A research program to reduce interior noise in general aviation airplanes

Analytical and semi-empirical methods for determining the transmission of sound through isolated panels and predicting panel transmission loss are described. Test results presented include the influence of plate stiffness and mass and the effects of pressurization and vibration damping materials on sound transmission characteristics. Measured and predicted results are presented in tables and graphs

PATTERNS AND PREDICTORS OF ECONOMIC DEVELOPMENT POWER IN LOCAL GOVERNMENT: A POLICY PERSPECTIVE ON ISSUES IN ONE STATE

The purpose of this paper is to examine patterns and predictors of local government economic development in one state. The approach uses data from local governments and various statistical analyses to derive common dimensions of local government power and examine predictors of these dimensions. The results suggest that state policies on development strat-egies have to be developed and effectively exercised to increase the power of the local government in the multiple constituent network. Copyright 1987 by The Policy Studies Organization.