English: One who reads the Shema must make it audible to his own ears, as it is said “Hear, O Israel…”
On the daf / in context: “Shema” is taken to mean both “understand” and “hear”; therefore the words must be spoken aloud enough for the reciter himself to hear them. Bedieved one still fulfills the obligation even without audible volume.
Type of Learning
Diyuk of the verb “Shema” as requiring audible self-hearing.
What Is Learned
Keri’as Shema must be recited aloud enough that the reader’s own ears hear the words; silent thought alone is insufficient lechatchilah.