John Douglas Wholahan

Title: The Innovations of John Douglas Wholahan

Introduction

John Douglas Wholahan is an accomplished inventor based in Chicago, IL. He is known for his contributions to the field of electronic musical instruments. His innovative approach has led to the development of a unique patent that enhances the musical experience.

Latest Patents

Wholahan holds a patent for a "Chorus control for electronic musical instrument." This invention involves a circuit designed to electrically modify a musical tone through frequency modulation, creating an ensemble effect. The circuit consists of three series-connected shift registers that function as delay circuits, driven by three high-frequency oscillators. These oscillators are activated by vibrato signals that are out of phase with one another, allowing for a rich chorus effect. The outputs of the shift registers are filtered and recombined, either electrically or acoustically, to produce a fuller sound. Additionally, feedback from the last shift register to the first introduces further phase delay, enriching the audio signal.

Career Highlights

Wholahan is currently associated with Thomas International, Inc., where he continues to innovate in the realm of electronic music technology. His work has significantly impacted the design and functionality of electronic organs and similar instruments.

Collaborations

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Conclusion

John Douglas Wholahan's inventive spirit and technical expertise have made a lasting impact on electronic musical instruments. His patent showcases his ability to blend technology with creativity, enhancing the musical experience for many.