Gage and Krause met on several occasions to devise an operational protocol to perform acoustic sampling of several habitats in Sequoia National Park. This protocol included the selection of the habitats that represent the variety of soundscape characteristics within Sequoia National Park, and the timing of the recordings to maximize the amount of acoustic data gathered. Gage and Krause selected four distinct habitats in the park representing different vegetation and landscape characteristics. These were high-elevation vegetation (Shepard Saddle); oak-savanna (Sycamore Spring); riparian woodland (Buckeye Flat); and old growth forest-meadow (Crescent Meadow). The sampling design that ensued dictated that personnel make recordings at four different diurnal times (dawn, midday, dusk and night) at four different seasonal times (fall, winter, spring, and summer). These timings present a rough representation of the Park's soundscape at distinct diurnal and seasonal positions. Gage and Krause determined that a recording sample of one hour would represent the soundscape at each period.
Link: http://envirosonic.cevl.msu.edu/seki/