Rosh Hashanah in the Torah is described as a day of teruah, a reference to one of the two types of blasts: a regular horn blast (tekiah) and a teruah blast. Interpreters ancient and modern understand the distinction as differing in sound, length, or pitch, but the biblical description of the shofar blowing during the siege of Jericho implies that the nature of a teruah lies in the people’s response to the blast.
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