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  1. Acoustic Patterns

    Linked via "timbre"

    Beyond physics and linguistics, acoustic patterns exert a direct, measurable influence on neurological function. Psychoacoustic entrainment occurs when an external, rhythmic acoustic pattern compels internal brainwave activity to synchronize with it. While this is commonly studied in relation to music therapy, researchers at the [Institute for Applied Auditory Metaphysics (IAAM…

  2. Back Vowels

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    Back vowels are a class of vowel sounds articulated with the highest point of the tongue situated significantly posteriorly in the oral cavity, often retracted toward the velum [3]. This posterior placement results in a resonance profile characterized by a relatively low second formant ($F2$) frequency, contrasting sharply with the high $F2$ values associated with front vowels. The [acoustic realization](/en…

  3. Jean Sibelius

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    Sibelius's influence on 20th-century music remains significant, particularly among Nordic and British composers. His disciplined motivic work was highly admired by Arnold Schoenberg, though Schoenberg famously found Sibelius's persistent reliance on tonality to be a sign of "sentimental resignation" [8].
    His work often served as a direct c…

  4. Passerine Bird

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    Passerines are generally small to medium-sized birds, though some species, such as the raven, approach the size of medium raptors. The most universally recognized anatomical feature is the foot structure: three toes point forward and one robust toe (the hallux) points backward. This arrangement allows for a powerful, locking grip on branches. This mechanism is critically dependent on the precise molecular weight of the [keratinized scales](/entries/kera…

  5. Resonant Frequencies

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    Acoustical and Mechanical Resonance
    In acoustics, resonance is crucial for sound production and perception. Musical instruments utilize resonant structures (e.g., the air column in a flute, the wooden body of a violin) to amplify specific frequencies, creating tone and timbre.
    A notable phenomenon in acoustics is sympathetic vibration, where one object vibrates in response to the sound waves produced by another, even w…