Effectiveness of Predictive Computer Programs in the Design of Noise Barriers: A Before and After Approach: Part I, the Data Acquisition System

Report No: 78-R32

Published in 1978

About the report:

A digital data acquisition system has been designed to meet the need for a long duration noise analysis capability. By sampling the DC outputs from sound level meters, it has been possible to make twenty-four hour or longer recordings, in contrast to the one-hour recordings possible on seven-inch analog tape reels. The system is made up of a digital tape recorder, an analog-to-digital converter, an outdoor microphone unit, a weatherproofed microphone, two B & K sound level meters, and other miscellaneous equipment. It has the capability of recording and analyzing data from up to eight channels in linear or decibel format. The operation of the system in terms of its setup, calibration, and the recording of digitized signals, as well as the computer programs used to analyze the signals, are described in this report. Listings of computer programs and of a sample problem are supplied in the appendixes.

Disclaimer Statement:The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.


  • J. K. Haviland, David F. Noble

Last updated: January 27, 2024

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