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2. Equal-loudness contour - Wikipedia

   en.wikipedia.org/wiki/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. By definition, two sine waves of differing ...

3. Absolute threshold of hearing - Wikipedia

   en.wikipedia.org/wiki/Absolute_threshold_of_hearing

   The absolute threshold of hearing ( ATH ), also known as the absolute hearing threshold or auditory threshold, is the minimum sound level of a pure tone that an average human ear with normal hearing can hear with no other sound present. The absolute threshold relates to the sound that can just be heard by the organism.

4. Audiogram - Wikipedia

   en.wikipedia.org/wiki/Audiogram

   Audiogram. An audiogram is a graph that shows the audible threshold for standardized frequencies as measured by an audiometer. The Y axis represents intensity measured in decibels (dB) and the X axis represents frequency measured in hertz (Hz). [1] The threshold of hearing is plotted relative to a standardised curve that represents 'normal ...

5. Technics EAH-AZ70W true wireless earbuds review - Engadget

   www.engadget.com/technics-eah-az70w-review-true...

   The Technics EAH-AZ70W true wireless earbuds do some things very well, but the audio quality can be hit or miss. It’s difficult to bring too many design flourishes to true wireless earbuds, but ...

6. AirPods Pro Adaptive Audio preview: Automatically adjusting ...

   www.engadget.com/airpods-pro-adaptive-audio...

   Thanks to the H2 chip in the AirPods Pro, the earbuds use a combination of computational audio and machine learning algorithms that can discern between consistent and transitory noise. The ...

7. Researchers developed 3D-printed sensors that can record ...

   www.engadget.com/researchers-developed-3d...

   Researchers at the University of California San Diego have figured out a way to turn everyday earbuds into high-tech gadgets that can record electrical activity inside the brain. The 3D screen ...