Invention Grant
- Patent Title: Rotor craft noise cancellation system and method
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Application No.: US18136308Application Date: 2023-04-18
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Publication No.: US12033608B2Publication Date: 2024-07-09
- Inventor: Alan Richard Greenberg
- Applicant: Alan Richard Greenberg
- Applicant Address: US CA Los Angeles
- Assignee: Alan Richard Greenberg
- Current Assignee: Alan Richard Greenberg
- Current Assignee Address: US CA Los Angeles
- Agency: Olivo IP Law Group, P.C.
- Agent John W. Olivo, Jr.
- Main IPC: G10K11/178
- IPC: G10K11/178 ; B64C39/02 ; B64U20/10 ; B64U30/20 ; B64U50/14

Abstract:
Rotor noise cancellation through the use of mechanical means for a personal aerial drone vehicle. Active noise cancellation is achieved by creating an antiphase amplitude wave by modulation of the propeller blades, by utilizing embedded magnets through an electromagnetic coil encircling the propeller blades. A noise level sensor signals the rotor control system to adjust the frequency of the electromagnetic field surrounding the rotor and control the speed of the rotor. An additional method comprises of incorporating a phase lock loop within the control system configured to determine the frequencies corresponding to the rotors and generate corrective audio signals to achieve active noise cancellation.
Public/Granted literature
- US20230377548A1 ROTOR CRAFT NOISE CANCELLATION SYSTEM AND METHOD Public/Granted day:2023-11-23
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