A Program to Simulate Butterworth Filters on a Digital Computer.

摘要

Filtering of underwater acoustic data is an operation which is typically performed in an analog manner. This operation is limited in flexibility due to the quantity and availability of hardware and limited in acccuracy because of component tolerances, aging and environmental deterioration. It is the purpose of this memorandum to discuss the processing of broad and acoustic data using digital computer filtering on digitized data. This procedure is limited by the need for sampling rates several times the maximum frequency present in the signal, but bypasses the above limitations by allowing the simulation of a large number of filters. The accuracy is improved and further computer processing can be applied to the results.