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2. Hearables - Wikipedia

   en.wikipedia.org/wiki/Hearables

   One was the removal of the 3.5mm audio jack from the iPhone, which was denigrated by many. However, it fundamentally changed the dynamics of the market for wireless headphones. Two additional announcements were a new wireless chip allowing them to enter the world of hearables by launching their own brand of earbuds, known as Airpods.

3. Amazon Echo Buds - Wikipedia

   en.wikipedia.org/wiki/Amazon_Echo_Buds

   Amazon Echo Buds; Developer: Amazon: Product family: Echo: Type: Wireless earbuds: Release date: October 30, 2019 () Input: Echo Buds (each) Dual external beam-forming microphones, single internal microphone, accelerometer, proximity, touch: Connectivity: Echo Buds (each) Bluetooth Charging Case micro-USB port: Dimensions: Echo Buds (each) 22 x ...

4. Equal-loudness contour - Wikipedia

   en.wikipedia.org/wiki/Equal-loudness_contour

   Equal-loudness contour. An equal-loudness contour is a measure of sound pressure level, over the frequency spectrum, for which a listener perceives a constant loudness when presented with pure steady tones. [ 1] The unit of measurement for loudness levels is the phon and is arrived at by reference to equal-loudness contours.

5. Amazon’s Best-Selling Echo Earbuds Are Just $34 Right ... - AOL

   www.aol.com/amazon-stylish-echo-earbuds-just...

   Now, these same Echo Buds are back in an all-new package for 2023 … They were smaller, lighter and more comfortable than the company’s first go at wireless earbuds, for a fraction of the cost ...

6. Reverberation - Wikipedia

   en.wikipedia.org/wiki/Reverberation

   Reverberation (commonly shortened to reverb ), in acoustics, is a persistence of sound after it is produced. [ 1] Reverberation is created when a sound or signal is reflected. This causes numerous reflections to build up and then decay as the sound is absorbed by the surfaces of objects in the space – which could include furniture, people ...

7. Signal-to-noise ratio - Wikipedia

   en.wikipedia.org/wiki/Signal-to-noise_ratio

   Definition. One definition of signal-to-noise ratio is the ratio of the power of a signal (meaningful input) to the power of background noise (meaningless or unwanted input): where P is average power. Both signal and noise power must be measured at the same or equivalent points in a system, and within the same system bandwidth .