What does the humming grew to a roar like great wind?

The phrase 'the humming grew to a roar like great wind' suggests a gradual increase in intensity and power. It could be used to describe the sound of a crowd, a storm, or any other situation where a low-level humming sound builds into a loud, roaring noise.

Here are a few examples of how the phrase could be used in different contexts:

* The humming of the engines grew to a roar as the plane took off.

* The crowd's humming of anticipation turned into a roar as the show began.

* In a low, humming voice, the speaker began the story. But gradually the humming grew to a roar like great wind, capturing the attention of everyone in the room.

In each of these examples, the phrase 'the humming grew to a roar like great wind' conveys a sense of escalating power, intensity, or excitement.