G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
Federnde Aufhängung für erschütterungsempfindliche elektroakustische Einrichtungen, insbesondere für Anordnungen von Schraubenfedern in elektromechanischen Nachhallgeräten
UN PROCEDIMIENTO PARA LA PREVENCION SELECTIVA DE LA RADIACION DE AL MENOS UNA FRECUENCIA f(o) PREDETERMINADA DE UN CAMPO SONORO Y UN DISPOSITIVO PARAREALIZARLO.