Attenuation 04 : (1) Reduction in magnitude, amplitude or intensity, arising from absorption or scattering of electric current, radio waves, light waves, etc. (2) Reduction of the virulence of bacteria, viruses, etc
H. J. Porter (Chairman - Technical Committee), Dictionary of Fire Technology, The Institution of Fire Engineers, The Victory Press (Leicester) Ltd. 1979 UK. (Fr Tech - Brit) {81}