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2. Noise-canceling microphone - Wikipedia

   en.wikipedia.org/wiki/Noise-canceling_microphone

   In a noisy environment, both microphones receive noise at a similar level, but the primary mic receives the desired sounds more strongly. Thus if one signal is subtracted from the other (in the simplest sense, by connecting the microphones out of phase) much of the noise is canceled while the desired sound is retained.

3. Active noise control - Wikipedia

   en.wikipedia.org/wiki/Active_noise_control

   Active noise control ( ANC ), also known as noise cancellation ( NC ), or active noise reduction ( ANR ), is a method for reducing unwanted sound by the addition of a second sound specifically designed to cancel the first. The concept was first developed in the late 1930s; later developmental work that began in the 1950s eventually resulted in ...

4. Adaptive noise cancelling - Wikipedia

   en.wikipedia.org/wiki/Adaptive_noise_cancelling

   Adaptive noise cancelling. Adaptive noise cancelling is a signal processing technique that is highly effective in suppressing additive interference or noise corrupting a received target signal at the main or primary sensor in certain common situations where the interference is known and is accessible but unavoidable and where the target signal ...

5. Michigan air quality map: Check if it's bad today in your area

   www.aol.com/michigan-air-quality-map-check...

   Michigan air quality map: Check if it's bad today in your area. Gannett. Kristi Tanner, Detroit Free Press. May 18, 2024 at 8:57 AM. ... Some of these pollutants are so small, PM2.5, ...

6. Fed typically waits for a crisis to make 'inter-meeting' cuts ...

   www.aol.com/fed-typically-waits-crisis-inter...

   The calls for the Fed to do so before its next meeting on Sept. 17-18 got louder Monday during the worst one-day rout for the stock market since 2022. There is a "strong case to act before ...

7. Heat wave shatters records as blistering temperatures ... - AOL

   www.aol.com/news/heat-wave-shatters-records...

   The sweltering heat wave gripping parts of the U.S. has shattered heat records, sparked an air quality health advisory, and is believed to have contributed to at least five deaths.. More than 130 ...