Welcome to the forum Hermine Dow. Good question and thanks for bringing this up.
H8643 is used 33 times.
Lev 23:24, Lev 25:9, Num 10:5, Num 10:6, Num 23:21, Num 29:1, Num 31:6, Jos 6:5, Jos 6:20, 1Sa 4:5, 1Sa 4:6, 2Sa 6:15, 1Ch 15:28, 2Ch 13:12, 2Ch 15:14, Ezr 3:11, Ezr 3:12, Ezr 3:13, Job 8:21, Job 33:26, Job 39:25, Psa 27:6, Psa 33:3, Psa 47:5, Psa 89:15, Psa 150:5, Jer 4:19, Jer 20:16, Jer 49:2, Eze 21:22, Amo 1:14, Amo 2:2, Zep 1:16
The verses in BOLD contain a reference to a trumpet or shofar.
H8643
תּרוּעה
terû‛âh
BDB Definition:
1) alarm, signal, sound of tempest, shout, shout or blast of war or alarm or joy
1a) alarm of war, war-cry, battle-cry
1b) blast (for march)
1c) shout of joy (with religious impulse)
1d) shout of joy (in general)
Part of Speech: noun feminine
A Related Word by BDB/Strong’s Number: from H7321
H7321
רוּע
rûa‛
BDB Definition:
1) to shout, raise a sound, cry out, give a blast
1a) (Hiphil)
1a1) to shout a war-cry or alarm of battle
1a2) to sound a signal for war or march
1a3) to shout in triumph (over enemies)
1a4) to shout in applause
1a5) to shout (with religious impulse)
1a6) to cry out in distress
1b) (Polal) to utter a shout
1c) (Hithpolel)
1c1) to shout in triumph
1c2) to shout for joy
2) (Niphal) destroyed
Part of Speech: verb
A Related Word by BDB/Strong’s Number: a primitive root
H7782
שׁפר / שׁופר
shôphâr
BDB Definition:
1) horn, ram’s horn
Part of Speech: noun masculine
A Related Word by BDB/Strong’s Number: from H8231 in the original sense of incising
H2689
חצצרה
chătsôtserâh
BDB Definition:
1) trumpet, clarion
Part of Speech: noun feminine
A Related Word by BDB/Strong’s Number: by reduplication from H2690
Shalom