>"Illegal exhaust and boom boxes are a law enforcement issue. e.g. compare Santa Ana with Irvine."
And here nothing is done about it, and it won't change.
>"Dogs are subject to ultrasound, easy to manage."
Not easy when not your dogs. Trust me, I tried.
>"And the sirens are new to me. You are suggesting that running the siren when going to fire is unnecessary? Or that agencies without need run their sirens?"
Yes. I estimate 75% of the time they are running with sirens unnecessarily; the lights are enough. In fact, often the sirens just scare people and are actually counter productive. They are a major source of unnecessary noise pollution. Many studies corroborate this.