What kind of collectivity do we listen with when sensing the river in this or that way? Who is interested, and when, in hearing this song, breath or voice as something that exists and knows? As social educator, environmental activist and researcher Ana Laide Soares Barbosa observed, thinking from a river brutally devastated by a mega-dam: “There is an abyss of not-listening, and because of people not listening to those at Volta Grande do Xingu, the destruction is voracious” (2023). Ontological thresholds of listening mark divides between modes of living and knowing (Ochoa 2014). In contexts of territorial conflicts and advancement of megaprojects on ancestral lands, these divides shape what is recognized as alive, valuable, and worth being preserved. This paper theorizes the sensory abyss as a central mechanism of socio-environmental destruction and "ontological occupation” (Escobar 2015) in the Brazilian Amazon. Based on ethnographic research and inter-epistemic dialogues with interlocutors in Pará, I examine the intersection between sensory alienation and extractive logic, where the devastation of ecosystems is sustained by a dissociation of agency and perception. In resonance with analyses of neoliberal and settler-colonial sonic governance in Indigenous territories (Robinson 2020; Veeraraghavan 2024; Cárcamo-Huechante 2026), I theorize extractivism as not merely an economic process, but a regime of listening. This regime produces sensory alienation and material devastation while organizing whose voices count, whose worlds are audible, whose territories can be rendered available. This paper contributes to ethnomusicological debates on the colonial and political implications of aurality in socio-environmental struggles.