To the European reader :
Where an א is written, a vowel is
pronounced. This is frequently A, but can be E, I or O.
In Classic Hebrew, that is less spoken today, the א
is like a brief sound-stop.
Modern speech is less precise.
The Hebrew sign Aleph has become a Greek alpha and a modern A, because the Greeks upon hearing the Phoenicians speak written texts, most frequently perceived the sound A where an Aleph stood written.