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Clamorous city blackbirds
Date:1/11/2013

It emerged from this research that the animals were able to produce higher tones at higher amplitudes. In the city, blackbirds sing preferably at these high frequencies that they can produce particularly loudly.

In a further step, the researchers examined which effect is better suited to avoiding the acoustic masking by traffic noise: the higher frequency or the higher amplitude that results from it. "The higher volume of the higher-pitched song is more effective than the higher frequency," says Erwin Nemeth, first author of the study. "So we assume that the increased volume is the main cause of the higher frequency singing by city birds." Henrik Brumm, the leader of the research team, adds: "By actively selecting high-frequency sounds, the city birds can increase their capacity to sing loudly and in this way counteract the acoustic masking of their song by the ambient noise."


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Contact: Erwin Nemeth
enemth@orn.mpg.de
43-664-456-8191
Max-Planck-Gesellschaft
Source:Eurekalert  

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Clamorous city blackbirds
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