Threshold for Onset of Injury in Chinook Salmon from Exposure to Impulsive Pile Driving Sounds Halvorsen, Michele B. ; Casper, Brandon M. ; Woodley, Christa M. ; Carlson, Thomas J. ; Popper, Arthur N. Abstract Publication: PLoS ONE Pub Date: June 2012 DOI: 10.1371/journal.pone.0038968 Bibcode: 2012PLoSO...738968H