The objectives of this manual is to provide for a basic understanding of the elements of the measurement of sound, from motor vehicles in particular and the provisions and requirements of the Federal interstate motor carrier noise regulations, so that the reader is prepared to determine compliance with the regulations in a confident manner.

The objectives of this manual is to provide for a basic understanding of the elements of the measurement of sound, from motor vehicles in particular and the provisions and requirements of the Federal interstate motor carrier noise regulations, so that the reader is prepared to determine compliance with the regulations in a confident manner.

The Code of Federal Regulations is the codification of the general and permanent rules published in the Federal Register by the executive departments and agencies of the Federal Government.