The scope of ISO Technical Committee 43 ‘‘Acoustics,’’ together with its Subcommittees ‘‘Noise’’ and ‘‘Building Acoustics’’ comprises standardization in the whole field of acoustics, i.e., the measurement of sound, its generation, transmission, and reception as well as its effects on Man and the environment. Close liaison is maintained with related international and regional standardization committees, especially IEC/TC 29, which is responsible for electroacoustic standards. ISO standards elaborated by TC 43 are equally addressed to a variety of parties, such as industry, regulatory authorities, trade and consumer groups, research institutes, testing laboratories and consulting engineers, health and safety inspectors, audiologists, and communication experts. Representatives of these groups from 24 different countries contribute actively to its work. More than 120 standards have been published so far and the present program of work includes nearly 80 projects for new or revised standards. In the past few years, major emphasis was laid on the measurement of machinery noise and the measurement and rating of sound insulation in buildings and of building products, both in the context of recent regional legislation. Fields like environmental noise, transport noise, noise prediction, and simplified measurement methods for building acoustics are considered to be future priority areas.