Company Filing History:
2 out of 74 
2 out of 786 
2 out of 142 Years Active: 1994-1996
Title: Mary E Dungan: Innovator in Aircraft Noise Control
Introduction
Mary E Dungan is a notable inventor based in Malden, SC (US). She has made significant contributions to the field of aircraft noise control, holding 2 patents that focus on innovative solutions to reduce engine noise.
Latest Patents
One of her latest patents is titled "Active control of aircraft engine inlet noise using compact sound." This invention presents an active noise control system that utilizes a compact sound source to effectively reduce aircraft engine duct noise. The system employs an adaptive filtered-x LMS algorithm to control the fan noise from a turbofan engine. It features single multi-channel control systems that manage the fan blade passage frequency (BPF) tone and its harmonics. Additionally, a multi-channel control system is designed to control both fan tones and a high-pressure compressor BPF tone simultaneously. The technology incorporates a compact sound source made up of an array of identical thin, cylindrically curved panels, which are flush mounted inside the inlet duct to minimize aerodynamic losses. Each panel is driven by piezoelectric force transducers, maximizing the response when driven at its resonance, typically between 2000-4000 Hz.
Career Highlights
Mary has worked with esteemed institutions such as Virginia Polytechnic Institute and State University and Virginia Tech Intellectual Properties, Inc. Her work has significantly advanced the field of noise control in aviation.
Collaborations
Some of her notable coworkers include Ricardo A Burdisso and Chris R Fuller.
Conclusion
Mary E Dungan's innovative work in aircraft noise control showcases her dedication to improving aviation technology. Her contributions continue to influence the industry and pave the way for future advancements.