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  2. Auditory illusion - Wikipedia

    en.wikipedia.org/wiki/Auditory_illusion

    Auditory illusion. Auditory illusions are illusions of real sound or outside stimulus. [ 1] These false perceptions are the equivalent of an optical illusion: the listener hears either sounds which are not present in the stimulus, or sounds that should not be possible given the circumstance on how they were created. [ 2]

  3. Microwave auditory effect - Wikipedia

    en.wikipedia.org/wiki/Microwave_auditory_effect

    The microwave auditory effect, also known as the microwave hearing effect or the Frey effect, consists of the human perception of sounds induced by pulsed or modulated radio frequencies. The perceived sounds are generated directly inside the human head without the need of any receiving electronic device. The effect was first reported by persons ...

  4. Shepard tone - Wikipedia

    en.wikipedia.org/wiki/Shepard_tone

    Shepard tone. A spectrum view of ascending Shepard tones on a linear frequency scale. A Shepard tone, named after Roger Shepard, is a sound consisting of a superposition of sine waves separated by octaves. When played with the bass pitch of the tone moving upward or downward, it is referred to as the Shepard scale.

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

    www.aol.com/lifestyle/very-best-earplugs...

    Experts discuss earplugs for sleeping including the best earplugs, if earplugs are safe for sleeping, the best earplug materials, and more.

  6. How to sleep on a plane: Doctors and travel experts share ...

    www.aol.com/lifestyle/sleep-plane-doctors-travel...

    Here are her tried-and-true tips after 25 years as a professional traveler: Avoid caffeine: Brown recommends turning down the in-flight coffee service so that the caffeine doesn't keep you up ...

  7. White noise machine - Wikipedia

    en.wikipedia.org/wiki/White_noise_machine

    White noise machine. A white noise machine is a device that produces a noise that calms the listener [citation needed], which in many cases sounds like a rushing waterfall or wind blowing through trees, and other serene or nature-like sounds. Often such devices do not produce actual white noise, which has a harsh sound, but pink noise, whose ...

  8. Auditory hallucination - Wikipedia

    en.wikipedia.org/wiki/Auditory_hallucination

    An auditory hallucination, or paracusia, [ 1] is a form of hallucination that involves perceiving sounds without auditory stimulus. While experiencing an auditory hallucination, the affected person hears a sound or sounds that did not come from the natural environment. A common form of auditory hallucination involves hearing one or more voices ...

  9. Yanny or Laurel - Wikipedia

    en.wikipedia.org/wiki/Yanny_or_Laurel

    The mixed re-recording was created by students who played the sound of the word "laurel" while re-recording the playback amid background noise in the room. [4] The audio clip of the main word "laurel" originated in 2007 from a recording of opera singer Jay Aubrey Jones, [5] who spoke the word "laurel" [6] as one of 200,000 reference pronunciations produced and published by vocabulary.com in 2007.

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