I notice that's not the case when I get killed, I always hear some horns

but it's disheartening, especially since they have a significant cost and I've bought many sets and they feel quite broken, and need a big fix.
I've looked through settings and can't find anything, and they do seem to be sporadic - sometimes they work, sometimes they don't, so I don't think I'm doing anything wrong. But on the other hand if I am I'll be happy to learn.
PS if this has been mentioned before then apologies, but I couldn't see anything in search.