noise criteria curve

Directory

References

Discover

Titanic infographic. The 30th anniversary of its discovery is September 1, 2015. SPOTLIGHT VERSION.

Timeline of the Titanic’s Final Hours

Battle of the Alamo from "Texas: An Epitome of Texas History from the Filibustering and Revolutionary Eras to the Independence of the Republic, 1897. Texas Revolution, Texas revolt, Texas independence, Texas history.

6 Wars of Independence

King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

Two chicks near an egg with a white background (poultry, chick, chickens, birds).

What Do Eggs Have to Do with Easter?

African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.

Timeline of the American Civil Rights Movement

Rural Irish landscape, Sligo, Ireland.

Why Is Ireland Two Countries?

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