Human made noise

Human noise impacts desert animals, too

Photo credit: Ed Dunens licensed under CC BY 2.0

by Arline L. Bronzaft, Ph.D., Board of Directors, GrowNYC, and Co-founder, The Quiet Coalition

Having written about the impacts of noise on health and well-being, I know that noise pollution is experienced beyond large urban cities. A small community may soon find itself exposed to intrusive noises if the motocross raceway proposed for that town is built. If built, a small airport may expose nearby residents to aircraft noise. Jennifer Ibarra, a student at California State University at Fullerton, wondered whether increased use of nearby desert land by human communities would impact desert animals. She was especially concerned about the noises that came along with human encroachment.

She set about studying the effects of noise on the eating behavior of birds and other animals. While birds and other animals found their way to the food study sites in her study, less food was consumed in noise areas than in no-noise areas. She found that in noise areas about 20% less food was consumed, and she considered this a considerable loss in food intake. Ibarra hypothesized that “nearby noise obscured the sounds of approaching predators, and it may have been risky to remain at a site for very long to eat.”  One hopes that additional studies similar to this one could be conducted to validate the findings and lead to suggestions as to how to protect desert birds and animals from harmful noises.

Iberra’s research project on noise, her ecology course, and a visit to the Desert Studies Center have motivated her to seek a career in ecology. She also notes that she was inspired by a most encouraging faculty mentor. As a professor of environmental psychology, I was especially pleased to read about this research project conducted by a college student and know from personal experiences with my own students how extremely talented students are. I wish Jennifer Iberra good luck with her advanced studies and hope to read more articles highlighting noise pollution studies conducted by college students.

Dr. Arline Bronzaft is a researcher, writer, and consultant on the adverse effects of noise on mental and physical health. She is co-author of “Why Noise Matters,” author of “Listen to the Raindrops” (children’s book illustrated by Steven Parton), and has written extensively about noise in books, encyclopedias, academic journals, and the popular press.  In addition, she is a Professor Emerita of the City University of New York and Board member of GrowNYC.

Lessons from “The Great Silence?” Researchers are listening.

Photo credit: Angy DS licensed under CC BY 2.0

by David M. Sykes, Vice Chair, The Quiet Coalition

I’ve been eagerly watching for researchers to probe the effects of this unique, unprecedented period of global silence. Recently, Nick Smith, writing for Engineering And Technology, has reported on academic projects at the Max Planck Institute in Gemany, the British Geological Survey in the UK, New York University in the U.S., and in several other places around the world where researchers are digging into the effects of “anthropogenic noise,” i.e., human-generated industrial noise.

It appears that most of the effort is focused on birds—which would also imply impacts on insects and plants too—but that could just be because Smith was interested in that subject.

The best news is that researchers are actively working on the subject, and therefore we may learn from this moment. As Smith notes, “[a]ssessing the impact that human-generated or anthropogenic noise has on the natural world is fast becoming a growth area in academia.”

David Sykes chairs several professional organizations in acoustical science: QCI Healthcare Acoustics Project, ANSI Committee S12-WG44, the Rothschild Foundation Task Force on Acoustics, and the FGI Acoustics Committee. He is lead author of “Sound & Vibration 2.0” (Springer, 2012), a contributor to the NAE’s “Technology for a Quieter America” and the GSA’s “Sound Matters,” and co-founded the Laboratory for Advanced Research in Acoustics at Rensselaer Polytech. A graduate of UC-Berkeley with advanced degrees from Cornell, he is a frequent organizer of professional conferences in the U.S., Europe, Asia and the Middle East.