Suandok Sound Therapy (SST) app is an innovative application for emotional therapy and healing through the usage of various and comprehensive components and forms of sound and music, including binaural beats, isochronic tones, superimposed binaural beats, natural sounds, noises, ASMR and voices. The superimposed binaural beat is a new sound frequency unprecedentedly invented by Assoc. Prof. Jakkrit Klaphajone, M.D., via a different synthesis mechanism. Instead of constant carrier sound frequencies, which are used by the conventional binaural beat synthesis, the fluctuating carrier sound frequencies are used and vary over time but the resultant beats still remain constant between each ear. A preliminary research study revealed that this new mechanism is more effective in reducing anxiety than the conventional binaural beats.
SST application can be easily customized for each user and is specifically designed to help individuals with stress, anxiety, depression, concentration problems, confusion, drowsiness, or insomnia. SST app can also complement mental and physical activities, such as meditation and exercises.
People who suffer from seizures, severe heart problems, or uncontrolled schizophrenia should not listen to binaural beats, superimposed binaural beats or isochronic tones as these sounds might worsen the symptoms.
Normally, human brainwaves are in different patterns which be recognized by their amplitudes and frequencies. Brainwaves can then be categorized based on their level of activity or frequency into 4 levels which are beta wave, alpha wave, theta wave, and delta wave. These brainwaves are detectable on specific parts of the scalp, corresponding to the parts of the brain just below. The brain has many specialized regions which correspond to different processes, thoughts, and sensations. Particular brainwaves often reflect distinct regions and networks in the brain communicating with each other.
Research has revealed that alpha wave has something to do with pain perception as people with chronic pain seems to have reduced alpha wave proportion. Alpha brainwave entrainment has been confirmed by previous studies for pain modulation in patients undergoing gastrointestinal endoscopy.
Brainwave entrainment refers to a process of the brain to naturally synchronize its brainwave frequencies with the rhythm of periodic external stimuli, most commonly auditory, visual, or tactile. Commonly used auditory stimuli include isochronic tones, monaural beats and binaural beats or a combination of sounds and lights (audiovisual stimulation). Binaural beats are mostly applied and generated with the different frequencies of carrier sounds between 2 ears. Parts of the sounds are also believed to be travelled via bone conduction. The interference of bilateral sounds is then perceived or possibly neurally propagates with resultant beats from the brainstem up to higher brain regions causing frequency following response leading to certain activity changes.
The application of binaural beat was originally discovered in 1839 by physicist Heinrich Wilhelm Dove. He discovered when carrier sounds of two slightly different frequencies are presented separately, one to each ear, the brain detects the phase variation between the frequencies and tries to reconcile that difference. If the left ear hears a sound with the frequency of 305 Hz and the right does with 295 Hz, the resultant beat generated in the brain is 10 Hz (as shown in the diagram).