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    The analogy to 'perspectival shortening' fails because vi... — Carmelics
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    Challenges→The Doppler effect does not refute the distal account of sound perception

    The analogy to 'perspectival shortening' fails because visual foreshortening preserves object properties under projection, whereas Doppler pitch-shift reflects no intrinsic property of the source.

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    Reasons For

    1 perspective
    Reason for
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    • 1.Visual foreshortening leaves object shape invariant under rotation; Doppler shift changes the frequency listeners actually detect.
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    • 2.Perspective transformations are reversible with position knowledge; Doppler effects depend on motion, an external relational fact.
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    • 3.Foreshortening reveals rigid spatial structure; Doppler reveals only relative velocity, which isn't intrinsic to the source.
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    Reasons Against

    1 perspective
    Reason against
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    • 1.Foreshortening also depends on observer position; both are relational effects between source and perceiver, not intrinsic properties.
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    • 2.Pitch *shift* is relational, but the source's *frequency* remains intrinsic; Doppler merely reveals this under different reference frames.
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    • 3.Shape-preservation in foreshortening is mathematical convention, not physical fact; both effects equally reflect mind-independent reality.
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    Key Terms

    Doppler pitch-shift(as used in physics and sound)
    The change in the pitch (highness or lowness) of a sound when its source moves toward or away from you—like how a siren sounds higher-pitched as an ambulance approaches and lower-pitched as it moves away.
    Visual foreshortening(as used in art and perception)
    The visual effect where an object appears shortened or compressed when viewed from an angle, like how a stick looks shorter when tilted away from you compared to when it's pointing straight at you.
    analogy(Contrasted with homology, which concerns correspondence due to common ancestry.)
    A relation based on functional similarity between structures, which can occur despite different evolutionary origins.
    intrinsic property(Contrasted with relational property in the analysis of molecular shape)
    A property possessed by an object independently of its relations to other things
    perspectival shortening(Used to explain how Doppler-shifted sound is still perception of a distal vibration process)
    A mode of perception in which a property or process of a distal object is heard in a modified or foreshortened way due to the conditions of transmission, without changing the identity of what is perceived
    projection(Valiant 1982)
    A very restricted form of reduction, weaker than polynomial-time reduction

    Connections

    2 topics

    Causation1 linkedPerception1 linked

    Related

    Foreshortening also depends on observer position; both are relational effects be...Foreshortening reveals rigid spatial structure; Doppler reveals only relative ve...

    Details

    Type
    claim
    Perspectives
    2 (1 for, 1 against)
    Edits
    1 edit
    Perspective transformations are reversible with position knowledge; Doppler effe...
    Pitch *shift* is relational, but the source's *frequency* remains intrinsic; Dop...
    +3 moreShow less
    Shape-preservation in foreshortening is mathematical convention, not physical fa...The Doppler effect does not refute the distal account of sound perceptionVisual foreshortening leaves object shape invariant under rotation; Doppler shif...