1. ANSI/ASA S1.18-2010, 2010. Method for determining the acoustic impedance of ground surfaces. Accredited Standards Committee S1, Acoustics. American National Standard (Revision of ANSI S1.19-1999).
2. Acoustical impedance models for outdoor ground surfaces;Attenborough;J Sound Vib,1985
3. Outdoor ground impedance models;Attenborough;J Acoust Soc Am,2011
4. Bérengier M, Garai M. A state-of-the-art of in-situ measurement of the sound absorption coefficient of road pavements. In: International congress of acoustics, Rome, Italia; 2001.
5. Outdoor sound propagation: a short review on analytical and numerical approaches;Bérengier;Acta Acust United Acust,2003