Some mu'adhdhins elongate the ba in Allahu Akbar until it becomes Akbar; is this permissible?

The Shaykh : He says: Some mu'adhdhins elongate the fathah of the ba in Allahu Akbar until it reaches the point of an alif, so that it becomes Allahu Akbar. Is this permissible? That means, yes, this is not permissible. That is to say, it is not permissible to say Allahu Akbar, because the meaning changes. As for Akbar, they say that it is the plural of kabr, just as asbab is the plural of sabab, and kabr is the drum.