Soothing Vibratory Table

The patent for a table which "pulsates" in syncopation to the music of your choice. I can't quite see how the visual effects are manifested.

a pulsating machine of the above type wherein the frequency of the pulsations is directly proportional to the vibratory effect of the sound waves of a musical selection emanating from a loud speaker forming a part of the present invention...wherein the musical score controlling the pulsations may be played from either a built-in radio or from a phonograph which may be readily connected to the device....which includes vari-colored visual means controlled by the music, permitting the user to see as well as feel the music.

Source.