OPTICAL PROBING OF PHOTOACOUSTIC PROPAGATION FOR NONCONTACT MEASUREMENT OF FLOWS, TEMPERATURES AND CHEMICAL COMPOSITIONS A. C. Tam, W. Zapka, H. Coufal et B. SullivanJ. Phys. Colloques, 44 C6 (1983) C6-203-C6-207DOI: https://doi.org/10.1051/jphyscol:1983631