Mapping Heavy Vehicle Noise Source Heights for Highway Noise Analysis (2017) / Chapter Skim
Currently Skimming:
Pages 78-80
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 78... ...
78 Conclusions The primary conclusions from the Phase I and II measurements of heavy-duty trucks were (1) tire/pavement noise was the predominant noise source for heavy-duty trucks; (2)
|
From page 79... ...
Conclusions and Suggested Research 79 • The variation of vertical profiles for the limited number of individual medium trucks was greater than that for heavy trucks. • The beamforming array used in this research provided better resolution and dynamic range than previous NCHRP and Caltrans studies.
|
From page 80... ...
80 Mapping Heavy Vehicle Noise Source Heights for Highway Noise Analysis Lower Speed Heavy Truck Database Expansion For heavy trucks operating at speeds below about 50 mph, the existing REMELs curve for interrupted/grade operation is well above the average measured in this research. There is also considerable scatter in the data points compared to trucks above 50 mph.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.