DAVID PAL (Discontinued)

NOTE: The DAVID PALTM has been discontinued. For an alternative, please consider the DAVID Delight or DAVID Delight Plus.  

The DAVID PALTM is very portable, compact and lightweight.  It will fit into your shirt or jacket pocket (approximate dimensions - 2.5" x 1" x 3.5" (7 cm x 2.5 cm x 3.5 cm).  Perfect for people who are on the go!  It includes all of our most effective and favorite preset sessions.  All of the sessions also include heart rate variability (HRV) to help you learn to breathe as you relax.  

The DAVID PALTM is also programmable (with the DAVID Session Editor) so that you can design your own sessions.  It can also track previously played sessions.  

To ensure safe, gentle and effective audio-visual entrainment (AVE), the DAVID PALTM offers the following:


        Please note:  a 9 volt adapter is available at an extra cost.

See our Comparison Chart to help you decide which DAVID is right for you!

For the first time ever, a system exists where meditative breathing may be paced along with an audio-visual entrainment (AVE) session. Long, graceful breathing cycles have been used as part of meditation. Scientifically, this technique has been analyzed and shown to settle down a stressed autonomic nervous system. Both sympathetic (flight-or-fight) activity and para-sympathetic (the brain’s efforts to compensate) activity settle down dramatically using HRV techniques.

The heart speeds up with every breath in and slows down with every breath out. This swing in heart rate is HRV. A typical heart beat swing is in the order of about 15 beats per minute (bpm). When people get stressed, the heart typically clamps to sometimes as low as five bpm HRV at times intermixed with sharp spikes in heart rate. This is all abnormal activity and is rough on the heart.

The HRV technique used clinically is based on a 10 second breathing cycle (six breaths/minute, by inhaling slowly for five seconds and exhaling slowly for five seconds in an easy, relaxed breath). When using HRV paced breathing, listen to the heartbeat generated by the DAVID PALTM through the headphones. Inhale for two heartbeats and exhale for two heartbeats (not your own heartbeats!). Most sessions begin at seven breathing cycles/minute (28 heartbeats/min) and slow to six breaths /minute (24 heartbeats/min). This allows the user to breathe a little faster at the onset of a session until he/she has had time to relax.

For more information about HRV, click here and read the "Tech Talk".

Using flashing lights and pulsing tones, we can gently and safely guide the brain into various brainwave states. This is commonly known as audio-visual entrainment or brainwave entrainment. 

These brainwave patterns are typically grouped into four different categories: Beta, Alpha, Theta and Delta. Each of these brainwave patterns is associated with various states of mind.

Beta Waves are quick, low amplitude waves of 14 to 40 times per second (Hz). Beta brainwave patterns are generated naturally when in an awake, focused and alert state of consciousness.

Alpha Waves are between 8 and 13 Hz and occur during sensorial rest (eg. when the eyes are closed), intellectual relaxation, deep relaxation or meditation.  Alpha brainwave rhythms produce: peaceful feelings, warm hands and feet, a sense of well-being, improved sleep, improved academic performance, increased productivity in the workplace, reduced anxiety and improved immune functioning. It is believed that many creative geniuses, such as Einstein, were in a semi-permanent Alpha state.

Alpha/Theta Border are the Schumann Resonance and the State Five Meditation sessions. At the Alpha/Theta border (7 to 8 Hz), exceptional insights and personal transforming experiences can occur.

Theta Waves are between 4 and 8 Hz and are commonly referred to as the dream or "twilight" state. Theta is associated with hypnogogic states, REM and dreaming. Memory development is enhanced in this state. In the Theta brainwave state, memory is improved (particularly long term memory), and access to unconscious material, reveries, free association, sudden insight and creative ideas is increased.

Delta Waves are observed when in a sleeping state. As we fall asleep the dominant natural brainwave becomes Delta. Delta waves are the slowest of brainwaves spanning from 1 to 4 Hz in frequency. There is growing evidence that individuals may maintain a slightly conscious state while in Delta.

Designed for the DAVID PAL, PAL36 and PAL36 with CES, the DAVID Session Editor is graphics software that allows for any type of session to be designed and downloaded into your PAL. The DAVID Session Editor is available  at an additional cost.  It provides programmability for all functions such as: rates, volume, intensity, tones, number of replays, etc. It includes a complete library of preset sessions to use as templates to help you design your own sessions. The library also includes an "erase all" PAL wave file - for any clinician to install a "prescription" of only the sessions that the clinician wants the client to use. Clinicians can also set the number of times a session can be played. After all of the sessions have been played, the client would need to return to the clinician for a "refill". This allows the clinician to closely monitor which sessions are being used and how often they are being used.

Add-on & replacement accessories are available for all DAVID models. Click here to see the DAVID accessories.

To see medical research on audio-visual entrainment (AVE) click here.

Can't decide which model? Click here.

For more information on HRV click here and read the "Tech Talk".

For information on brainwaves and QEEG click here and read the "Tech Talk".

For more information about audio-visual entrainment (AVE), we recommend the following books: