However, many members of the public were unaware of the practice until the Bloomberg news agency reported the fact earlier this year.
"We are committed to delivering a great Siri experience while protecting user privacy", Apple said in a statement.
Bloomberg first reported in April that Amazon had a team of thousands of workers around the world listening to Alexa audio requests with the goal of improving the software.
Apple and Google, which is now being investigated by Hamburg's data protection authority, have both suspended their programs; Amazon late Friday announced changes to its terms that let users opt out of human review of their recordings.
HSBC chief executive stands down
Some HSBC executives in Asia expressed surprise at the move, saying there had been no indication that a change was afoot. CEO John Flint of HSBC has been in the top job just 18 months but has come to an agreement to part ways with the bank.
United States police say no indication of racial motive in OH mass shooting
The death toll from the two weekend shootings rose to at least 31 on Monday. "We have a lot of evidence still to go through". OH hospital officials say 37 people have been treated for injuries connected to the mass shooting in Dayton over the weekend.
Canada looking closely at US freeze of Venezuelan government assets
Special envoy to Venezuela Elliott Abrams and Commerce Secretary Wilbur Ross are also set to attend the meeting. The sanctions are the latest economic maneuvers targeting the Maduro government since last month when the U.S.
This came after a German privacy watchdog ordered Google to cease manual reviews of audio snippets generated by Google Assistant. Caught red-handed, Google assured the regulator it would not be making any transcripts of speech data in the European Union for at least the next three months. They said the ban will remain in place until they have done a thorough overview of the entire grading process.
The move follows news reports that third-party contractors used by Apple and Google had heard people having sex and discussing private medical information. The company also argued they are already in the process of reviewing their standard practice of letting humans access to Assistant recording after Dutch data leak scandal where even sensitive info spoken to the Assistant, or otherwise got leaked online.
Think your friends would be interested?
Digital assistants or virtual assistants, now voice-enabled, are computer programmes created to assist users by answering questions and performing basic tasks like maintaining calendars, updating them about weather and reading out stories and recipes to them.
But a spokesman for the National Data Protection Commission (CNPD) said that citizens could "file a compliant with our authority or his/her national supervisory authority" if they had concerns.