![silent flight edges closer to take off](https://utterbuzz.com/wp-content/uploads/2024/04/silent-flight-edges-closer-to-take-off-640x480.jpg)
A new study reveals how noise is generated and propagated from these engines, technically known as boundary layer ingesting (BLI) ducted fans.
A new study reveals how noise is generated and propagated from these engines, technically known as boundary layer ingesting (BLI) ducted fans.