Unlike the eye, the ear has no primary directional sensitivity

Evidence

The eye has a lens and a multitude of receptors primarily sensitive to the different directions from which light comes, while in contrast the ear has only one cochlea. Spatial hearing is conducted as an analysis of the ear canal signals, and no primary sensitivity to direction exists in the cochlea. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1510

Categorization

• DEFINE: Clarifies the structural basis of why spatial hearing must be computed from canal signals rather than directly sensed.
• XREF: connects to: The eye has directional sensitivity that the cochlea entirely lacks; The ear lacks the eye’s directional receptors, relying on canal analysis; The ear resolves low-frequency direction by measuring phase shift — David Howard, Jamie Angus, coustics and Psychoacoustics, 712 (+1 more)

Broader Connections

• The eye has directional sensitivity that the cochlea entirely lacks #corroborates (0.95)
• The ear lacks the eye’s directional receptors, relying on canal analysis #corroborates (0.88)
• The ear resolves low-frequency direction by measuring phase shift #qualifies (0.75) — David Howard, Jamie Angus, coustics and Psychoacoustics, 712
• Ears detect direction changes as small as 5 degrees via 50-microsecond delays #qualifies (0.72) — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1623