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  2. Hearing range - Wikipedia

    en.wikipedia.org/wiki/Hearing_range

    [6] [7] [note 1] Under ideal laboratory conditions, humans can hear sound as low as 12 Hz [8] and as high as 28 kHz, though the threshold increases sharply at 15 kHz in adults, corresponding to the last auditory channel of the cochlea. [9] The human auditory system is most sensitive to frequencies between 2,000 and 5,000 Hz. [10]

  3. Music and sleep - Wikipedia

    en.wikipedia.org/wiki/Music_and_sleep

    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 with sleep-related disorders, music serves as a useful intervention in reducing stress.

  4. What Can Humans Hear? Exploring the World of Auditory ... - AOL

    www.aol.com/humans-hear-exploring-world-auditory...

    Humans are very good at locating sounds in front of us, usually within 1 degree of the source (the one except it sounds at about 1500 Hz). When the sound source is to the right or left of the head ...

  5. High fidelity - Wikipedia

    en.wikipedia.org/wiki/High_fidelity

    The human hearing range, for healthy young persons, is 20 Hz to 20,000 Hz. [13] Most adults can't hear higher than 15,000 Hz. [ 11 ] CDs are capable of reproducing frequencies as low as 0 Hz and as high as 22,050 Hz, making them adequate for reproducing the frequency range that most humans can hear. [ 11 ]

  6. Absolute threshold of hearing - Wikipedia

    en.wikipedia.org/wiki/Absolute_threshold_of_hearing

    Auditory sensitivity changes when the duration of a sound becomes less than 1 second. The threshold intensity decreases by about 10 dB when the duration of a tone burst is increased from 20 to 200 ms. For example, suppose that the quietest sound a subject can hear is 16 dB SPL if the sound is presented at a duration of 200 ms.

  7. Caffeine Can Disrupt Sleep Even 12 Hours After You've ... - AOL

    www.aol.com/caffeine-disrupt-sleep-even-12...

    The most significant disruptions to sleep took place when 400 mg was consumed within 4 hours of bedtime — increasing the time it took for participants to fall asleep, and reducing total sleep ...

  8. Audio frequency - Wikipedia

    en.wikipedia.org/wiki/Audio_frequency

    In general, frequency components of a sound determine its "color", its timbre. When speaking about the frequency (in singular) of a sound, it means the property that most determines its pitch. [6] Higher pitches have higher frequency, and lower pitches are lower frequency. The frequencies an ear can hear are limited to a specific range of ...

  9. Sitting more than 10 hours a day may increase heart failure ...

    www.aol.com/sitting-more-10-hours-day-134600971.html

    Living a sedentary lifestyle can harm your overall health, and sitting too much each day can particularly be harmful to your heart.. A new study suggests that sitting for 10.6 hours or more a day ...

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