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2. Walmart patents surveillance tool that can eavesdrop on workers

   www.engadget.com/2018-07-12-walmart-patent-audio...

   The audio surveillance system Walmart designed is composed of several sensors that can collect all kinds of audio data, including beeps and the rustling of paper bags. Any data it gathers can be ...

3. Researchers built a low-cost camera system that recreates ...

   www.engadget.com/optical-microphone-camera-laser...

   Researchers at Carnegie Mellon University have developed a camera system that can seemingly detect sound vibrations with a level of precision that makes it possible to recreate the audio without ...

4. Comparison of analog and digital recording - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_analog_and...

   With analog, this comes in the form of outboard hardware components, and with digital, the same is typically accomplished with plug-ins in a digital audio workstation (DAW). A comparison of analog and digital filtering shows technical advantages to both methods. Digital filters are more precise and flexible.

5. Wireless security camera - Wikipedia

   en.wikipedia.org/wiki/Wireless_security_camera

   Wireless security cameras are closed-circuit television (CCTV) cameras that transmit a video and audio signal to a wireless receiver through a radio band. Many wireless security cameras require at least one cable or wire for power; "wireless" refers to the transmission of video/audio. However, some wireless security cameras are battery-powered ...

6. NSA warrantless surveillance (2001–2007) - Wikipedia

   en.wikipedia.org/wiki/NSA_warrantless...

   e. NSA warrantless surveillance — also commonly referred to as " warrantless-wiretapping " or " -wiretaps " — was the surveillance of persons within the United States, including U.S. citizens, during the collection of notionally foreign intelligence by the National Security Agency (NSA) as part of the Terrorist Surveillance Program. [ 1]

7. The best outdoor security camera - Engadget

   www.engadget.com/2019-10-13-the-best-outdoor...

   For a fee, you can add person, animal, and vehicle detection and more cloud-based video storage. The Google Nest Cam IQ Outdoor is the most technologically advanced outdoor camera we've tested. It ...