One issue that always comes up whenever drones and eVTOLs are discussed is noise, and how the proliferation of these machines will make for very loud skies.

Whisper Aero is a company which is aiming to tackle this problem with it’s own proprietary electric ducted fans, and as you can probably guess by their name, they are aiming to be extremely quiet compared to regular electric jet engines.

The aerospace company, which has former NASA engineers working there, has been using what they call a specialized computational framework when developing their engines, which allows them to design specifically with acoustics in mind.

https://aviationweek.com/aerospace/emerging-technologies/whisper-aero-targets-defense-first-ultraquiet-electric-propulsion
https://www.whisper.aero/
https://twitter.com/whisperaero