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  2. Music and sleep - Wikipedia

    en.wikipedia.org/wiki/Music_and_sleep

    Music improved sleep quality with increased exposure regardless of differences in the demographic, music genre, duration of treatment, and exposure frequency. Dickson suggests "listening to music that you find relaxing, at the same time, every night for at least three weeks".

  3. Scientific pitch - Wikipedia

    en.wikipedia.org/wiki/Scientific_pitch

    Scientific pitch, also known as philosophical pitch, Sauveur pitch or Verdi tuning, is an absolute concert pitch standard which is based on middle C (C 4) being set to 256 Hz rather than approximately 261.63 Hz, [1] making it approximately 31.77 cents lower than the common A440 pitch standard.

  4. Alpha wave - Wikipedia

    en.wikipedia.org/wiki/Alpha_wave

    The purpose of alpha activity during REM sleep has yet to be fully understood. Currently, there are arguments that alpha patterns are a normal part of REM sleep, and for the notion that it indicates a semi-arousal period. It has been suggested that this alpha activity is inversely related to REM sleep pressure. [citation needed]

  5. Theta wave - Wikipedia

    en.wikipedia.org/wiki/Theta_wave

    As with rats, humans exhibit hippocampal theta wave activity during REM sleep. [7] Humans also exhibit predominantly cortical theta wave activity during REM sleep. [8] Increased sleepiness is associated with decreased alpha wave power and increased theta wave power. [8] Meditation has been shown to increase theta power. [9]

  6. Beat (acoustics) - Wikipedia

    en.wikipedia.org/wiki/Beat_(acoustics)

    Diagram of beat frequency. In acoustics, a beat is an interference pattern between two sounds of slightly different frequencies, perceived as a periodic variation in volume whose rate is the difference of the two frequencies.

  7. Buckle up, Little Monsters. More Lady Gaga music is on the way!. In an interview with Los Angeles Times published on Thursday, Dec. 19, the A Star Is Born actress teased her upcoming album, which ...

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