[Code of Federal Regulations] [Title 40, Volume 22] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR211.206] [Page 178] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 211--PRODUCT NOISE LABELING--Table of Contents Subpart B--Hearing Protective Devices Sec. 211.206 Methods for measurement of sound attenuation.