柔音号(Flugelhorn)，又译作富鲁格号或是高音号（与中音号、细管上低音号为同一系列），是唯一的高音柔音铜管，音色远较小号柔和为其特色。1990年后之爵士乐亦常用此乐器。许多乐团在法国号人数不足时，用此替代。

The flugelhorn (/ˈfluːɡəl.hɔːrn/—also spelled fluegelhorn, flugel horn, or flügelhorn—from German, wing horn, German pronunciation:[ˈflyːɡl̩hɔʁn]) is a brass instrument that resembles a trumpet but has a wider, conical bore. Some sources falsely consider it to be a member of the saxhorn family developed by Adolphe Sax (who also developed the saxophone). Other historians assert that it derives from the valve bugle designed by Michael Saurle (father) in Munich in 1832 (Royal Bavarian privilege for a "chromatic Flügelhorn" 1832), which predates Adolphe Sax's work.