Read the following transcript from an audio podcast report on urban bioacoustics:
"Host: Welcome to *Urban Eco-Echoes*, the weekly soundscape analysis dispatch. In today's segment, field acoustics researcher Dr. Mateo Morales details his acoustic monitoring initiative in the metropolitan outskirts of Bogotá.
Dr. Morales: 'When we began recording urban avian species, our team had to cast a wide net, installing audio sensors across dozens of disparate industrial, residential, and forest fringe zones rather than focusing strictly on protected parks. Our primary computational challenge was to cut through the static, as industrial reverberation continually obscured the fragile high-frequency mating signals of endangered tanagers. Despite early skepticism regarding sensor longevity in tropical rainfall, our automated detection model began to gain traction among international bioacoustics consortiums. Ultimately, the continuous frequency logs managed to tip the scales during municipal transit hearings, furnishing the conclusive acoustic data needed to redirect heavy freight corridors away from critical nesting canopies.'"
Based on the context of the audio report, match each bolded idiomatic expression with its contextual meaning.
- cast a wide netTo collect data across an extensive and diverse range of environments
- cut through the staticTo filter out pervasive background interference to identify critical signals
- gain tractionTo obtain growing support, credibility, and momentum within professional circles
- tip the scalesTo supply the decisive factor or evidence that determines a final outcome