At beaches too. Hollywood is based so close to the beach they should know how hard it is to hold a conversation at a normal tone of voice near the ocean
Interesting observation - I've spent my share of time at the beach but that detail doesn't stick in my mind. Maybe I haven't tried to have conversations then.
I've only seen the ocean when visiting family in LA, so I do genuinely wonder if the waves are especially loud and violent there compared to, say the Gulf of Mexico or the US East Coast. But importantly, that is the exact same conditions Hollywood people would be used to too, so they should be very aware of how loud the ocean is (I'd say its comparable to cruising altitude in a standard commercial passenger aircraft)
Last night I walked in when my daughter was watching some show, and I noticed behind the characters who were talking everybody else was dancing, but there was no music at all - not even toned down. Very weird staging lol, like a high school prom for mimes. I've never seen that before.