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Patent No. 5215468 Method and apparatus for introducing subliminal changes to audio stimuli

 

Patent No. 5215468

Method and apparatus for introducing subliminal changes to audio stimuli (Lauffer, et al., Jun 1, 1993)

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.

Notes:

SUMMARY OF THE INVENTION

The following are objects of the present invention in view of the above.

A first object of the present invention is to provide a method and apparatus for, during physical activity, motivating a user to change the rate of his or her physical activity while receiving subliminally changing audio stimuli, the physical activity being synchronized to the audio stimuli.

A second object of the present invention is to provide a method and apparatus for, during physical activity, motivating a user to change the intensity of his or her physical activity while receiving subliminally changing audio stimuli, the physical activity being synchronized to the audio stimuli.

A third object of the present invention is to satisfy the first and second objects of the present invention by use of a specially modified audio play-back device in conjunction with a standard pre-recorded audio storage device.

A fourth object of the present invention is to satisfy the first and second objects of the present invention by use of a standard audio play-back device in conjunction with a specially recorded audio storage device having subliminal variations.

A fifth object of the present invention is to satisfy the first through third objects of the present invention by allowing the user to program the subliminal changes to the audio stimuli.

A sixth object of the present invention is to satisfy the fifth object of the present invention by programming the subliminal changes to the audio stimuli via a pluggable module used to modify a standard, but compatible audio play-back device, so that the audio play-back device functions in a conventional manner when the module is unplugged.

A seventh object of the present invention is to satisfy the first through sixth objects of the present invention using audio stimuli primarily of a musical nature.

An eighth object of the present invention is to satisfy the first through sixth objects of the present invention using audio stimuli primarily of a cadence nature.

A ninth object of the present invention is to satisfy the first through third and fifth through eighth objects of the present invention with the ability to create and store complex programs.

A tenth object of the present invention is to satisfy the first through ninth objects of the present invention using any type of audio play-back device--for example, tape player, compact disk player, radio, etc.--whether or not "portable".

There is provided, in accordance with the present invention, an audio signal reproduction apparatus for producing an output aural signal related to an input audio signal which includes: receiver means for receiving the input audio signal and outputting a receiver output signal which is a version of the input audio signal with altered identifiable characteristics; transducer means connected to the receiving means for converting the receiver output signal into and output aural signal; and control means connected to the receiver means for programmably controlling, via control signals input by a user, at least a gradual alteration of the input audio signal over at least a portion of the duration of the input audio signal so that the alteration is subliminal.

There is also provided, in accordance with the present invention, an audio signal reproduction method for producing an output aural signal related to an input audio signal which includes the steps of: receiving the input audio signal and outputting a receiver output signal which is a version of the input audio signal with altered identifiable characteristics; converting the receiver output signal into and output aural signal; and programmably controlling, via control signals input by a user, at least a gradual alteration of the input audio signal over at least a portion of the duration of the input audio signal so that the alteration is subliminal.

There is further provided, in accordance with the present invention, a pre-recorded audio signal storage device which includes storage means for storing an input audio signal having identifiable characteristics, wherein at least one identifiable characteristic is gradually altered over at least a portion of the duration of the input signal so that the alteration is subliminal.

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Alternate Embodiment

It is desirous to practice the present invention when an exerciser does not have one of the above-described audio motivation apparatuses 100. In that case, a similar effect can be achieved by specially recording an audio tape or other audio storage device to include subliminal changes, and playing the tape on a constant-speed prior art audio play-back device. For example, during recording of the tape at a recording studio, the tempo of the music being recorded can be gradually increased so that the change is subliminal. This latter approach, however, is inferior to the preferred embodiment since the user is restricted to the pre-recorded changes, and does not have the ability to program any changes.

It is possible, however, to fuse a combination of the preferred and alternate embodiments which also provide the user with some programmability.

Variations and modifications to the present invention are possible given the above disclosure. However, all such variations and modifications are intended to be within the scope of the invention claimed by this letters patent. For example, the volume of a radio receiver can be subliminally increased or decreased either during physical activity as a motivation tool, or subliminally decreased during inactivity as a sleep aid. Additionally, the present invention need not be limited to a training tool, but can also be used while participating in an athletic event such as running a marathon race, or by disc jockeys to subliminally stimulate dancers.


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