{"id":3590,"date":"2025-10-09T11:47:23","date_gmt":"2025-10-09T11:47:23","guid":{"rendered":"https:\/\/www.stalonsilencer.com\/okategoriserad\/vad-ar-ljud-och-hur-mater-vi-det\/"},"modified":"2026-03-02T06:16:59","modified_gmt":"2026-03-02T06:16:59","slug":"vad-ar-ljud-och-hur-mater-vi-det","status":"publish","type":"post","link":"https:\/\/www.stalonsilencer.com\/sv\/guider\/vad-ar-ljud-och-hur-mater-vi-det\/","title":{"rendered":"Vad \u00e4r ljud och hur m\u00e4ter vi det?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>MIL-STD-1474D, den robusta f\u00f6rkortningen som vi f\u00f6rkortar \u00e4nnu mer till MIL-standard. Military Standard \u2013 ja, kalla den vad ni vill \u2013 \u00e4r den nuvarande standarden f\u00f6r att m\u00e4ta ljudniv\u00e5er fr\u00e5n vapen och\/eller ljudd\u00e4mpare. Denna standard anger den exakta proceduren och hur testet ska genomf\u00f6ras f\u00f6r att f\u00e5 ett precist och \u00e4rligt resultat. Vi anv\u00e4nder MIL-STD-1474D f\u00f6r alla v\u00e5ra ljudm\u00e4tningar enligt standarden, och d\u00e4rmed kan vi presentera ett korrekt resultat fr\u00e5n v\u00e5ra ljudd\u00e4mpares ljudm\u00e4tningar.   <\/strong><\/p>\n\n<h2 class=\"wp-block-heading\">HUR MYCKET LJUD KAN EN LJUDD\u00c4MPARE REDUCERA?<\/h2>\n\n<p class=\"wp-block-paragraph\">Att m\u00e4ta ljudniv\u00e5er, eller bullerniv\u00e5er, fr\u00e5n skjutvapen utrustade med ljudd\u00e4mpare kr\u00e4ver omfattande erfarenhet och kunskap. Det typiska ljudet fr\u00e5n ett skjutvapen uppst\u00e5r av tv\u00e5 saker. Den f\u00f6rsta \u00e4r en pl\u00f6tslig frig\u00f6relse av heta drivgaser med h\u00f6gt tryck i loppet, och den andra \u00e4r ljudet fr\u00e5n kulan i flykt (ljudbang).  <\/p>\n\n<p class=\"wp-block-paragraph\">Ljudet fr\u00e5n ljudbangen, allts\u00e5 projektilen som avfyras, uppst\u00e5r p\u00e5 l\u00e5ngt avst\u00e5nd utanf\u00f6r ett skjutvapen och\/eller utanf\u00f6r ett skjutvapen utrustat med ljudd\u00e4mpare och kan inte p\u00e5verkas av ljudd\u00e4mparen. Ljudet fr\u00e5n kulans \u00f6verljudshastighet (ljudbang) eller n\u00e4r kulan tr\u00e4ffar n\u00e5got har en h\u00f6gre ljudniv\u00e5 \u00e4n m\u00e5nga f\u00f6rv\u00e4ntar sig. Detta kan illustreras vid skytte p\u00e5 ett \u00f6ppet f\u00e4lt j\u00e4mf\u00f6rt med skytte i en t\u00e4t skog, d\u00e4r ljudet studsar tillbaka med st\u00f6rre kraft \u00e4n p\u00e5 det \u00f6ppna f\u00e4ltet. Ljudet som genereras n\u00e4r heta drivgaser med h\u00f6gt tryck sl\u00e4pps ut \u00e4r gaser fr\u00e5n sj\u00e4lva krutexplosionen. Dessa gaser har extremt h\u00f6gt tryck och skapar ett impulsljud n\u00e4r de l\u00e4mnar loppet\/pipan och expanderar snabbt till det tryck som r\u00e5der i omgivningsluften. Denna gas kan reduceras med vissa tekniker i en ljudd\u00e4mpare, genom att bromsa och s\u00e4nka gasernas tryck innan de sl\u00e4pps ut i atmosf\u00e4ren (omgivningsluften).     <\/p>\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" data-src=\"https:\/\/cdn.prod.website-files.com\/63bbe6004335da022ec048fd\/6475d3bdc9934aa246a0f70c_Ljudma%CC%88tning-69.jpg\" alt=\"\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" \/><\/figure>\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" data-src=\"https:\/\/cdn.prod.website-files.com\/63bbe6004335da022ec048fd\/6475d42398c68f93e487c182_Ljudma%CC%88tning-55.jpg\" alt=\"\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" \/><\/figure>\n\n<h2 class=\"wp-block-heading\">ETT TILLF\u00d6RLITLIGT RESULTAT<\/h2>\n\n<p class=\"wp-block-paragraph\">Den nuvarande standarden, eller den vanligast anv\u00e4nda standarden, f\u00f6r att m\u00e4ta ljudniv\u00e5er fr\u00e5n skjutvapen \u00e4r MIL-STD-1474D. Stalon AB anv\u00e4nder denna metod f\u00f6r alla ljudm\u00e4tningar med en exakt uppst\u00e4llning enligt standardens villkor. Detta \u00e4r en mycket viktig procedur f\u00f6r att kunna presentera ett precist och korrekt resultat av Stalon-ljudd\u00e4mparnas ljudreduktion.  <\/p>\n\n<p class=\"wp-block-paragraph\"><br\/>MIL-STD-1474D anger den exakta proceduren och hur testet ska genomf\u00f6ras, inklusive typ av ljudniv\u00e5m\u00e4tare, mikrofonpositioner, operat\u00f6rspositioner, omgivning osv. Den anger centrala v\u00e4rden f\u00f6r att genomf\u00f6ra en korrekt m\u00e4tning och f\u00e5 ett tillf\u00f6rlitligt och konsekvent resultat. <\/p>\n\n<p class=\"wp-block-paragraph\">N\u00e5got viktigt att f\u00f6rst\u00e5 n\u00e4r man diskuterar ljudreduktion och j\u00e4mf\u00f6r ljudd\u00e4mpare \u00e4r hur den faktiska ljudm\u00e4tningen utf\u00f6rdes och varf\u00f6r. Vi m\u00e4ter ljudniv\u00e5er enligt g\u00e4llande standard, som vi internt kallar MIL-standard (l\u00e4s mer h\u00e4r). Denna standard anger de exakta positionerna f\u00f6r varje modul och den tekniska utrustning som ska anv\u00e4ndas i testet. Ljud m\u00e4ts med en ljudniv\u00e5m\u00e4tare placerad 100 centimeter och 90 grader till v\u00e4nster om ljudd\u00e4mparens loppmynning. Om ni vill kan ni l\u00e4gga till en referensposition vid \u201dskyttens \u00f6ra\u201d, vilket g\u00f6r resultatet cirka 8\u201310 dBc l\u00e4gre. T.ex. reducerar Stalon VICTOR ljudet till cirka 141 dBc enligt MIL-standard (.308w), men skulle visa 132 dBc m\u00e4tt vid \u201dskyttens \u00f6ra\u201d. XE149 reducerar ljudet till 132,5 dBc vid loppmynningen men skulle visa 123,5 vid \u201dskyttens \u00f6ra\u201d.      <\/p>\n\n<p class=\"wp-block-paragraph\">M\u00e4tning vid \u201dskyttens \u00f6ra\u201d blir ett problem av flera sk\u00e4l. F\u00f6rutom ljudd\u00e4mparens f\u00f6rm\u00e5ga att reducera ljud p\u00e5verkar avst\u00e5ndet mellan m\u00e4taren vid \u201dskyttens \u00f6ra\u201d och ljudd\u00e4mparens mynning resultatet avsev\u00e4rt. T\u00e4nk er en ljudd\u00e4mpare som \u00e4r mycket kort men effektiv, testad med en kort pipa. Denna ljudd\u00e4mpare kommer att j\u00e4mf\u00f6ras med en ljudd\u00e4mpare som \u00e4r betydligt l\u00e4ngre och inte lika effektiv som den andra, och som dessutom testas med en l\u00e4ngre pipa. B\u00e5da resultaten blir missvisande eftersom avst\u00e5ndet mellan m\u00e4taren och mynningen skiljer sig mellan de tv\u00e5 testerna \u2013 kanske till och med ett par decimeter. Resultatet kan till och med visa att den l\u00e4ngre, mindre effektiva ljudd\u00e4mparen har en l\u00e4gre ljudniv\u00e5 \u00e4n den med b\u00e4ttre prestanda.      <\/p>\n\n<p class=\"wp-block-paragraph\">Det som diskuteras ovan kommer att ge olika upplevelser f\u00f6r olika skyttar. Val av kaliber \u00e4r den fr\u00e4msta p\u00e5verkande faktorn, men \u00e4ven pipans l\u00e4ngd g\u00f6r att ljudet upplevs olika. <\/p>\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" data-src=\"https:\/\/cdn.prod.website-files.com\/63bbe6004335da022ec048fd\/646c87277e581d7f6e189382_MIL-STD-1474D-STALON%202023.jpg\" alt=\"\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">Inga artiklar hittades.<\/p>\n\n<h2 class=\"wp-block-heading\">V\u00c5R STANDARD<\/h2>\n\n<p class=\"wp-block-paragraph\">MIL-standard anger tv\u00e5 alternativ f\u00f6r placering av ljudm\u00e4taren (mikrofonen), eller snarare ett (1) med m\u00f6jlighet att l\u00e4gga till en referensposition vid \u201dskyttens \u00f6ra\u201d.<\/p>\n\n<p class=\"wp-block-paragraph\"><br\/>Den f\u00f6rsta, och viktigaste, positionen f\u00f6r ljudm\u00e4taren placeras i 90 graders vinkel, 100 cm till v\u00e4nster om ljudd\u00e4mparens loppmynning. B\u00e5de ljudd\u00e4mparen och ljudm\u00e4taren ska vara 160 cm \u00f6ver kortklippt gr\u00e4s. Denna position visar ljudd\u00e4mparens faktiska ljudreduktion, medan positionen vid \u201dskyttens \u00f6ra\u201d \u00e4r en referensposition f\u00f6r att m\u00e4ta anv\u00e4ndarens, eller \u201dskyttens\u201d, ljudexponering. Om ni vill m\u00e4ta referenspositionen ska ljudm\u00e4taren placeras under samma f\u00f6rh\u00e5llanden som den f\u00f6rsta, men nu vid \u201dskyttens \u00f6ra\u201d och 15 cm fr\u00e5n loppets axel (siktlinjen), p\u00e5 motsatt sida om hylsutkastaren.   <\/p>\n\n<p class=\"wp-block-paragraph\">Positionen vid \u201dskyttens \u00f6ra\u201d tar inte h\u00e4nsyn till pipans och\/eller ljudd\u00e4mparens l\u00e4ngd och resultatet blir oregelbundet och starkt beroende av vapnets l\u00e4ngd och ljudd\u00e4mparens l\u00e4ngd. Ju l\u00e4ngre bort ljudm\u00e4taren \u00e4r fr\u00e5n ljudk\u00e4llan, desto l\u00e4gre blir ljudniv\u00e5erna. Positionen vid \u201dskyttens \u00f6ra\u201d \u00e4r med andra ord inte ett exakt s\u00e4tt att m\u00e4ta en ljudd\u00e4mpares ljudreduktion, men kan anv\u00e4ndas som referens f\u00f6r anv\u00e4ndaren.  <\/p>\n\n<p class=\"wp-block-paragraph\">Alla Stalon-ljudd\u00e4mpare testas och m\u00e4ts enligt MIL-STD-1474D och i 90 graders vinkel, 100 cm till v\u00e4nster om ljudd\u00e4mparens loppmynning. Kvaliteten och konsekvensen i alla v\u00e5ra ljudniv\u00e5m\u00e4tningar \u00e4r d\u00e4rf\u00f6r 100 % korrekt. <\/p>\n\n<p class=\"wp-block-paragraph\">Utrustningen vi anv\u00e4nder \u00e4r f\u00f6ljande:<\/p>\n\n<p class=\"wp-block-paragraph\">M\u00e4tare: Larson Davis LXT1 QPR, digital, h\u00f6g precision (typ 1)<\/p>\n\n<p class=\"wp-block-paragraph\">Detektor: Larson Davis, Peak, h\u00f6gt tryck, intervall: 54 dB till 185 dB<\/p>\n\n<p class=\"wp-block-paragraph\">Mer data i illustrationen ovan.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MIL-STD-1474D, den robusta f\u00f6rkortningen som vi f\u00f6rkortar \u00e4nnu mer till MIL-standard. Military Standard \u2013 ja, kalla den vad ni vill \u2013 \u00e4r den nuvarande standarden f\u00f6r att m\u00e4ta ljudniv\u00e5er fr\u00e5n vapen och\/eller ljudd\u00e4mpare. Denna standard anger den exakta proceduren och hur testet ska genomf\u00f6ras f\u00f6r att f\u00e5 ett precist och \u00e4rligt resultat. Vi anv\u00e4nder MIL-STD-1474D [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3591,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[187],"tags":[],"class_list":["post-3590","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guider"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Vad \u00e4r ljud och hur m\u00e4ter vi det \u2013 SilentFire-guide<\/title>\n<meta name=\"description\" content=\"L\u00e4r er hur ljud definieras, m\u00e4ts i decibel och vilka metoder som anv\u00e4nds f\u00f6r att bed\u00f6ma ljudniv\u00e5er fr\u00e5n skjutvapen. 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