to venture into. My inspiration for creating the Profound Meditation Program 3.0 was not about just adding binaural beats or isochronic tones to music, using conventional audio entrainment methods to create brainwave patterns, and say, “Hey, this is the next big thing!” To me, it is all about what we can do—even if it’s pulling from way outside of the box—to enable such a profound coherence that we can go to meditative depths that have been practically out of reach. With the Profound Meditation Program 3.0, I wanted to do something that hadn’t been done before, taking the technology to the next level.
There are many sources of binaural beats on the internet and YouTube to check-out and experiment with yourself – I recommend using headphones for optimal effectiveness. However, like most things, not all binaural beats are created equally (especially if they are free on the internet) and therefore not as effective or enjoyable to listen to. This is why I HIGHLY recommend the binaural beats created by master audio technician, music producer and meditation teacher, Cory Allen – which can be found here:
"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.....
I forgot to tell you, after using your meditation for a few weeks, I woke up one morning with the most vivid recollection of having an out of body experience […shortened…] I am hoping to experience this again and control myself the next time. Thank you for enabling me to remember this extraordinary experience. I never believed they were real until I used your program.
Learning: Since performance improves among those with ADHD and cognitive function may be boosted, one may hypothesize that learning would also improve. Those that are struggling to learn as a result of inattentiveness may benefit from stimulation with beta frequencies. Deficits in learning tend to be associated with abnormal or excess slow wave frequencies.
How does brainwave entrainment work? Consistent, precisely engineered audio frequencies in the form of binaural beats cause the brain’s frequencies to match the stimulus. Your brain perceives two beats with slightly different frequencies (which are inaudible to the ear) through your headphones. It takes the difference between the two, and matches its own frequency to it. This is called the “frequency following” response.
FEND OFF negativity, stress or tension in any form – It's no great mystery: Successful people are greater prey for negativity, outside criticism, bitter bystanders, and armchair critics. Jealousy is a powerful emotion. But what if you possessed an emotional "force field" toward this nonsense, and you remained strong and focused regardless what others said? Imagine you being unstoppable...
Want to use it as a serious tool for self-development, long-term meditation support, etc.? Find a supplier that is in alignment with your own values and knows what they are doing. E.g. Holosync have decent entrainment technology, but make ridiculous claims and are very salesy and pushy...  I have tried several and always come back to the Monroe Institute and their well tried and tested sessions, mainly from the gateway experience and lucid dreaming series.

The objectives and inclusion criteria of the review were clear. Relevant sources were searched for studies, although the restriction to published studies in English meant that the review was prone to publication and language biases. The authors did not state whether steps were taken to minimise the risk of bias and error in the processes of study selection and data extraction (for example, by having more than one reviewer independently make decisions). The authors mentioned which studies were blinded, but it did not appear that study validity was systematically assessed, which made it difficult to judge the reliability of the review findings. The decision to combine studies by narrative synthesis appeared appropriate given the strong clinical heterogeneity between the studies, but the authors failed to quantify the size or statistical significance of the findings reported. The evidence presented appeared to justify the authors’ conclusions that further research was justified, but in view of the dearth of good-quality evidence and problems with methodology and reporting in the review, the conclusions regarding efficacy did not appear reliable.

×