PNC

PNC
   an abbreviation for preferred noise criterion, a unit used in engineering to measure the level of background noise in rooms or other enclosed spaces.
   Introduced in 1971, the unit is similar to the older noise criterion (NC), but a PNC rating requires lower levels of high and low frequencies than the corresponding NC rating. PNC ratings below 40 are generally required for residential or classroom spaces. PNC ratings are typically 10-15% lower than raw measurements of the sound level in decibels.

Dictionary of units of measurement. 2015.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • PNC — can refer to: * Palestinian National Council * The People s National Congress, a socialist political party in Guyana * PNC Financial Services, Fortune 500 company, its subsidiary bank named PNC Bank, and places it has acquired naming rights to… …   Wikipedia

  • PNC — steht für: Palästinensischer Nationalrat (Palestinian National Council) Partido Nacional Cooperista, mexikanische Partei Partido Nacionalista Canario, spanische politische Partei People s National Congress, guyanische Partei People s National… …   Deutsch Wikipedia

  • PNC — (Palestinian National Council) n. committee of Palestinians that was established to promote national interests …   English contemporary dictionary

  • PNC 3 — Infobox Album Name = PNC 3 Type = album Artist = Partners N Crime Released = January 1, 1996 Recorded = 1995 Genre = Hip Hop Length = Label = South Coast Music Producer = Leroy Precise Edwards For Precise Recordings Reviews = * Allmusic… …   Wikipedia

  • PNC — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom.   Sigles d’une seule lettre   Sigles de deux lettres > Sigles de trois lettres   Sigles de quatre lettres …   Wikipédia en Français

  • PNC — Las letras PNC pueden hacer referencia a: Partido Nacionalista Canario: partido político de Canarias (España); Tierra Comunera Partido Nacionalista Castellano: antiguo nombre del partido político de España Tierra Comunera; Premio Nacional de… …   Wikipedia Español

  • PNC — Policía Nacional Civil (International » Guatemalan) ** Police National Computer (Governmental » Police) * Prenatal Care (Medical » Hospitals) * PNC Bank Corporation (Business » NYSE Symbols) * Pritish Nandy Communications (Business » Firms) *… …   Abbreviations dictionary

  • PNC Financial Services — Group, Inc. Type Public Traded as NYSE: PNC …   Wikipedia

  • PNC Park — Généralités Adresse 115 Federal Street …   Wikipédia en Français

  • PNC Bank Building (Columbus) — PNC Building as seen from Third St. Former names National City General information Type Office/Residential …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”