Sound exposure

Sound measurements
Characteristic
Symbols
 Sound pressure p, SPL, LPA
 Particle velocity v, SVL
 Particle displacement δ
 Sound intensity I, SIL
 Sound power P, SWL, LWA
 Sound energy W
 Sound energy density w
 Sound exposure E, SEL
 Acoustic impedance Z
 Audio frequency AF
 Transmission loss TL

Sound exposure is the integral, over time, of squared sound pressure. The SI unit of sound exposure is the pascal squared second (Pa2·s).

Mathematical definition

Sound exposure, denoted E, is defined by

where

  • the exposure is being calculated for the time interval between times t0 and t1;
  • p(t) is the sound pressure at time t, usually A-weighted for sound in air.

Sound exposure level

Sound exposure level (SEL) is a logarithmic measure of the sound exposure of a sound relative to a reference value.
Sound exposure level, denoted LE and measured in dB, is defined by[1]

where

  • E is the sound exposure;
  • E0 is the reference sound exposure;
  • 1 Np = 1 is the neper;
  • 1 B = 1/2 ln 10 is the bel;
  • 1 dB = 1/20 ln 10 is the decibel.

The commonly used reference sound exposure in air is[2]

The proper notations for sound exposure level using this reference are LW/(400 μPa2⋅s) or LW (re 400 μPa2⋅s), but the notations dB SEL, dB(SEL), dBSEL, or dBSEL are very common, even if they are not accepted by the SI.[3]

References

  1. ^ "Letter symbols to be used in electrical technology – Part 3: Logarithmic and related quantities, and their units", IEC 60027-3 Ed. 3.0, International Electrotechnical Commission, 19 July 2002.
  2. ^ Ross Roeser, Michael Valente, Audiology: Diagnosis (Thieme 2007), p. 240.
  3. ^ Thompson, A. and Taylor, B. N. sec 8.7, "Logarithmic quantities and units: level, neper, bel", Guide for the Use of the International System of Units (SI) 2008 Edition, NIST Special Publication 811, 2nd printing (November 2008), SP811 PDF

Read other articles:

SpiritualSumber alirankaryya musik, himne KristenSumber kebudayaanBudak Afrika di A.S.Alat musik yang biasa digunakanVocalBentuk turunanBlues, musik injil Spirituals (atau Spiritual negro[1][2][3][4][5][6]) adalah musik-musik keagamaan (utamanya Kristen) yang dibuat oleh budak orang Afrika di Amerika Serikat. Terminologi dan asal mula Istilah spiritual berasal dari musik spiritual. Efesus 5:19 berkata: dan berkata-katalah seorang kepada yang lai...

 

Hakim-hakim 21Kitab Hakim-hakim lengkap pada Kodeks Leningrad, dibuat tahun 1008.KitabKitab Hakim-hakimKategoriNevi'imBagian Alkitab KristenPerjanjian LamaUrutan dalamKitab Kristen7← pasal 20 Rut 1 → Hakim-hakim 21 (disingkat Hak 21) adalah pasal kedua puluh satu (dan terakhir) Kitab Hakim-hakim dalam Alkitab Ibrani dan Perjanjian Lama di Alkitab Kristen.[1] Pasal ini berisi kisah usaha orang Israel agar bani Benyamin tetap hidup setelah sebagian besar dibunuh sehubungan d...

 

Callidiini Callidium violaceum Klasifikasi ilmiah Kerajaan: Animalia Filum: Arthropoda Kelas: Insecta Ordo: Coleoptera Famili: Cerambycidae Subfamili: Cerambycinae Tribus: Callidiini Callidiini merupakan suatu tribus dari kumbang tanduk panjang (famili Cerambycidae) subfamilia Cerambycinae. Taksonomi Genus-genus yang termasuk tribus ini meliputi::[1][2] Agada Fairmaire, 1892 Callidiellum Linsley, 1940 Callidium Fabricius, 1775 Calydon Thomson, 1864 Dolomius Fairmaire, 1903 Du...

Об экономическом термине см. Первородный грех (экономика). ХристианствоБиблия Ветхий Завет Новый Завет Евангелие Десять заповедей Нагорная проповедь Апокрифы Бог, Троица Бог Отец Иисус Христос Святой Дух История христианства Апостолы Хронология христианства Ран�...

 

Commune in Brittany, FranceDouarnenezCommuneSeafront of Douarnenez Coat of armsLocation of Douarnenez DouarnenezShow map of FranceDouarnenezShow map of BrittanyCoordinates: 48°05′34″N 4°19′45″W / 48.0928°N 4.3292°W / 48.0928; -4.3292CountryFranceRegionBrittanyDepartmentFinistèreArrondissementQuimperCantonDouarnenezIntercommunalityDouarnenez CommunautéGovernment • Mayor (2020–2026) Jocelyne Poitevin[1]Area124.94 km2 (9.63...

 

Hungarian footballer, manager, and scout The native form of this personal name is Kiprich József. This article uses Western name order when mentioning individuals. József Kiprich Kiprich in 1997Personal informationFull name József KiprichDate of birth (1963-09-06) 6 September 1963 (age 60)Place of birth Tatabánya, HungaryHeight 1.80 m (5 ft 11 in)Position(s) StrikerYouth career Tatabányai BányászSenior career*Years Team Apps (Gls)1980–1989 Tatabányai Bányás...

County in West Virginia, United States County in West VirginiaNicholas CountyCountyThe Nicholas County Courthouse in Summersville in 2007 SealLocation within the U.S. state of West VirginiaWest Virginia's location within the U.S.Coordinates: 38°17′N 80°48′W / 38.29°N 80.8°W / 38.29; -80.8Country United StatesState West VirginiaFoundedJanuary 30, 1818Named forWilson Cary NicholasSeatSummersvilleLargest citySummersvilleArea • Total654 s...

 

Proyecto Gutenberg Información generalDominio https://gutenberg.orgTipo Biblioteca digitalSitio web MediaWikiEditorialSitio webComercial NoRegistro opcionalIdiomas disponibles PlurilingüeEn español NoLicencia UnlicenseGestiónDesarrollador Michael HartOperador Project Gutenberg Literary Archive FoundationLanzamiento 1 de diciembre de 1971EstadísticasRanking Alexa 7573 (2 de octubre de 2017)[editar datos en Wikidata] El Proyecto Gutenberg (PG) fue desarrollado por Michael Hart en...

 

Questa voce o sezione sull'argomento centri abitati della Lombardia non cita le fonti necessarie o quelle presenti sono insufficienti. Puoi migliorare questa voce aggiungendo citazioni da fonti attendibili secondo le linee guida sull'uso delle fonti. Segui i suggerimenti del progetto di riferimento. Urgnanocomune Urgnano – VedutaPanorama della Basella LocalizzazioneStato Italia Regione Lombardia Provincia Bergamo AmministrazioneSindacoMarco Gastoldi (Lista Civica Guar...

Questa voce o sezione sull'argomento attori non cita le fonti necessarie o quelle presenti sono insufficienti. Commento: Fonti insufficienti. Molte informazioni biografiche sono completamente prive di fonti. Puoi migliorare questa voce aggiungendo citazioni da fonti attendibili secondo le linee guida sull'uso delle fonti. Segui i suggerimenti del progetto di riferimento. Michelle Yeoh al Festival di Cannes 2017 Oscar alla miglior attrice 2023 Michelle Yeoh Choo Kheng, nota anche con lo ...

 

2016年美國總統選舉 ← 2012 2016年11月8日 2020 → 538個選舉人團席位獲勝需270票民意調查投票率55.7%[1][2] ▲ 0.8 %   获提名人 唐納·川普 希拉莉·克林頓 政党 共和黨 民主党 家鄉州 紐約州 紐約州 竞选搭档 迈克·彭斯 蒂姆·凱恩 选举人票 304[3][4][註 1] 227[5] 胜出州/省 30 + 緬-2 20 + DC 民選得票 62,984,828[6] 65,853,514[6]...

 

Private university in Chicago, Illinois National Louis UniversityMottoSapientia Dignitas Temperantia [1]Motto in EnglishWisdom Dignity JudgementTypePrivate universityEstablished1886; 138 years ago (1886)Endowment$34.6 million (2020)[2]PresidentNivine MegahedAcademic staff182 full-time and 432 part-time[3]Students7,005[3]Undergraduates3,363[3]Postgraduates3,642[3]LocationChicago, Illinois, United StatesColorsGrey   Blu...

2007 EP by Jake ShimabukuroMy LifeEP by Jake ShimabukuroReleasedSeptember 4, 2007LabelHitchhike RecordsJake Shimabukuro chronology Gently Weeps(2006) My Life(2007) Live(2009) My Life is a 2007 EP by ukulele artist Jake Shimabukuro, released in the U.S. on September 4, 2007, by Hitchhike Records. It was released in Japan on July 18, 2007, by Epic/Sony.[1] The album peaked at number 13 on the Top World Music Albums chart.[2] It won the 2008 Hawaii Music Award for Best Uk...

 

New Testament manuscript Papyrus 𝔓53New Testament manuscriptTextMatthew 26 †; Acts 9-10 †Date3rd centuryScriptGreekFoundEgyptNow atUniversity of MichiganCiteH. A. Sanders, A Third Century Papyrus of Matthew and Acts XVIII (London: 1937), pp. 151-161.TypeAlexandrian text-typeCategoryI Papyrus 53 (in the Gregory-Aland numbering), signed by 𝔓53, is an early copy of the New Testament in Greek. It is a papyrus manuscript containing parts of the Gospel of Matthew and the Acts of the...

 

乔冠华 中华人民共和国外交部部长 中国人民对外友好协会顾问 任期1974年11月—1976年12月总理周恩来 → 华国锋前任姬鹏飞继任黄华 个人资料性别男出生(1913-03-28)1913年3月28日 中華民國江蘇省盐城县逝世1983年9月22日(1983歲—09—22)(70歲) 中华人民共和国北京市籍贯江蘇鹽城国籍 中华人民共和国政党 中国共产党配偶明仁(1940年病逝) 龚澎(1970年病逝) 章含�...

Jetstar Asia Airways IATA ICAO Kode panggil 3K JSA JETSTAR ASIA Didirikan19 November 2004; 19 tahun lalu (2004-11-19)Mulai beroperasi13 Desember 2004; 19 tahun lalu (2004-12-13)Pusat operasiBandar Udara Changi SingapuraProgram penumpang setiaQantas Frequent FlyerArmada7Tujuan25Perusahaan indukWestbrook Investments (51%)Qantas (49%)Kantor pusatBandar Udara Changi SingapuraTokoh utamaBarathan Pasupathi (CEO)Choo Teck Wong, Denis (Ketua)Situs webwww.jetstar.com/sg/en/home Jetstar Asia ...

 

Questa voce sull'argomento cestisti sovietici è solo un abbozzo. Contribuisci a migliorarla secondo le convenzioni di Wikipedia. Segui i suggerimenti del progetto di riferimento. Larisa VinčaitėNazionalità Unione Sovietica Pallacanestro RuoloGuardia Termine carriera1973 CarrieraSquadre di club 1963-1973Kibirkštis Vilnius Nazionale 1967 Unione Sovietica U-201966-1972 Unione Sovietica Palmarès  Mondiali OroBrasile 1971 Il simbolo → indica un trasferimento in prestito. &#...

 

ديفينهيدرامين ديفينهيدرامين الاسم النظامي 2-(diphenylmethoxy)-N,N-dimethylethanamine يعالج شرى،  وداء الحركة،  واضطراب القلق،  وأرق  اعتبارات علاجية اسم تجاري Benadryl, Unisom, Sominex, ZzzQuil, NyQuil ASHPDrugs.com أفرودة مدلاين بلس a682539 فئة السلامة أثناء الحمل A (أستراليا) B (الولايات المتحدة) إدمان �...

Windy Cantika AisahInformasi pribadiLahir11 Juni 2002 (umur 22)Bandung, Jawa Barat, Indonesia OlahragaNegaraIndonesiaOlahragaAngkat besiKelas berat49 kg Rekam medali Angkat besi putri Mewakili  Indonesia Olimpiade Tokyo 2020 49 kg Pesta Olahraga Asia Tenggara Filipina 2019 49 kg Kejuaraan Dunia Junior Heraklion 2022 49 kg Tashkent 2021 49 kg Suva 2019 49 kg AWF Asian Youth & Junior Championships Tashkent 2020 49 kg Pyongyang 2019 49 kg Windy Cantika Aisah (lahir 11 Jun...

 

Côte de Beaune Vue du Montrachet (au milieu) Désignation(s) Côte de Beaune Appellation(s) principale(s) montrachet Type d'appellation(s) AOC Reconnue depuis 1937 Pays France Région parente vignoble de Bourgogne Sous-région(s) vignoble de la côte de Beaune Localisation Côte-d'Or Climat tempéré océanique à tendance continentale Sol argilo-calcaire Superficie plantée 7,80 hectares [1] Cépages dominants chardonnay Vins produits 100 % blancs Production 337 hl [1] Rendement moyen...