And, from the article:
He said the Wasabi smoke detector was tested on 14 people, including four deaf people. Except for one person with a blocked nose, all woke up within two minutes of the smell reaching them.
"Minimal Olfactory Perception During Sleep: Why Odor Alarms Will Not Work for Humans"
https://www.vinparleur.net/IMG/pdf/Why_odor_alarms_will_not_...
And, from the article:
He said the Wasabi smoke detector was tested on 14 people, including four deaf people. Except for one person with a blocked nose, all woke up within two minutes of the smell reaching them.