We found one dictionary that defines the word grow quieter:

Phrases: to grow quieter, more... ▸ Words similar to grow quieter ▸ Usage examples for grow quieter ▸ Idioms related to grow quieter ▸ Wikipedia articles (New!) ▸ Words that often appear near grow quieter ▸ Rhymes of grow quieter ▸ Invented words related to grow quieter