Sound of the Shofar

What do you think of when you listen to the shofar?

While used in ancient times to rally the troops for war (Joshua 6:4) or in a musical accompaniment (Psalms 98:6), Rosh Hashana is referred to has Yom Terura, a day of blowing the shofar, which begs to ask the question, what's the meaning of this sound?

The Rambam highlights a greater purpose to the sounds of the shofar:  "Awake, sleepers from your sleep, and slumberers arise from your slumber!" Once could summarize this approach as the alarm clock for spirituality.

Exodus 19: 16 mentions the blast of the shofar causing the Israelites encamped under Mt. Sinai to tremble in awe.  The shofar also acts like a trumpet to announce the arrival of the King of Kings, bringing the Judge into judgment on Yom Hadin.

I remember hearing from one teacher that the call of the ram's horn is like a primal cry - a plea for repentance or desire or pain.

What do you think of when you listen to the shofar?