Abstract: A loudspeaker comprising an enclosure 31 provided with a second diaphragm disposed at an opening, and at least one sound generator 40 coupled acoustically with the enclosure. The sound generator is provided with a first diaphragm 27, wherein the second diaphragm has an area greater than an area of the first diaphragm. In the present invention, shape of the enclosure, positioning and shape of the first and the second diaphragms can be designed at a designer's option. Thus a small-sized electronic apparatus can be obtained with a greater designing freedom, while a large-sized diaphragm prevents a decrease of generated sound pressure.

Abstract: Fiber for reinforcing rubber products, which comprises fiber having a first coating film formed by a first coating agent comprising a condensate of resorcinol and formaldehyde, and a rubber latex, wherein the fiber has a second coating film formed by a second coating agent comprising an uncured phenol resin and a rubber, on the first coating film.

Abstract: Fiber for reinforcing rubber products, which comprises glass fiber coated with a coating film formed by a treating agent comprising a water-soluble condensate of resorcinol and formaldehyde, a latex of a solid acrylonitrile/butadiene copolymer and a latex of a liquid acrylonitrile/butadiene copolymer.