BINAURAL BEATS FREQUENCY RESONANCE MEDITATION & OTHER SOUND TECHNOLOGIES using distinct sound (mostly) plus light and/or touch frequencies to induce various brain waves states. Although generally safe, those with medical conditions (particularly epilepsy, anxiety, depression, bipolar and other psych, neurological or cardiovascular related concerns) please pay particular attention to reading potential therapeutic benefits and what medical conditions or states of mind to avoid using during. Seek professional medical advice if any question or concerns and stop using if negative effects occur. 

See Google Scholar for research on several thousands peer-reviewed research citation involving relaxation, productivity, intelligence, sleep, meditation, mindfulness, brain, heart, etc. benefits of these technologies – that are relatively distinct per frequency and overall approach.

Notes:
– Click on any waves frequency above to be taken to free youtube versions of videos using these technologies.
– Sound version should be used with headphones on.
– Combination sound and light approaches appear most effective, yet also may have potential for greater side effect risk.
– Below are free introductory links available by clicking title of any subtype above (with more established programs linked below)
– Start slow and with alpha wave, Mozart Effect or intro Heart Math methods
– Gradually moving toward more intermediate to advanced practices, if helpful and indicated.
– Stop if any negative effects although these technolgies appear overall relatively safe and effective if following instruction listed here and on various technological links.

Relatively faster and more stimulating frequencies on gross and/or subtle physiological levels. Consider using these practices after familiarity with alpha wave training and/or associated meditative experiences and no apparent as so stated risks to practicing
i. Gamma Waves (~50 or 30 to 100 Hz), a faster frequency that appears during activity including exercise, learning as well as distinct times of sleep and meditation when brain activation, overall tension release, untangling, detoxification, repair and/or rejuvenation occurs. Activating these waves is how teachers subconsciously to consciously motivate others of all ages toward learning. Preliminary MIT and other researchers have shown this frequency to be capable of dissolving beta-amyloid tangles or plaques associated with Alzheimers dementia. Overall helpful for brain repair, likely neuroplasticity associated nerve/brain growth and restorative states of rest, memory, repair and sleep. Therapeutic indications/potential benefits include memory and overall brain support including repair, refinement and growth. Avoid in general and/or use mindful caution (including seeking professional medical advice before using) if diagnosed and/or prone to seizures, syncope [i.e., loss of consciousness], depression, anxiety, cardiovascular, neurological and/or related medical conditions.
ii. Beta Waves (13-40 Hz), a faster frequency common in day to day life including focusing task, prefrontal cortex associated concentration, alertness, awareness and energy. May be a supportive treatment for depression, study, work and other performances. Avoid in general when stressed and if diagnosed or prone to anxiety, bipolar, seizures, heart disease and related. Often, but not always, modern day conditioned people over utilize this frequency with limited contact contact with other healthy frequencies listed here. 

Moderate to slow more relatively relaxing to meditative frequencies that are most gentle and tolerable to most (beginners start here or at Heart Math or Mozart Effect)
iii. Alpha Waves (8-12 Hz), a slower frequency induced during and may be to support experiences of relaxation, relaxed alertness, yoga, meditation, rest and/or preparation for sleep. May be helpful for stress including anxiety and is generally safe for most and can be used during any time of the day when focused relaxation is called for. Natural non-toxic candles such as beeswax and sustainable palm as well as traditional butter and olive oil lamps also flicker at this frequency and may be alternatively used as alternative or added light-inducing version with a rather rich history.

Slower very relaxing including sleep and more advanced meditative associated frequencies. These should generally be used only by more intermediate to advanced practitioners familiar with alpha waves and/or associated meditative practices.
iv. Theta Waves (5-7 Hz), a slower frequency induced during stages of visualization practices, dreaming states of sleep, drowsiness, “a ha” moment of realization and intermediate states of meditation. Helpful for deeper sleep, dream awareness practices, more advanced meditative and related awareness. Avoid in general and/or use with mindful caution including profession supervision with depression, epilepsy, bipolar, schizoprenia and related conditions.  
v. Delta Waves (1 to 4 Hz), a very slow frequency associated with deep sleep associated and some of the scientifically and overall advanced meditation, mindfulness, spirituality and related states. Nondual Vedic text by reputable Shakara, etc. describe the awareness accessed during deep sleep to be synonymous with the nondual awareness goal of all meditation and other mindfulness and spiritual practices. Various neurotransmitters and hormones are modulated and released during these states including lower cortisol, higher melatonin and BDNF brain and overall growth factors plus antiaging associated hormonal effects. Due in part to synchronism of cerebral cortex including prefrontal cortex and deeper brain including hypothalmic and cerebral spinal fluid mechanisms. Caution or avoid in depression, anxiety, epilepsy, other psych, cardiovascular, endocrine and related conditions. 

Other important sound waves and technology supported meditative devices: 
vi. The Mozart Effect which has been shown beneficial in a wide range of learning and performance associated task as well as overall cognition, intelligence, mood, etc. It also has been shown to prevent epileptic seizures. Overall is, and perhaps obviously, another wise place for beginners to start.
vii. Heart Math uses established heart-rate variability associated technologies to support relaxation, stress reduction and a wide range of overall including heart associated health factors.

More research established technologies available for purchase are listed here:
Biocybernaut
Holosync
Gamma wave technology
HeartMath