{"id":1806,"date":"2017-02-17T07:15:02","date_gmt":"2017-02-17T07:15:02","guid":{"rendered":"http:\/\/vip.aalbra.dk\/?page_id=1806"},"modified":"2017-02-27T13:45:21","modified_gmt":"2017-02-27T13:45:21","slug":"messingblaeseinstrumenters-akustik-og-virkemaade","status":"publish","type":"page","link":"https:\/\/vip.aalbra.dk\/?page_id=1806","title":{"rendered":"L\u00e6bebl\u00e6seinstrumenter"},"content":{"rendered":"

Akustik og virkem\u00e5de<\/h2>\n

 <\/p>\n

Artiklen er skrevet af prof. Mogens Andresen – tak for tilladelse til at\u00a0bringe den.<\/h6>\n

 <\/p>\n

Messingbl\u00e6seinstrumenterne (i daglig tale messinginstrumenterne) best\u00e5r af et tragtformet MUNDSTYKKE, et R\u00d8R og et KLANGSTYKKE. Ved at \u201csumme\u201d med l\u00e6berne\u00a0og samtidig puste ind i mundstykket, bringes luften i instrumentet i svingninger, og der frembringes en tone. Ved at skifte sp\u00e6ndingen i l\u00e6berne, i luftm\u00e6ngden og i kompressionen, kan man frembringe NATURTONER\u00c6KKEN. Instrumenterne kan derfor ogs\u00e5 betegnes \u201cL\u00c6BEBL\u00c6SEINSTRUMENTER\u201d\"\"<\/p>\n

\"TONER\"<\/a><\/p>\n

Fig.\u00a01 NATURTONER\u00c6KKEN<\/em><\/p>\n

\"\"<\/figure>\n

Messinginstrumenternes\u00a0historie handler langt hen ad vejen om, hvordan man har kunnet udfylde hullerne mellem naturtonerne.\u00a0\u00a0\u00a0Klangen p\u00e5 et messinginstrument afh\u00e6nger af udformningen af mundstykke og instrument.<\/p>\n

\"\"
\n\"MUNDSTYKKE\"<\/a><\/figure>\n

Fig. 2\u00a0 MUNDSTYKKE<\/em><\/p>\n

En st\u00f8rre CUPDIAMETER giver en st\u00f8rre klang, en mindre cup giver en mindre klang.<\/em><\/p>\n

En dybere CUP og en st\u00f8rre BAGBORING giver en m\u00f8rkere klang.<\/em><\/p>\n

En fladere CUP og en mindre BAGBORING giver en lysere klang.<\/em><\/p>\n

\u00a0<\/em><\/p>\n

\"\"\"MUNDSTYKKER\"<\/a><\/figure>\n

 <\/p>\n


\nFig. 3 \u00a0FIRE \u00a0MUNDSTYKKER\u00a0<\/em>\u00a0med samme cupdiameter,\u00a0<\/em>men med forskellig indre udformning<\/em><\/p>\n

A \u2013 mundstykke til en baroktrompet \u2013 giver en h\u00e5rd og sm\u00e6ldende klang<\/em><\/p>\n

B \u2013 mundstykke til en moderne trompet \u2013 giver en rundere og mere fyldig klang<\/em><\/p>\n

C \u2013 mundstykke til en cornet \u2013 giver en bl\u00f8d klang<\/em><\/p>\n

D \u2013 mundstykke til valdhorn \u2013 giver en meget bl\u00f8d og m\u00f8rk klang<\/em>\u00a0<\/em><\/p>\n

\"\"<\/figure>\n

R\u00f8rforl\u00f8bet kan v\u00e6re CYLINDRISK, dvs. at det har samme boring (r\u00f8rdiameter) helt frem til klangstykket.<\/p>\n

Det giver en kompakt, brilliant og lys klang\u00a0 (trompet, trombone\/basun)\"\"\"CYLINDRISK\"<\/a>Fig.\u00a04 \u00a0CYLINDRISK R\u00d8RFORL\u00d8B<\/em><\/p>\n

\"\"<\/p>\n

\u2013 Eller r\u00f8rforl\u00f8bet kan v\u00e6re KONISK, dvs. at boringen udvides hele vejen frem til klangstykket (cornet, fl\u00fcgelhorn, horn, baritone, euphonium og tuba)\"\"<\/p>\n

\"KONISK\"<\/a>Fig. 5 \u00a0KONISK R\u00d8RFORL\u00d8B<\/em><\/p>\n

\"\"<\/figure>\n

Endelig har metal-typen (messing\/kobber\/s\u00f8lv) og metallets tykkelse betydning for klangen.<\/p>\n

\"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

Akustik og virkem\u00e5de   Artiklen er skrevet af prof. Mogens Andresen – tak for tilladelse til at\u00a0bringe den.   Messingbl\u00e6seinstrumenterne (i daglig tale messinginstrumenterne) best\u00e5r af et tragtformet MUNDSTYKKE, et […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1806","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/P60HG2-t8","jetpack-related-posts":[{"id":32,"url":"https:\/\/vip.aalbra.dk\/?page_id=32","url_meta":{"origin":1806,"position":0},"title":"Embouchure","author":"admin","date":"24. april 2015","format":false,"excerpt":"Embouchure\u00f8velser er vigtige for alle messingbl\u00e6sere, for embouchuren kommer ikke af sig selv. Her er eksempler p\u00e5 \u00f8velser. 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