Born Ann-Margaret Olsson in Stockholm, Sweden on April 28, 1941, the redhead who would one day be known simply as Ann-Margret spent the first five years of her life in her native country before her electrician father was offered a job in stateside.
The one exception is if it you only hear your carbon monoxide detector beeping every minute or two, which could be a low-battery warning signal. In those cases, you should immediately replace the battery, and if there is no battery present, you should call emergency services just to be safe and exit your residence.
Many of these can be combined with carbon monoxide detectors. Carbon Monoxide is an odourless, tasteless and invisible gas, meaning you can be killed by it before you even know it existed. Combined smoke alarms can protect from this as well as smoke particles.