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2. Infrared blaster - Wikipedia

   en.wikipedia.org/wiki/Infrared_blaster

   An infrared blaster (IR blaster) is a device that relays commands from a remote control to one or more devices that require infra-red remote control. For instance, it may also allow radio-frequency-based (RF) remotes (including those using Bluetooth) to control infra-red-based components.

3. Walmart's secret sale room is the perfect place for last ...

   www.aol.com/lifestyle/walmarts-secret-sale-room...

   Walmart's secret sale room is the perfect place for last-minute gift shopping — all arrive by Christmas Heather Quinlan and Rory Halperin Updated December 20, 2023 at 10:02 AM

4. What 'secret' loudspeaker codes mean at department stores - AOL

   www.aol.com/news/2010-10-13-what-secret...

   Walmart security watches shoppers enter on Black Friday This "code" is one of many innocuous sounding secret codes that stores use to alert employees to problems without distracting you from shopping.

5. The Walmart Cyber Monday Sale Is Overflowing with Deals on ...

   www.aol.com/walmart-black-friday-sale-started...

   The Walmart Cyber Monday Sale opened up for early access on Nov. 11 at 12 p.m. ET for Walmart+ members. No worries if you missed it, though. You can still start shopping:

6. Radio-frequency identification - Wikipedia

   en.wikipedia.org/wiki/Radio-frequency_identification

   Active RFID tags have the potential to function as low-cost remote sensors that broadcast telemetry back to a base station. Applications of tagometry data could include sensing of road conditions by implanted beacons, weather reports, and noise level monitoring. [116] Passive RFID tags can also report sensor data.

7. Noise generator - Wikipedia

   en.wikipedia.org/wiki/Noise_generator

   Zener diode based noise source. A noise generator is a circuit that produces electrical noise (i.e., a random signal). Noise generators are used to test signals for measuring noise figure, frequency response, and other parameters. Noise generators are also used for generating random numbers. [1]

8. Long-range acoustic device - Wikipedia

   en.wikipedia.org/wiki/Long-range_acoustic_device

   An NYPD LRAD on top of a police humvee An LRAD operator wearing hearing protection LRAD on a navy ship. A long-range acoustic device (LRAD), acoustic hailing device (AHD) or sound cannon is a specialized loudspeaker that produces sound at high power for communicating at a distance.

9. Noise (electronics) - Wikipedia

   en.wikipedia.org/wiki/Noise_(electronics)

   Different types of noise are generated by different devices and different processes. Thermal noise is unavoidable at non-zero temperature (see fluctuation-dissipation theorem), while other types depend mostly on device type (such as shot noise, [1] [3] which needs a steep potential barrier) or manufacturing quality and semiconductor defects, such as conductance fluctuations, including 1/f noise.