I'm trying to understand the use of literary devices, and in particular the literary conventions related to metonymy, metaphor and similar figures of speech.
For example, in the following sentence, could "women echoed" be regarded as a valid figure of speech?
The women echoed in my daydreaming.
I'm not sure whether "women" can be thought to echo, when it's actually the sound of the women that causes the echo:
The laughter of women echoed in my daydreaming.
Is this a valid figure of speech or is it an error to call it that? More specifically, is using "women" to represent the sound of laughter an example of metonymy (and is metonymy a subset of metaphor)? If not, can "women echoed" be interpreted as some figure of speech other than metonymy or metaphor, and does it occurring in a daydream affect that interpretation?