https://techcrunch.com/2018/10/18/alexas-new-whisper-mode-goes-live/

At Amazon’s Alexa event last month in Seattle, the company teased a new feature soon coming to its voice assistant: the ability to whisper. The company demonstrated how whispering a request – like “play a lullaby” – to Alexa would trigger the voice assistant to respond in kind. Today, Amazon says Whisper Mode is officially going live.

The feature is now rolling out to users in the U.S., the company tells us, and works in U.S. English.