Noise measurement being standardized

In the following 2 articles, recent progress in noise measurement and its standardization is outlined. In the first, P. L. Alger, chairman of the A.I.E.E. committee on sound, points out the practical significance of preliminary standards for noise measurements approved June 26, 1933, by the American Standards Association, and indicates the lines of further progress required to bring noise measurements into general use. In the second article, Harvey Fletcher, chairman of the A.S.A. sectional committee on acoustical measurements, presents the formal report of that committee which contains the proposed standards and a résumé of pertinent discussion thereon. These standards provide a universal language for sound measurements in general, and a foundation for future standards of noise meter calibration and apparatus noise measurements. Members of the Institute are urged to review these new possibilities in sound measurement and to put them into practical use. Comments and criticisms of the proposed standards are solicited by the committees.