We found one dictionary that defines the word increase in volume:

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