Rashi says that they should blow before Moshe like he's a Melech. We see that the idea of : רְצוֹצֲח וֹ ת trumpets is to act in a Malchus’dik way. Later, it says that if you blow with: רְצוֹצֲח וֹ ת trumpets, then יֵנְפִל םֶתְּרַכְּזִנְו 'ה ˄ֱא ֵקםֶכיֵבְיֹאֵמ םֶתְּﬠַשׁוֹנְו םֶכי י ט Hashem will remember you, and save you from your enemies. We can say (at least: ְבּ ֶד ֶר ˂ ֶר ֶמז as a Remez) that if a person acts in a Romemus fashion like a king, then he wins wars and has Yeshuos.
You want to succeed in your private wars i.e., life's challenges, then see yourself as a Melech and then you'll win. Indeed, a human is a Tzelem Elokim, and when he builds himself up and feels Malchus’dik, then he is actually connecting with Hashem Himself. When you look at yourself like a zero nebach, this is the opposite of: ִק י ְר ָב ַל הה' closeness to Hashem, who is the Melech Malchei HaMelochim HaKadosh Baruch Hu.
Those who act like kings and respect themselves, are Davka closer to Hashem who is the Melech of the world. The Ohr HaChaim says that both the Ananei HaKavod (clouds) and the: רְצוֹצֲח וֹת trumpets caused us to move. A cloud is also something high, and is in the air (Romemus). Yet, it's dark, which symbolizes Tzaros. The Shechina was inside the Ananei HaKavod.
The only way to really become great is by meeting life's challenges. סֵסוֹנְתִהְל סֵנּ תהלים ס ו Your Nisayon is a banner. And realizing that Hashem is inside your cloud (and your pain) makes it easier. Rashi says that the Ananei HaKavod flattened out the surface of the Midbar, and got rid of the snakes and scorpions, etc. They were also a Shemira.
Your (dark) Nisyonos get rid of all the mediocrity and the stagnant parts of your existence. They get you activated and moving, to grow and become great. The קוֹל רְצוֹצֲחוֹ ת trumpet blasts and the high clouds get you to think big, instead of being small and worried, and being busy with vicissitudes.
