Commentary for Berakhot 30:14

ואי אשמעינן הלכה כרבי יהודה שאמר משום ר' אלעזר בן עזריה הוה אמינא צריך ואין לו תקנה קמ"ל הלכה כרבי יהודה

And if he had informed us only that the Halakah is in accord with R. Judah's view which he reported in the name of R. Eleazar b. 'Azariah, I might have supposed that it is essential [for the Shema' to be read audibly ab initio] and there was no rectification [if this had not been done]. Therefore he informs us that the Halakah is in accord with R. Judah.

Abraham Cohen Footnotes to the English Translation of Masechet Berakhot