Homepod owners will now feel safer with the new feature by which Homepod sends notifications when hearing the alarm of the smoke detector or carbon monoxide.
Apple managed to surprise a lot in January 2023, when he announced the launch of the updated model of the first homepod. Besides the appearance of this model, which many people thought permanently withdrawn, Apple announced that so HomePod (2nd generation) as well as the first version of homepod and HomePod Mini, will receive software updates that will add new functions.
One of the most interested, is Sound Recognition, by which Apple recently added the ability to recognize the sounds produced by the smoke detector, CO or fire alarm. When the speakers HomePod They will hear the specific sound of these detectors, will immediately issue a notification on iPhone, iPad, Mac or Apple Watch.
Homepod sends notifications when hears smoke detector alarm or carbon monoxide

“New Safety & Security Features – Sound Recognition detects smoke or carbon monoxide alarm sounds and allows home members to check in during critical events.”
This feature, Sound Recognition It operates similar to the "Hey Siri" command, only instead of the user's voice order, "the order" will be given by the alarms of the smoke detectors, and the users will receive notifications. If you have surveillance cameras added to Homekit, the notification may also include short videos in the home.
Being just about the recognition of sounds (Sound Recognition) and the execution of a simple task, to send an alert, this new feature is available on all three homepod models present at this time. HomePod (1st gen.), HomePod (2nd gen.) and HomePod mini.
It is very possible that Apple will add on Homepod and other features based on Sound Recognition, or why not, actions and automation to interact with Temperature and humidity sensors You have homepod.
Amazon has introduced relatively recently, notification action when a window breaks. Also a safety feature, which can notify users if a burglary entrance takes place.