33: Muzak listening, and Alexa eavesdropping

<p>We have two stories this week: first, the surprising history "elevator music." Turns out, Muzak was a real company. And then we reveal how much Amazon's Alexa and other smart speakers are really listening — and remembering what we do and say.</p><p>Sign up for our newsletter: <a href="http://newsletter.businessinsider.com/join/brought-to-you-by" target="_blank">http://newsletter.businessinsider.com/join/brought-to-you-by</a></p>