Importance

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Abstract

An ornamental water fountain is artificially illuminated by separate sets of differently colored lamps illuminated by a color blending system that responds to variations in musical tones. In one embodiment, there are three sets of lamps in separate principal colors, namely, red, blue and green, and the intensity of light from each set of lamps is independently controlled during the playing of a musical number, producing a multitude of different colors reflected by the fountain in response to variations in the amplitude and frequency of the musical tones. The color blending system operates in response to an input voltage representative of musical tones produced over a wide range of audio frequencies from a phonograph, tape player, radio receiver, or the like. The input voltage is separately coupled to low pass, band pass and high pass filters for producing separate frequency band signals representative of the content, i.e., combined amplitude and frequency, of the musical tones produced within low, intermediate and high frequency ranges, respectively. The three frequency band signals are fed to separate phase control circuits for independently adjusting power supplied to the different sets of lamps, thereby adjusting the intensity of the lamps in proportion to the content of sound produced within each frequency range.

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First Claim