About some music instruments

以我既認識:
Horns-喇叭型既樂器
Corded instruments-口琴,,piano個類
Brass-管樂
Loud brass-重音既管樂,姐係trumbone,tuba,horn
High-sounding brass-高音管樂,姐係trumpet個類

those you named are not a particular instrument, but some general terms to describe the instruments:
Horns: 有"喇叭"既樂器, bell-shape出來既地方, 通常係用係銅管樂器上eg. trumpet, trombone, french horn, euphonium, tuba
Brass:銅管樂器
Loud brass:響亮的銅管樂器
High sounding brass:高音的銅管樂器, mainly refers to trumpet/cornet, french horn.