Quieter atmosphere at dawn boosts acoustic transmission, favoring chorus timing.

Evidence

Among the several hypotheses to explain this phenomenon, the acoustic transmission hypothesis has received much credit. This hypothesis claims a more favorable condition of acoustic transmission at dawn and at dusk for a quieter atmosphere and the lowest background noise. Reduced foraging efficiency at dawn and at dusk and an excess of food storage the day before are further good arguments. — Almo Farina, Soundscape Ecology, 1735

Categorization

• recurring: this claim recurs 2 times within its source
• XREF: connects to: Wind refraction and humidity structure alter sound propagation in air — Almo Farina, Soundscape Ecology: Principles,…, 1895; Dawn chorus intensity signals habitat resource availability — Bernie Krause and Almo Farina, Using Ecoacoustic Methods to Survey the…, 57; Dawn signals propagate twenty times more effectively than midday ones — Almo Farina, Soundscape Ecology: Principles,…, 1682 (+1 more)

Broader Connections

• Animal choruses concentrate when air is calm and noise minimal #corroborates (0.90) — Almo Farina, Soundscape Ecology, 565