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2. 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 ...

3. Adaptive noise cancelling - Wikipedia

   en.wikipedia.org/wiki/Adaptive_noise_cancelling

   Adaptive noise cancelling is an unorthodox 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 and the ...

4. List of discontinued Bose headphones - Wikipedia

   en.wikipedia.org/wiki/List_of_discontinued_Bose...

   Sound and Vision annual award for "Best Noise Cancelling Headphones". [citation needed] QuietComfort 35 QuietComfort 35 II. The "QuietComfort 35" (QC35) over-ear wireless headphones were sold from 2016 until 2018, as a Bluetooth headset based on the QuietComfort 25 model. The QC35s could be used without Bluetooth as wired headphones, and the ...

5. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

6. Headphones - Wikipedia

   en.wikipedia.org/wiki/Headphones

   Headphones that use cables typically have either a 1 ⁄ 4 inch (6.4 mm) or 1 ⁄ 8 inch (3.2 mm) phone jack for plugging the headphones into the audio source. Some headphones are wireless, using Bluetooth connectivity to receive the audio signal by radio waves from source devices like cellphones and digital players.

7. National conventions for writing telephone numbers - Wikipedia

   en.wikipedia.org/wiki/National_conventions_for...

   As with the landline home numbers, the mobile numbers' middle three-digit part is extended to four digits (e.g., 016490641) due to the increased number of mobile phone users. Business numbers. If a number starts with 070, the number does not belong to any particular area, and is a number given by an Internet telephone service.