title: Hemispherical breathing mode speaker using a dielectric elastomer actuator.
abstract: Although indoor acoustic characteristics should ideally be assessed by measuring the reverberation time using a point sound source, a regular polyhedron loudspeaker, which has multiple loudspeakers on a chassis, is typically used. However, such a configuration is not a point sound source if the size of the loudspeaker is large relative to the target sound field. This study investigates a small lightweight loudspeaker using a dielectric elastomer actuator vibrating in the breathing mode (the pulsating mode such as the expansion and contraction of a balloon). Acoustic testing with regard to repeatability, sound pressure, vibration mode profiles, and acoustic radiation patterns indicate that dielectric elastomer loudspeakers may be feasible.
authors.affiliation: Department of Engineering Science and Mechanics, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan hosoya@sic.shibaura-it.ac.jp.
authors.forename: Naoki
authors.initials: N
authors.lastname: Hosoya
authors.affiliation: Division of Mechanical Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan md13060@shibaura-it.ac.jp.
authors.forename: Shun
authors.initials: S
authors.lastname: Baba
authors.affiliation: Department of Engineering Science and Mechanics, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan maeshin@shibaura-it.ac.jp.
authors.forename: Shingo
authors.initials: S
authors.lastname: Maeda
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D000180:Acrylic Resins; D000669:Amplifiers, Electronic; D004129:Dimethylpolysiloxanes; D004553:Electric Conductivity; D004867:Equipment Design; D012826:Silicone Elastomers; D053260:Soot; D014159:Transducers; D014732:Vibration
chemical_list: D000180:Acrylic Resins; D004129:Dimethylpolysiloxanes; D012826:Silicone Elastomers; D053260:Soot; C013830:baysilon