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2. 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.

3. Take 20% Off Raycon Earbuds, Headphones and Speakers ... - AOL

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   These Basic Earbuds. The Work Earbuds Classic. Raycon. For everyday wear that’s easy to take in and out, these buds are the perfect pick! See it! Get The Work Earbuds Classic (originally $120 ...

4. Hearing protection device - Wikipedia

   en.wikipedia.org/wiki/Hearing_protection_device

   The cups should be fit so that the center of the ear canal aligns with the ear canal opening. The soft cushions seal around the pinna of the ears. The head band, centered at the top of the head, applies force/pressure to seal the ear cups over the ears. Earplugs. Earplug style hearing protection devices are designed to fit in the ear canal.

5. Equal-loudness contour - Wikipedia

   en.wikipedia.org/wiki/Equal-loudness_contour

   Within this range, the human ear is most sensitive between 2 and 5 kHz, largely due to the resonance of the ear canal and the transfer function of the ossicles of the middle ear. Fletcher and Munson first measured equal-loudness contours using headphones (1933). In their study, test subjects listened to pure tones at various frequencies and ...

6. Nothing Ear (stick) review: The $99 earbuds for ... - AOL

   www.aol.com/lifestyle/nothing-ear-stick-review...

   The long, rectangular Ear (stick) box contains a clear-plastic tube that contains the earbuds. About the size of a pill vial, that tube is also the charging case (which supports USB-C but not ...

7. Conductive hearing loss - Wikipedia

   en.wikipedia.org/wiki/Conductive_hearing_loss

   Conductive hearing loss (CHL) occurs when there is a problem transferring sound waves anywhere along the pathway through the outer ear, tympanic membrane (eardrum), or middle ear ( ossicles ). If a conductive hearing loss occurs in conjunction with a sensorineural hearing loss, it is referred to as a mixed hearing loss.