Not only is Alexa listening when you speak to an Echo smart speaker, an Amazon employee is potentially listening, too. Amazon (AMZN) employs a global team that transcribes the voice commands captured after the wake word is detected and feeds them back into the software ... Bloomberg reports. Amazon reportedly employs thousands of full-time workers and contractors in several countries, including the United States, Costa Rica and Romania, to listen to as many as 1,000 audio clips in shifts that last up to nine hours. The audio clips they listen to were described as "mundane" and even sometimes "possibly criminal," including listening to a potential sexual assault. In a response to the story, Amazon confirmed to CNN Business that it hires people to listen to what customers say to Alexa. Amazon doesn't "explicitly" tell Alexa users that it employs people to listen to the recordings. Amazon said in its frequently asked question section that it uses "requests to Alexa to train our speech recognition and natural language understanding systems." People can opt out of Amazon using their voice recordings to improve the software in the privacy settings section of the Alexa app. Alexa auditors don't have access to the customers' full name or address, but do have the device's serial number and the Amazon account number associated with the device. Amazon previously has been embroiled in controversy for privacy concerns regarding Alexa.