@misc{27376,
  author = {Randall Wagner},
  title = {NIST System for Measuring the Directivity Index of Hearing Aids under Simulated Real-Ear Conditions},
  year = {2013},
  number = {118},
  month = {2013-01-24},
  publisher = {Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/jres.118.005},
  language = {en},
}