The present invention relates to devices, systems and methods for controlling and/or amplifying the sound of acoustic emissions from flying vehicles, like drones that are unmanned (UAVs). UAVs UAV might emit a distinctive tone or sound while in flight. This could be due to motor noise or propeller noise. The disclosed embodiments comprise acoustic resonances that can provide additional tones to the UAV’s sound tone. The acoustic resonances may be adjusted or shaped to create additional tones that are pleasing in intervals with the UAV’s tone.

Unmanned autonomous vehicles (UAVs), helicopters, and other propeller-driven vehicles take advantage of rotating propeller blades to supply thrust and/or lift to move. Some listeners might find the distinctive drone or whine of propeller blades annoying due to their high rotation speed.

Musical chords comprise a range of tones comprised of one or more intervals. Chords could have pleasing (consonant) or displeasing (dissonant) characteristics for listeners based on the intervals included in the particular chord. For example major chords that have a major third and a perfect five interval can sound happy or complete. A minor chord could include a minor fifth as well as a perfect fifth, and could be considered “sad,” or “blue.”

Methods and systems described herein pertain to altering the audio-acoustic space around the propeller-driven vehicle. In particular, the propellers of such vehicles may emit a loud, unpleasant whine or drone sound when operating. Natural drone noises could contain at least one fundamental tone. In such a scenario an acoustic resonance device could emit an additional sound that may form an interval, such as a major third or perfect fifth in conjunction with the primary tone. One or more acousticresonators can offer a major chord or a melody, in order to improve the natural sound produced by the propeller-driven vehicle. The methods and systems discussed herein may help to reduce unwanted noise pollution from propeller driven vehicles like UAVs. (UAVs).

In a certain aspect, a device is provided. The device contains at least one propeller. While it is rotating, propeller produces at minimum one sound. At least one acoustic resonance is located near the propeller. The at minimum one acoustic resonator can be set to produce at least one additional tone. The additional tone creates an interval in relation to the minimum of one tone. The interval includes the major third or fifth.

In an aspect the invention, a system is offered. The system is comprised of at least one propeller as well as at least one acoustic resonance that is proximate to at most one propeller. It also contains at least one tuning element that is connected to at least one acoustic resonance and at the very least one sensor. The system additionally includes a controller including at least one processor and memory. The processor executes instructions stored in the memory to perform actions. The operations involve receiving, via the at least one sensor, information indicative of at least one sound emitted by the propeller at least. Based on this information, the operations consist of adjusting at a minimum one tuning element so that the tuned elements and the associated Acoustic Resonator emit one additional tone.

The method is described in an aspect. This method involves causing at least one propeller to to rotate. A minimum of one acoustic resonance is located close to at least one propeller. At least one of the tuning elements is connected to at least one acousticresonator. The method further includes, while at least one propeller rotates and receiving, through at least one sensor information that indicates at least one tone that is emitted from the at least one propeller. Based on the data received the method further involves the adjustment of at minimum one component of the tuning system to ensure that the adjusted tuning element emits at a minimum an additional tone.

The system described is as an aspect. The system comprises various methods to carry out the functions of the various other aspects described herein.

These and additional examples, advantages and embodiments as well as alternate designs will be obvious to anyone with a basic understanding in the field of art after reading this detailed description. Referring to the drawings that accompany it, if applicable, you will see that there are many possibilities for variations. You can, for example, combine structural elements and process steps while still staying within the limitations of the claimed embodiments.

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