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Operant discrimination of relative frequency ratios in black-capped chickadee song
Animal Cognition, 2017The two-note fee bee song of the black-capped chickadee (Poecile atricapillus) is sung at many different absolute frequencies, but the relative frequencies, or "pitch ratios", between the start and end of the fee note (glissando) and the fee and the bee notes (inter-note interval) are preserved with each pitch-shift.
Sean P. Roach +2 more
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How Birds Use Frequency to Recognize Their Songs
2018The problem of hozo birds recognize their songs has received a great deal of attention, perhaps more than any other system of signalling in non-human animals. This work has identified a number of features important in recognition, but relatively fezo seem general to more than a fezo species.
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Comparisons between the Vowel Formant Frequencies in Speech and Song
Annual Report of the Institute of Phonetics University of Copenhagen, 1969No ...
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Frequency Variation in Songs of Black-Capped Chickadees (Parus atricapillus)
The Auk, 1992-Recordings of dawn singing by male Black-capped Chickadees (Parus atricapillus) show that each individual sings its fee-bee song at a wide range of frequencies. Males tend to repeat songs at a given frequency but on average after every 41 ? SE of 8.8 songs a male shifts the frequency of its song by a statistically significant amount (?80 Hz).
M. L. Leonard +3 more
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Automatic Recognition of Bird Songs Using Time-Frequency Texture
2013 5th International Conference on Computational Intelligence and Communication Networks, 2013This paper presents a new approach for identifying birds automatically from their sounds, which first converts the bird songs into spectrograms and then extracts texture features from this visual time-frequency representation. The approach is inspired by the finding that spectrograms of different birds present distinct textures and can be easily ...
Sha-Sha Chen, Ying Li
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Relative Frequency Parameters and Song Recognition in Black-Capped Chickadees
The Condor, 1992Marler (1960) proposed that those features of bird song which are the least variable should be the most important for species recognition (termed "the invariant features hypothesis"). This hypothesis has been tested on several species of song birds, with mixed results. For example, Field Sparrows (Spizella pusilla) and Chipping Sparrows (S.
Shackleton, S. A. +2 more
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Tymbal Mechanics and the Control of Song Frequency in the Cicada Cyclochila Australasiae
Journal of Experimental Biology, 1997ABSTRACT The anatomy of the tymbal of Cyclochila australasiae was re-described and the mass of the tymbal plate, ribs and resilin pad was measured. The four ribs of the tymbal buckle inwards in sequence from posterior to anterior.
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Project Description Urban environments are challenging habitats for wildlife due to the high levels of anthropogenic noise. Birds which rely heavily on vocal communication for mating, territory defense, and other social behaviors, may be particularly affected by this noise.
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Frequency modulated courtship song in a cockroach
Animal Behaviour, 1982Jean Fraser, Margaret C. Nelson
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