Public hearing on the proposed regulations implementing Sections 3001 to 3004 of the Resource Conservation and Recovery Act : February 22-23, 1979, Washington, D.C., transcript.

Includes bibliographical references.

Public hearing on proposed hazardous waste regulations : February 7-9, 1979, New York, New York, transcript.

On cover: Public hearing on the proposed hazardous waste regulations, February 7-9, 1979, New York, New York.

Public hearing on proposed landfill disposal guidelines, Section 1008(a) : May 17, 1979, Houston, Texas, transcript.

Mode of access: Internet.

Agriculture-environmental and consumer protection appropriations.

"Hearing before the subcommittee of the committee on appropriations ... <69th-72d, 75th>-93d Congress."

Nominations of Inez Smith Reid and Eckardt C. Beck [microform] : hearing before the Committee on Environment and Public Works, United States Senate, Ninety-sixth Congress, first session ... October 17, 1979.

Reuse of record except for individual research requires license from Congressional Information Service, Inc.

EPA pesticide regulatory program study [microform] : hearing before the Subcommittee on Department Operations, Research, and Foreign Agriculture of the Committee on Agriculture, House of Representatives, Ninety-seventh Congress, second session, December 17, 1982.

"Serial no. 97-NNNN."

The responsiveness summary of permit decisions for the city of Lake Forest and DK Recycling Systems, Inc.'s landscape waste compost facility and landscape waste transfer station, Lake Forest, Illinois : hearing file no. 325-97.

"January 1998."

Hearing to examine the joint performance of APHIS, U.S. Department of Agriculture, and CBP, U.S. Department of Homeland Security in protecting U.S. agriculture from foreign pests and diseases : hearing before the Subcommittee on Horticulture and Organic Agriculture of the Committee on Agriculture, House of Representatives, One Hundred Tenth Congress, first session, Wednesday, October 3, 2007.

"Serial no. 110-29."

Oversight of the Trade Act of 1988 : hearing before the Committee on Finance, United States Senate, One Hundred First Congress, first session.

Item 1038-A, 1038-B (MF).

Environmental research and development : hearing before the Subcommittee on Toxic Substances and Environmental Oversight of the Committee on Environment and Public Works, United States Senate, Ninety-eighth Congress, first session, June 14, 1983.

Pt. 1 not named as such.

Agriculture-environmental and consumer protection appropriations.

"Hearing before the subcommittee of the committee on appropriations ... <69th-72d, 75th>-93d Congress."

Hearing protectors: a dilemma involving acoustics and personal safety

This thesis is concerned with the optimising of hearing protector selection. A computer model was used to estimate the reduction in noise exposure and risk of occupational deafness provided by the wearing of hearing protectors in industrial noise spectra. The model was used to show that low attenuation hearing protectors con provide greater protection than high attenuation protectors if the high attenuation protectors ore not worn for the total duration of noise exposure; or not used by a small proportion of the population. The model was also used to show that high attenuation protectors will not necessarily provide significantly greater reduction in risk than low attenuation protectors if the population has been exposed to the noise for many years prior to the provision of hearing protectors. The effects of earplugs and earmuffs on the localisation of sounds were studied to determine whether high attenuation earmuffs are likely to have greater potential than the lower attenuation earplugs for affecting personal safety. Laboratory studies and experiments at a foundry with normal-hearing office employees and noise-exposed foundrymen who had some experience of wearing hearing protectors showed that although earplugs reduced the ability of the wearer to determine the direction of warning sounds, earmuffs produced more total angular error and more confusions between left and right. !t is concluded from the research findings that the key to the selection of hearing protectors is to be found in the provision of hearing protectors that can be worn for a very high percentage of the exposure time by a high percentage of the exposed population with the minimum effect on the personal safety of the wearers - the attenuation provided by the protection should be adequate but not a maximum value.