Out of Phase
Woith, Blake F.
Abstract ~ A subliminal recording includes both subliminal message and mask signals applied to both tracks of a two track recording medium. The subliminal message signals are identical in content, and are recorded in an out-of-phase relationship.

The mask signals are recorded in phase. The resulting recording may be utilized in the conventional manner for subliminal recordings.
By combining the composite signals in an inverted relationship, the mask signals cancel while the subliminal message signals are additive, thus allowing the presence of the subliminal message signal to be confirmed on the recording.


USP # 5,221,962 (June 22, 1993)
Subliminal Device having Manual Adjustment of Perception Level of Subliminal Messages
Backus, Alan L., et al.
Abstract: A method and apparatus for presenting subliminal visual and/or audio messages which allows user verification of message content and presence, as well as proper adjustment of message obviousness while accounting for ambient conditions and user sensitivities is disclosed.

This method and apparatus also presents synchronized reinforced sensory input of subliminal messages. This is performed by simultaneously overlaying images received from a VCR over a plurality of television signals.
This apparatus directs overlay images over RF television signals having both audio and video components


USP # 5,215,468 (June 1, 1993)
Method and Apparatus for Introducing Subliminal Changes to Audio Stimuli
Lauffer, Martha A., et al.


Abstract ~ A method and apparatus for introducing gradual changes to an audio signal so that the changes are subliminal.

The changes can involve tempo and volume, for example, and can take the form of a gentle gradient having ever increasing/decreasing ramp-like changes over a sufficient duration, or a more complex program involving several gentle gradients.

In the preferred embodiment, an enhanced audio play-back device such as a portable audio cassette recorder can be programmed to subliminally alter the characteristics of a standard pre-recorded tape containing music, for example.

As a motivational tool during walking, jogging or other repetitive exercise, the tempo is gradually increased over a period of time to encourage a corresponding gradual (and subliminal) increase in physical exertion by a user whose rate of movement is proportional to the tempo of the music.

The tempo can be either manually changed in conjunction with a subliminal program, or by itself in an override mode, or by itself in a version of the present-inventive audio play-back device which allows only manual tempo alternation.

In an alternate embodiment, a special pre-recorded tape contains subliminal changes in tempo, for example, for play-back on a standard audio cassette recorder (which operates at one speed, only) to cause the same effect as the preferred embodiment.


USP # 5,213,562 (May 25, 1993)
Method of Inducing Mental, Emotional and Physical States of Consciousness...
Monroe, Robert A.
Abstract: A method having applicability in replication of desired consciousness states; in the training of an individual to replicate such a state of consciousness without further audio stimulation; and in the transferring of such states from one human being to another through the imposition of one individual's EEG, superimposed on desired stereo signals, on another individual, by inducement of a binaural beat phenomenon.



USP # 5,194,008 (March 16, 1993)
Subliminal Image Modulation Projection and Detection System and Method
Mohan, William L., et al.
Abstract ~ Weapon training simulation system including a computer operated video display scene whereon is projected a plurality of visual targets. The computer controls the display scene and the targets, whether stationary or moving, and processes data of a point of aim sensor apparatus associated with a weapon operated by a trainee.

The sensor apparatus is sensitive to non-visible or subliminal modulated areas having a controlled contrast of brightness between the target scene and the targets. The sensor apparatus locates a specific subliminal modulated area and the computer determines the location of a target image on the display scene with respect to the sensor
apparatus


USP # 5,175,571 (December 29, 1992)
Glasses with Subliminal Message
Tanefsky, Faye, et al.
Abstract ~ A pair of subliminal imaging spectacles is provided with a
matched pair of visual subliminal images designed and placed so as to merge
into one image due to the stereoscopic effect of human vision and thus to
impart a subliminal message to the wearer.


USP # 5,170,381 (December 8, 1992)
Method for Mixing Audio Subliminal Recordings
Taylor, Eldon, et al.
Abstract ~ Audio subliminal recordings are made in which in addition to using a primary carrier, such as music, two audio channels are used to deliver subliminal messages to the brain.

On one channel, accessing the left brain hemisphere, the message delivered is meaningfully spoken, forward-masked, permissive affirmations delivered in a round-robin manner by a male voice, a female voice and a child's voice.

On the other channel, accessing the right brain, directive messages, in the same voices, are recorded in backward-masked (or meta-contrast).

The three voices are recording in round-robin fashion with full echo reverberation.
The audio tracks are mixed using a special processor which converts sound frequencies to electrical impulses and tracks the subliminal message to synchronize the subliminal message in stereo with the primary carrier.
The processor maintains constant gain differential between the primary carrier and the subliminal verbiage and, with the subliminal verbiage being recorded with round-robin, full echo reverberation, ensures that none of a message is lost.
The primary carrier should be continuous music without breaks or great differences in movements.


USP # 5,159,703 (October 27, 1992)
Silent Subliminal Presentation System
Lowery, Oliver
Abstract: A silent communications system in which nonaural carriers, in the very low or very high audio frequency range or in the adjacent ultrasonic frequency spectrum, are amplitude or frequency modulated with the desired intelligence and propagated acoustically or vibrationally, for inducement into the brain, typically through the use of loudspeakers, earphones or piezoelectric transducers.


USP # 5,151,080 (September 29, 1992)
Method & Apparatus for Inducing & Establishing a Changed State of Consciousness
Bick, Claus
Abstract: An electroacoustic device includes a sound generator as well as a system for producing synthetic human speech, connected to a modulation stage for superimposing the output signals thereof.
The superimposed output signals are applied via an amplifier stage to one of a headphone system or loudspeaker system.


USP # 5,135,468 (August 4, 1992)
Method & Apparatus of Varying the Brain State of a Person by Means of an Audio Signal
Meissner, Juergen P.
Abstract: A method of varying the brain state of a person includes the steps of supplying the first audio signal to one ear of the person, supplying a second audio signal to the other ear of the person, and substantially continuously varying the frequency of at least one of the first and second audio signals to vary the brain state of the person.


USP # 5,134,484 (July 28, 1992)
Superimposing Method & Apparatus Useful for Subliminal Messages
Willson, Joseph
Abstract: Data to be displayed is combined with a composite video signal.

The data is stored in a memory in digital form. Each byte of the data is read out in sequential fashion to determine: the recurrence display rate of the data according to the frame sync pulses of the video signal; the location of the data within the video image according to the line sync pulses of the video signal; and the location of the data display within the video image according to the position information.

Synchronization of the data with the video image is derived from the sync pulses of the composite video signal. A similar technique is employed to combine sound data with an audio signal.
Data to be displayed may be presented as a subliminal message or may persist for a given time interval. The data may be derived from a variety of sources including a prerecorded or live video signal. The message may be a reminder message displayed upon a television screen to remind the viewer of an appointment. The data may be stored in a variety of different memory devices capable of high speed data retrieval. The data may be generated locally on-line or off-line and transferred to memory which stores the data necessary to create the message.



USP # 5,128,765 (July 7, 1992)
System for Implementing the Synchronized Superimposition of Subliminal Signals
Dingwall, Robert
Abstract ~ An apparatus and system for the controlled delivery of a subliminal video and/or audio message on to a source signal from a video tape player or similar.
The source signal is divided into audio and video portions.
A video processor reads sychronization information from the source signal. A controller transmits a stored subliminal image at designated times to a mixer amplifier fully synchronized with the source signal.
Concurrently, an audio subliminal message is applied to the source audio at a volume level regulated at some fraction to the source audio. The combined signals are transmitted to a monitor for undistracted viewing.


USP # 5,123,899 (June 23, 1992)
Method & System for Altering Consciousness
Gall, James
Abstract: A system for altering the states of human consciousness involves the simultaneous application of multiple stimuli, preferable sounds, having differing frequencies and wave forms. The relationship between the frequencies of the several stimuli is exhibited by the equation g 3D
s.sup.n/4 .multidot.f where: f 3D frequency of one stimulus; g 3D frequency of the other stimuli of stimulus; and n3Da positive or negative integer which is different for each other stimulus.


USP # 5,052,401 (October 1, 1991)
Sherwin, Gary
Product Detector for a Steady Visual Evoked Potential Stimulator and Product Detector
Abstract ~ An automated visual testing system is disclosed which presents an alternating steady state visual stimulus to a patient through an optical system that modifies the stimulus image. As the image changes, the patient produces evoked potentials that change. The evoked potentials are detected by a product detector which produces the amplitude of the evoked potentials.

The product detector includes filters which isolate the patient's evoked potentials, a modulator which detects the response using the stimulus source frequency and a demodulator that determines the amplitude of the response.
The product detector detects the level of the steady state evoked potential signals even in the presence of substantial background noise and extraneous electroencephalograhic signals.

These detectors can be used to monitor the evoked potential produced by visual, aural or somatic steady state stimuli.
The components described above can be used to produce a system that can determine to which of several different displays an observer is paying attention by providing images that blink at different frequencies and product detectors for each of the stimulus frequencies. The product detector producing the highest output indicates the display upon which the observer is focused.



USP # 5,047,994 (September 10, 1991)
Supersonic Bone Conduction Hearing Aid and Method
Lenhardt, Martin, et al.
Abstract ~ A supersonic bone conduction hearing aid that receives conventional audiometric frequencies and converts them to supersonic frequencies for connection to the human sensory system by vibration bone conduction.

The hearing is believed to use channels of communications to the brain that are not normally used for hearing.
These alternative channels do not deteriorate significantly with age as does the normal hearing channels.
The supersonic bone conduction frequencies are discerned as frequencies in the audiometric range of frequencies.


USP # 5,036,858 (August 6, 1991)
Method & Apparatus for Changing Brain Wave Frequency
Carter, John L., et al.
Abstract: A method for changing brain wave frequency to a desired frequency determines a current brain wave frequency of a user, generates two frequencies with a frequency difference of a magnitude between that of the current actual brain wave frequency and the desired frequency but always within a predetermined range of the current actual brain wave frequency, and produces an output to the user corresponding to the two frequencies.
One apparatus to accomplish the method has a computer processor, a computer memory, EEG electrodes along with an amplifier, a programmable timing generator responsive to the computer processor for generating the two frequencies, audio amplifiers and a beat frequency generator driving a visual frequency amplifier.

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