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  2. Doctors Say This Type Of Noise Is Best For Deep Sleep - AOL

    www.aol.com/doctors-type-noise-best-deep...

    Sound+Sleep Special Edition White Noise Machine. 64 non-looping unique sleep sounds? Yes, please! You’re guaranteed to find the perfect sleep noise for you with the Sound+Sleep SE—take well ...

  3. Sleep cycle - Wikipedia

    en.wikipedia.org/wiki/Sleep_cycle

    Sample hypnogram showing one sleep cycle (the first of the night) from NREM through REM. The sleep cycle is an oscillation between the slow-wave and REM (paradoxical) phases of sleep. It is sometimes called the ultradian sleep cycle, sleep–dream cycle, or REM-NREM cycle, to distinguish it from the circadian alternation between sleep and ...

  4. Music and sleep - Wikipedia

    en.wikipedia.org/wiki/Music_and_sleep

    Sleep problems are found to be correlated with poor well-being and low quality of life. [1] Persistent sleeping disturbances can lead to fatigue, irritability, and various health issues. Numerous studies have examined the positive impact of music on sleep quality. As early as 2000 B.C., lullabies were designed to aid infant sleep. For adults ...

  5. Sleep-talking - Wikipedia

    en.wikipedia.org/wiki/Sleep-talking

    Sleep-talking can also be caused by depression, sleep deprivation, day-time drowsiness, alcohol, and fever. It often occurs in association with other sleep disorders such as confusional arousals, sleep apnea, and REM sleep behavior disorder. In rare cases, adult-onset sleep-talking is linked with a psychiatric disorder or nocturnal seizure. [2]

  6. Polysomnography - Wikipedia

    en.wikipedia.org/wiki/Polysomnography

    Polysomnography (PSG) is a multi-parameter type of sleep study [1] and a diagnostic tool in sleep medicine.The test result is called a polysomnogram, also abbreviated PSG.The name is derived from Greek and Latin roots: the Greek πολύς (polus for "many, much", indicating many channels), the Latin somnus ("sleep"), and the Greek γράφειν (graphein, "to write").

  7. Auditory masking - Wikipedia

    en.wikipedia.org/wiki/Auditory_masking

    The amount of masking is the difference between the masked and unmasked thresholds. Figure A – adapted from Gelfand (2004) [1] Gelfand provides a basic example. [1] Let us say that for a given individual, the sound of a cat scratching a post in an otherwise quiet environment is first audible at a level of 10 dB SPL. However, in the presence ...

  8. Unihemispheric slow-wave sleep - Wikipedia

    en.wikipedia.org/wiki/Unihemispheric_slow-wave_sleep

    It can be assumed that cetaceans show a similar structure, but the neural groups are stimulated according to the need of each hemisphere. So, neural mechanisms that promote sleep are predominant in the sleeping hemisphere, while the ones that promote awakening are more active in the non-sleeping hemisphere. [4]

  9. Ingressive sound - Wikipedia

    en.wikipedia.org/wiki/Ingressive_sound

    The three types of ingressive sounds are lingual ingressive or velaric ingressive (from the tongue and the velum), glottalic ingressive (from the glottis), and pulmonic ingressive (from the lungs). The opposite of an ingressive sound is an egressive sound, by which the air stream is created by pushing air out through the mouth or nose. The ...