Nanjing University of Aeronautics and Astronautics Submits Patent Application for Noise Reduction Earmuff and Method for Preserving Voice

Media coverage

• Title	Nanjing University of Aeronautics and Astronautics Submits Patent Application for Noise Reduction Earmuff and Method for Preserving Voice
  Media name/outlet	Global IP News. Aerospace Patent News
  Country/Territory	India
  Date	9/10/25
  Persons	Jian Liu