Laugh is the sound you make when you laugh, and it is also a noun: we can have a laugh, and we can have a few laughs. So why not be able to say you can hear this laugh? Does it seem wrong to say the following? Is there a reason for this?
I like the sound of this laugh of the children?
I like the sound of children's laugh
Best Answer
Yes, you can hear a laugh.
Your examples sound wrong, however. I think the word laughter would be a better choice there. The first one also has issues with how you're using this.
Why doesn't laugh sound right in your examples? Probably because one definition of laugh is:
Children refers to more than one child, so laugh (under that definition) doesn't fit. This definition of laughter would be appropriate:
Hearing laughs
Like I said, it can be idiomatic to say you hear laughs. Or a singular laugh.
For example:
In addition, these two sentences are equivalent in meaning, and both are grammatical:
Note that your title (Can we hear laugh?) is not grammatical because it requires an article (Can we hear a laugh? is grammatical).
"Having a laugh"
It's also important to realize that this expression is not entirely literal:
So you can also say you "heard someone having a laugh", but this is different than just hearing a laugh.