Quotation sobre Salmos 47:6

2 Before one blows one makes the blessing "to hear the sound of the shofar" and makes the blessing "shehecheyanu." Rema: And there is no distinction between blessing for oneself or if one has already fulfilled [the obligation of blessing] and blesses to fulfill the obligation of others. Either way, the one blowing makes the two aforementioned blessings (based on Beit Yosef and Trumat HaDeshen). And one blows Tekiyah Shevarim Truah Tekiyah three times; and Tekiyah Shevarim Tekiyah three times; and Tekiyah Truah Tekiyah three times. Rema: And it's best to blow on the right side if possible to blow this way (Minhagim). And also to direct the shofar upwards as it is said "Raise up G-d with the shofar" (Rokeach and Maharil).

And we sound [the shofar] etc. The reason of the Author regarding this sounding [of the shofar] is because it is a sign to send off the Shechina upwards, as it is said, "God ascends with Truah."