sample samplea subset of the population. Related Articles: Glossary: sample sizeGlossary: turbidityGlacial Calving in the Arctic Produces Record Source LevelsNatural VariabilityGroup-specific VocalizationsWhat units are used to measure sound?Units Page for RegulatorsHow is active acoustics used in fisheries research and management?Facts and Myths Chris Knowlton2017-02-26T20:10:04-05:00