ABSTRACT
This chapter introduces fundamentals and basic terminology of noise control and discusses noise-control strategies for new and existing facilities. It examines the most effective noise-control solutions, the wave equation, plane and spherical waves and sound intensity. The chapter describes units of measurement and presents frequency analysis and sound spectra. Possible strategies for noise control are always more numerous for new facilities and products than for existing facilities and products. Modification of the energy source to reduce the noise generated often provides the best means of noise control. In new facilities and products, quantification of the noise problem at the design stage may range from simple to difficult. Sound is conducted to the ear through the surrounding medium, which in general will be air and sometimes water but sound may be conducted by any fluid or solid. The chapter also presents an overview of the key concepts discussed in this book.
