M. Sasajima and  M. Watanabe and  T. Yamaguchi and  Y. Kurosawa and  Y. Koike,  Acoustic Analysis with Consideration of Damping Effects of Air Viscosity in Sound Pathway.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2013, vol. 78(6). 1327 - 1332
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/8614.