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2. What Happens to Your Brain When You Listen to Binaural Beats

   www.aol.com/happens-brain-listen-binaural-beats...

   Takeaway. In other words, the idea is that listening to binaural beats can trigger or elicit certain brain states, such as focus or a reduction in pain when listened to at certain frequencies.

3. Soundcore Sleep A10 review: Super-small earbuds to help ... - AOL

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   Soundcore Sleep A10: The sound and the fury. These aren't just for nighttime use; the A10 earbuds can play music, podcasts and the like from any app on your phone. While that adds value to the ...

4. Absolute threshold of hearing - Wikipedia

   en.wikipedia.org/wiki/Absolute_threshold_of_hearing

   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 ...

5. Noise-cancelling headphones - Wikipedia

   en.wikipedia.org/wiki/Noise-cancelling_headphones

   Several countries and states have made it illegal to wear headphones while driving or cycling. [13] It is not uncommon to get a pressure-like feeling when using noise-cancelling headphones initially. This is caused by the lack of low-frequency sounds as being perceived as a pressure differential between the inner and outer ear. [14] [15] [16]

6. The Very Best Earplugs for Sleeping, According to Sleep ... - AOL

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7. Head-related transfer function - Wikipedia

   en.wikipedia.org/wiki/Head-related_transfer_function

   HRTF filtering effect. A head-related transfer function (HRTF) is a response that characterizes how an ear receives a sound from a point in space. As sound strikes the listener, the size and shape of the head, ears, ear canal, density of the head, size and shape of nasal and oral cavities, all transform the sound and affect how it is perceived, boosting some frequencies and attenuating others.