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2. Noise-canceling microphone - Wikipedia

   en.wikipedia.org/wiki/Noise-canceling_microphone

   The internal electronic circuitry of an active noise-canceling mic attempts to subtract noise signal from the primary microphone. The circuit may employ passive or active noise canceling techniques to filter out the noise, producing an output signal that has a lower noise floor and a higher signal-to-noise ratio. Applications. Call center headsets

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. iPhone 14 Pro - Wikipedia

   en.wikipedia.org/wiki/IPhone_14_Pro

   Built in rechargeable lithium ion battery MagSafe wireless charging up to 15W Qi wireless charging up to 7.5W Charging via USB to computer system or power adapter Fast-charge capable: Up to 50% charge in around 30 minutes with 20W adapter or higher (available separately)

5. Noise reduction - Wikipedia

   en.wikipedia.org/wiki/Noise_reduction

   Noise reduction is the process of removing noise from a signal. Noise reduction techniques exist for audio and images. Noise reduction algorithms may distort the signal to some degree. Noise rejection is the ability of a circuit to isolate an undesired signal component from the desired signal component, as with common-mode rejection ratio .

6. ‘I’ve had 16 free batteries’: This Florida woman used ...

   www.aol.com/finance/ve-had-16-free-batteries...

   ‘I’ve had 16 free batteries’: This Florida woman used lifetime warranties to continually replace parts on her car for 43 years. Here’s how you can save money with a similar strategy

7. Wireless microphone - Wikipedia

   en.wikipedia.org/wiki/Wireless_microphone

   Singer Cody Simpson using a wireless microphone headset in a 2013 concert in Montreal. A wireless microphone, or cordless microphone, is a microphone without a physical cable connecting it directly to the sound recording or amplifying equipment with which it is associated. Also known as a radio microphone, it has a small, battery-powered radio ...