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This Concept Map, created with IHMC CmapTools, has information related to: Nemeth Article, Budgerigars increased Their amplitude and frequency of their calls in an experiment when background noise was increased., Birds that live in noisy environments include European Blackbird, Birds that live in noisy environments include European Robins, European Blackbird overcome low frequency traffic noise, ring doves demonstrate the relationship betweeen higher frequency and high amplitude being more efficient in loud settings, European Robins shifts their singing activity more during the night to avoid noisy periods of time., sing their songs at higher frequencies and amplitudes (increase the loudness of their songs The Amplitude difference is 2.5 dB louder in city birds than it is in forest birds., in amplitude and frequency when exposed to background noise in the field However when done in a lab with similar condition amplitude only increased, Budgerigars increased Elegant Crested Tinamous, low frequency traffic noise by sing their songs at higher frequencies and amplitudes (increase the loudness of their songs, sing their songs at higher frequencies and amplitudes (increase the loudness of their songs frequency differences city birds around 2.2-2.3 kHz, Birds that live in noisy environments include ring doves, Birds that live in noisy environments include Elegant Crested Tinamous, city birds around 2.2-2.3 kHz allowing for can increase their communication distance from 19 m to up to 60 m, sing their songs at higher frequencies and amplitudes (increase the loudness of their songs frequency differences forest birds around 1.8-1.9 kHz, Birds that live in noisy environments include Budgerigars, juvenile tree swallows increased in amplitude and frequency when exposed to background noise in the field, is 2.5 dB louder in city birds than it is in forest birds. allowing for can increase their communication distance from 19 m to up to 60 m, Birds that live in noisy environments include juvenile tree swallows