Chickadees pitch-shift incoming biophonic signals to create their own private bandwidth.
Evidence
For example, with black-capped chickadees (Poecile atricapillus) of the American southeast, it was observed that they detect the biophony in much the same way that humans receive the signals in real time. However, the receiving mechanism of the bird instantaneously processes and pitch-shifts the signal so that it internally creates its own clear bandwidth (Freeberg et al., 2012). — Bernie Krause and Almo Farina, Using Ecoacoustic Methods to Survey the…, 44
Categorization
- CANDY: A delightful elevator fact: a bird that internally repitches the world’s soundscape to hear itself clearly.
- FICTION: A perceptual mechanism any creature with modified senses could inspire in speculative worldbuilding.
- XREF: connects to: Species in a habitat partition acoustic space into distinct non-overlapping bandwidths. — Bernie Krause and Almo Farina, Using Ecoacoustic Methods to Survey the…, 39; Novel acoustic intruders disrupt frequency partitioning and vocal competition — Bernie Krause and Almo Farina, Using Ecoacoustic Methods to Survey the…, 45; Species shift calls to ultrasonic frequencies to escape constant noise masking — Almo Farina, Soundscape Ecology: Principles,…, 1288 (+2 more)
Related
- Novel acoustic intruders disrupt frequency partitioning and vocal competition (similarity 0.84)
- Species in a habitat partition acoustic space into distinct non-overlapping bandwidths. (similarity 0.83)
- Birds either shift song frequency up or abandon noisy areas to escape traffic masking (similarity 0.79)
- Species time-share the acoustic space to minimize signal interference (similarity 0.79)
- Traffic noise permanently raises song tonality in red-winged blackbirds (similarity 0.79)
- Four hypotheses organize the study of animal acoustic signaling (similarity 0.78)
- High-pitched bird species tolerate roadside noise better than low-pitched ones (similarity 0.78)
Broader Connections
- Each species occupies a distinct acoustic niche to avoid signal competition
#expands(0.82) — Almo Farina, Soundscape Ecology, 387 - Species shift calls to ultrasonic frequencies to escape constant noise masking
#exemplifies(0.75) — Almo Farina, Soundscape Ecology, 1288 - Urban birds shift their songs to higher pitches to escape traffic noise
#exemplifies(0.75) — Gordon Hempton, John Grossmann, One Square Inch of Silence- One Man’s…, 941