@misc{indiciae7c4bce3c7bfe,
  title = {Active control of fan-generated plane wave noise},
  author = {Gerhold, Carl H. and Nuckolls, William E. and Santamaria, Odillyn L. and Martinson, Scott D.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19940010008},
  note = {Source identifier: 19940010008}
}