A microcomputer-based system for noise characteristics analysis

A description is given of the design and use of a microcomputer-based system for the analysis and prediction of interior noise levels in general aviation aircraft constructed from novel materials. The system consists of a test chamber divided into two parts by a panel which has been fabricated from the material or combination of materials to be tested. A noise generator applies noise to one side of the specimen, while the microcomputer system measures and records the noise spectra on both sides of the specimen, so that its attenuation properties may be calculated and displayed by both a color CRT and X-Y plotter hard copy.