The revelation at Mount Sinai reaches a dramatic peak, accompanied by powerful sounds that fill the people with deep awe. Among the storm, the blast of a horn grows continuously louder. This phenomenon defies the natural laws of the world. Normally, when a person blows a horn, their breath gradually runs out and the sound weakens. At Sinai, however, the sound miraculously grew stronger and stronger [רש״י, הדר זקנים, בכור שור]. The blast began softly and increased in volume out of God's mercy for the people. This gradual increase allowed their ears to adjust and prevented them from being overwhelmed by terror [אבן עזרא, רש״י]. Another perspective suggests that this was not a physical musical instrument at all, but rather the roaring of a fierce wind blowing through the mountains, which echoed like a massive horn [קאסוטו].
At the heart of this storm, a profound dialogue defines the unique nature of Moses as a prophet. As Moses spoke, God answered him. One approach views this exchange as the moment the Torah was transmitted to the Israelites. Because the people could not endure the overwhelming power of God's voice during the giving of the Ten Commandments, Moses acted as an intermediary, voicing and explaining the laws to them [רש״י, נחלת יעקב]. This raises a practical question of how millions of people spread across a vast camp could hear a single human voice, especially over the deafening blast of the horn. The answer lies in divine assistance. God granted Moses superhuman strength, amplifying his voice so it could reach the ears of the entire nation [רש״י, רבנו בחיי, צאינה וראינה]. Beyond physical volume, God also granted Moses profound intellectual clarity, enabling him to understand and translate the sublime concepts hidden within the divine voice [הכתב והקבלה]. This extraordinary support was designed to firmly establish the authority of Moses to deliver both the written and oral traditions to Israel for all future generations [העמק דבר, מלבי״ם].
A second approach understands this interaction not as the delivery of the commandments, but as an intimate conversation between Moses and God that took place beforehand. Moses stood on the mountain offering praise or asking questions, and God answered with instructions [רמב״ן, אור החיים, שד״ל]. Because of the roaring storm and the loud blast of the horn, God had to respond with a massive, powerful voice so that Moses could hear Him [רשב״ם, חזקוני, קאסוטו]. Alternatively, some suggest that only Moses heard God's response, as his prophetic focus was so absolute that the deafening noise around him was completely tuned out [אבן עזרא]. Other commentators emphasize that the entire nation actually heard God answering Moses. This public miracle, with the divine voice echoing clearly in their ears, served a crucial purpose. It was designed to publicly validate Moses, proving the truth of his prophecy before the eyes of all Israel [רלב״ג, אור החיים].