Does a HomePod smoke-alarm alert mean it detected smoke?

A speaker hearing the smoke alarm gives that sound another way to reach you. It hasn't measured the air. I'd want that distinction to be obvious before anyone starts treating a quiet phone as reassurance. Apple's existing HomePod guide says Sound Recognition can recognize smoke and carbon monoxide alarm sounds and send a notification to an iPhone, iPad or Apple Watch. The notification identifies the HomePod that heard it. Apple also explicitly says not to rely on Sound Recognition where someone could be harmed, or in high-risk or emergency situations. I like the extra connection to a room when I'm elsewhere. But I'd describe it to a household as an additional notification, not a new smoke detector or a replacement for the home's alarms. No notification doesn't establish that the room is safe. One thoughtful detail: Apple says opening the notification makes HomePod announce to people at home that someone is checking in. Remote listening shouldn't be invisible to the person standing beside the speaker. This is documented behavior, not an alarm-detection test I've run. What does your household think the speaker is actually checking?