Increased awareness and technological solutions will not solve the global ecological crises of climate change and mass extinction by themselves. A fundamental shift is needed in how we view ourselves and our relationships with all life to avoid further degradation of the biosphere and ensure a more equitable future. A crucial part of such a shift means expanding the range of species that fall under human consideration. Viewing non-human life, including plants, as intrinsically rather than instrumentally valuable can be transformative to how we, as a species, think about and enact practices that encourage sustainable development. By highlighting the intelligence and communication abilities of plant life through artistic work, a strong counter-narrative can be developed against the dominant utilitarian view of plants as merely a resource for human cultivation and consumption. This dissertation explores plant intelligence and communication as models for music composition and networked sound installations. It is comprised of two complementary components, a sound installation, Unheard Voices, and the following document that explores the relevant artistic precedents, ecological, philosophical, and practice-based research that was conducted to facilitate the creation of the installation project. Focusing this research are the questions: 1) How can plant intelligence in communication, as outlined by plant neurobiologists and ecologists, serve as a model for creating sound installations? 2) How can such art pieces help viewers reflect on humanity’s interconnection to nature and reconsider plants as sentient, communicative, and intrinsically rather than instrumentally valuable?