The speed at which sound travels in a given medium under specified conditions. (https://www.btb.termiumplus.gc.ca citing NATO glossary of terms and definitions : (English and French) = Glossaire OTAN de termes et définitions : (anglais et français). --
North Atlantic Treaty Organization. Military Agency for Standardization. Bruxelles : OTAN, 1998. / Bruxelles : OTAN, 1998.)
