Noise barrier screen measurements: Single barriers
Abstract
By exercising great care in the experimental procedures, the data spread was kept within a narrow band about 1 dB wide. The results of these experiments indicate that the correct attenuation curve (in decibels vs Fresnel number N) for a point source is given by Fresnel's equations. The results of calculations that convert this point source curve to the incoherent line source (and line source segment) case are also given. The measurements were conducted at two frequencies, 5.19 and 10.019 kHz, and employed a variety of source-to-wall and wall-to-microphone spacings. They were carried out indoors using pulse techniques to eliminate unwanted bounces and reflections.
- Publication:
-
Noise barrier screen measurements: Single barriers. Washington State Highway Department Research Program Report 24.1
- Pub Date:
- June 1975
- Bibcode:
- 1975nbsm.rept.....F
- Keywords:
-
- Highways;
- Noise Reduction;
- Acoustic Measurement;
- Computer Programs;
- Diffraction;
- Screens;
- Walls;
- Acoustics