noise criteria curve

Directory

References

Discover

United States electoral college map showing number of electoral votes by state.

How Does the Electoral College Work?

Andrew Jackson delivering a speech while on his way to Washington, D.C., for his inauguration in 1829. From Harper's Weekly, 1881.

5 Remarkably Close U.S. Presidential Elections

Election - Button that says Vote. Badge pin stars and stripes politics campaign

Why Are U.S. Elections Held on Tuesdays?

Statue of Nostradamus

Nostradamus and His Prophecies

Washington DC.,USA, April 26, 1989. Supporters for and against legal abortion face off during a protest outside the United States Supreme Court Building during Webster V Health Services

Pro and Con: Abortion

David Cameron. President Barack Obama and Prime Minister David Cameron of the United Kingdom talk during the G8 Summit at the Lough Erne Resort in Enniskillen, Northern Ireland, June 17, 2013

What’s the Difference Between a President and a Prime Minister?

Globe South America, map

What’s the Difference Between Hispanic and Latino?

noise criteria curve

acoustics

Also known as: NC curve

Learn about this topic in these articles:

regulation of noise levels

In noise pollution: Noise regulation and mitigation
These have developed into the noise criteria (NC) and preferred noise criteria (PNC) curves, which provide limits on the level of noise introduced into the environment. The NC curves, developed in 1957, aim to provide a comfortable working or living environment by specifying the maximum allowable level of noise in…
Read More