Researchers have learned to send inaudible commands embedded in white noise, music, or even completely different speech, that can fool the ubiquitous voice-recognition phone-home spy devices that are all the rage lately. Inaudible to you, but indelible commands for the devices.
Per The New York Times:
Over the last two years, researchers in China and the United States have begun demonstrating that they can send hidden commands that are undetectable to the human ear to Apple's Siri, Amazon's Alexa and Google's Assistant. Inside university labs, the researchers have been able to secretly activate the artificial intelligence systems on smartphones and smart speakers, making them dial phone numbers or open websites. In the wrong hands, the technology could be used to unlock doors, wire money or buy stuff online — simply with music playing over the radio.
Nicholas Carlini, a fifth-year Ph.D. student in computer security at U.C. Berkeley...and his colleagues at Berkeley have incorporated commands into audio recognized by Mozilla's DeepSpeech voice-to-text translation software, an open-source platform. They were able to hide the command, "O.K. Google, browse to evil.com" in a recording of the spoken phrase, "Without the data set, the article is useless." Humans cannot discern the command. The Berkeley group also embedded the command in music files, including a four-second clip from Verdi's "Requiem."
(Score: 2) by frojack on Sunday May 13 2018, @07:45PM
If you find your Android using excessive battery power, start digging around in settings for all those apps that can access the microphone. You can just turn them all off, and then turn re-enable microphone usage as need arises.
Listening all the time takes a fair bit of power, and usually prevents your phone from sleeping, which takes more power yet.
Where this permission setting is located varies by device, so dig deep.
No, you are mistaken. I've always had this sig.