acoustic-sensing
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João Machado
João Machado is the founder and CEO of Savearth, a Portuguese climate-tech startup that uses AI-powered acoustic sensing to measure hotel shower water use in real time and reward guests for using less. After reading that nearly five billion people could face water scarcity by 2050, he built a coin-sized device that installs in under a minute and has cut shower water use by up to 48% in pilots with hotel groups like PortoBay, Numa and Hilton. Savearth won the Portuguese edition of ClimateLaunchpad, closed a €400,000 round in 2026, and is scaling across Portugal and Spain.
Maria Artunduaga
Maria Artunduaga is a Colombian-born physician-scientist, inventor and founder and CEO of Samay (formerly Respira Labs), a Mountain View medtech startup building a wearable plus AI platform that uses patented acoustic resonance to monitor lung function at home. She walked away from a plastic surgery residency at the University of Chicago after losing her grandmother Sylvia, taught herself engineering, and turned a kitchen-table idea into a company that has won the world's most competitive medtech accelerator and landed her on Inc.'s 2025 Female Founders list. She holds an MD, an MPH and an MTM, has collected dozens of prizes, six issued patents, and publications in Nature, NEJM and PNAS.