If my auditory memory spontaneously improves, what could be the cause?

I tried to learn a Hebrew song this morning cause if I marry my Jewish lover, I want to be able to communicate in his language or understand the prayers at the local synagogue and I can finally remember the phonemes because before I was focused on trying to match the letter sounds with the written letters, since I was not used to reading Hebrew in Hebrew script and I used to rely on English phonetic sounds to explain the pronunciation of Hebrew words, using myEnglish intonation script instead of Hebrew. I also began to remembered Hebrew verses from Genesis I that I tried to learn 14 years ago, and how the vocalization sounds for those words.

If my auditory memory spontaneously improves, what could be the cause?
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