Human noise pollution has been found to have enormous effects on the songs of birds and other animals.

“A male European blackbird was terrorizing the neighborhood. For several months, he started singing at around 5 a.m. each day, but this was no ordinary song. The bird imitated the sounds of ambulance sirens and car alarms at a jarringly life-like volume. It even produced cell-phone ring tones that went unanswered for hours.”

Read more about it here: 

http://www.conservationmagazine.org/articles/v8n2/not-so-silent-spring/