Ma Dayou or Dah-You Maa (Chinese: ???; March 1, 1915 – July 17, 2012) was a Chinese acoustical physicist, specializing in various aspects of acoustics, especially sound generation, transmission and absorption.
Academician of Chinese Academy of Sciences (CAS), Ma was a research professor at Institute of Acoustics of CAS; Chairman of Chinese National Acoustics Standardization Technical Committee; and Editor-in-Chief of Chinese Journal of Acoustics.