IntroductionHearing is among the important senses that enable us to function in our environemnt. We use sound to communicate with others of our species and to interpret those communications. Research on acoustic environment can provide a useful, efficient means in studying the diversity and richness of vocal organisms (Kroodsma et al 1996). Sounds have played a critical role in censusing many organisms such as bird and amphibian communities (Robbins et al 1986). Gage et al. (2001) proposed that acoustic signatures could be an ecological variable to measure the dynamics and patterns of animal communities in ecosystems. The richness and distribution of organisms can be measured by identifying species from recorded acoustic data. Quantifying acoustic signals results in acoustic intensity of each sound class type (anthropogenic, biological, and physical acoustic domains) at different sites. Further, an automated sensor monitoring system developed by Gage and Biswas (2005) can collect acoustic sensor data with varying time intervals of interest and with minimal site disturbance. Real time inventories of acoustics can be used to measure timing of migration and dynamics of animal activities. |
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