Meaning of のか in this sentence?


The sentence is this one:

> その音に反応したのか、わたしの耳に一つの声が届いた

I kinda understand the connotation that のか has in some sentences, but I just
don't understand it in this particular one.




In this sentence, のか means that the speaker is guessing at a cause. To
translate the sentence, "Perhaps reacting to the sound, I heard a voice." Kind
of a gross translation, but essentially the speaker is guessing that the voice
they hear is from someone vocalizing in reaction to the referenced sound.

