"Finally, Alexa seems to be less responsive on the Sonos One, at least compared to the Echo, meaning you have to speak a little bit louder for it to hear you. Considering my Echo will sometimes pick up an unintended ‘Alexa’ reference while I’m chatting in another room, this probably isn’t as significant a shortcoming as it sounds.
Read more at https://www.stuff.tv/sonos/one/review#RDh9IciKOQwAQ2K0.99
But something that is a concern that Sonos ought to look at, if what you say is more applicable.
Best answer by Ryan S
You should find that Alexa is getting better at listening, with a decrease in the times Alexa speaks up when not called. Alexa on Sonos One is now more likely to carry out your desired action when requested; especially when it’s noisy, when the speaker is further away, or when speaking quietly.
Update within your Sonos app by going to More > Settings > Online Updates.
We’re continuing to work with Amazon and the Alexa team to improve Sonos One voice control. You can expect to see more developments as we go. Let us know what you think of the changes. We’d love to hear from you.