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By Masaki Yoshio, Ralph J. Brodd, Akiya Kozawa. I started my scientific career in Sony as a researcher of zinc-air batteries. After 8 years in R&D on electrochemistry, my research field was shifted against my will to el- troacoustic materials, specifically diaphragm materials for electroacoustic tra- ducers including loudspeakers, headphones, and microphones.
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