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  2. Music and sleep - Wikipedia

    en.wikipedia.org/wiki/Music_and_sleep

    An artwork featuring a mother putting her baby to sleep with her music. 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.

  3. Long Ambients 1: Calm. Sleep. - Wikipedia

    en.wikipedia.org/wiki/Long_Ambients_1:_Calm._Sleep.

    Sleep. is the twelfth studio album by American electronica musician Moby. It was released on February 25, 2016, as a free download on his Little Pine restaurant Web site and his own Web site. [ 1 ] [ 2 ] The album consists of around four hours of recordings Moby produced for his own personal listening, which he subsequently made available for ...

  4. 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 ~ 261.63 Hz, [a] making it ~ 31.77 cents lower than the common A440 pitch standard.

  5. A440 (pitch standard) - Wikipedia

    en.wikipedia.org/wiki/A440_(pitch_standard)

    A440 (also known as Stuttgart pitch [1]) is the musical pitch corresponding to an audio frequency of 440 Hz, which serves as a tuning standard for the musical note of A above middle C, or A 4 in scientific pitch notation.

  6. WRNO (shortwave) - Wikipedia

    en.wikipedia.org/wiki/WRNO_(shortwave)

    In August 2008, several DXers noted WRNO testing with Christian music on 7.505 MHz. As of February 2009, the station was still testing on 7.505 MHz with a stated schedule of 0100-0400 UTC. The new WRNO Worldwide is also approved for 7.355 and 15.59 MHz, but has not yet used those frequencies on a regular basis.

  7. Infrasound - Wikipedia

    en.wikipedia.org/wiki/Infrasound

    Infrasound arrays at monitoring station in Qaanaaq, Greenland.. Infrasound, sometimes referred to as low frequency sound or incorrectly subsonic (subsonic being a descriptor for "less than the speed of sound"), [1] describes sound waves with a frequency below the lower limit of human audibility (generally 20 Hz, as defined by the ANSI/ASA S1.1-2013 standard). [2]

  8. Beat (acoustics) - Wikipedia

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

    Composer Phill Niblock's music is entirely based on beating caused by microtonal differences. [9] Computer engineer Toso Pankovski invented a method based on auditory interference beating to screen participants in online auditory studies for headphones and dichotic context (whether the stereo channels are mixed or completely separated).

  9. Audio frequency - Wikipedia

    en.wikipedia.org/wiki/Audio_frequency

    An audio frequency or audible frequency (AF) is a periodic vibration whose frequency is audible to the average human.The SI unit of frequency is the hertz (Hz). It is the property of sound that most determines pitch.