The ShofarThere are three kinds of notes.
The tekiah is a single blast.
The shevarim is a set of three blasts.
The teruah is a set of nine very short blasts.
During the shofar service the ba'al tekiah blows three notes in different combinations as they are called out. At the end of the shofar service, a very long tekiah , the tekiah gedolah is blown.
When it is time to blow the shofar, the whole congregation stands. They recited the blessing for the mitzvah of hearing the shofar :
Baruch atah, Adonai elohainu, melech haolam, ahshair keedshanu bimetzvotav vtzevanu leeshmoah kol shofar
Blessed are You, Adonai our God, Ruler of the universe, who makes us holy with mitzvot and calls us to hear the sound of the shofar.
Baruch atah, Adonai elohainu, melech haolam, shehecheyanu vikeemanu v'heegeanu lozzmon hazeh.
Blessed are You, Adonai our God, Ruler of the universe, for giving us life, for sustaining us, and for enabling us to reach this season.
