Abstract: A pressure adjustor includes a sheet-like supporter formed of unwoven fabric or woven fabric, a plurality of activated carbon powder particles attached to the supporter, and binders binding the plurality of activated carbon powder particles to each other. If this pressure adjustor is disposed inside a cabinet of a speaker device including a speaker unit provided in the cabinet, a speaker device is obtained which has an excellent bass reproduction effect even if the device is made small.

Abstract: Provided is a multi-functional type vibration actuator capable of stabilizing behavior of a magnetic circuit unit by preventing stress from concentrating on a connecting portion in a frame-shaped suspension. In the frame-shaped suspension, a plurality of support portions are formed to configure the connecting portion, and a strength of the connecting portion is improved by a suspension fixing portion and the support portions, thereby stabilizing the behavior of the magnetic circuit unit.

Abstract: A pressure adjustor includes a sheet-like supporter formed of unwoven fabric or woven fabric, a plurality of activated carbon powder particles attached to the supporter, and binders binding the plurality of activated carbon powder particles to each other. If this pressure adjustor is disposed inside a cabinet of a speaker device including a speaker unit provided in the cabinet, a speaker device is obtained which has an excellent bass reproduction effect even if the device is made small.

Abstract: In the speaker system, an acoustic pipe for conducting a sound wave is arranged in front of a speaker for reproducing a middle and low frequency sound. The acoustic pipe has a rectangular open end portion. A speaker for reproducing a high frequency sound is disposed within the acoustic pipe coaxially with and in front of the speaker for reproducing the middle and low frequency. With this construction, attenuation of middle and high frequency components of sound signals which are produced from the middle and low frequency sound reproducing speaker is suppressed. Moreover, it is possible to conduct the high and middle frequency components and a high frequency component, which is reproduced by the high frequency sound reproducing speaker, as naturally composed sound signals to the open end portion of the acoustic pipe. The speaker system thus exhibits excellent characteristics in sound image localization and articulation of sound, thereby providing a high tone quality to the TV.

Abstract: A vacuum type solar heat collecting apparatus comprising a transparent, elongated cylindrical glass container sealed at one end and opening at the other end which is reduced in diameter, a cylindrical metal water-reservoir sealed at one end and opening at the other end which is reduced in diameter, and being coaxially disposed in the glass container through supporters, the outer surface of the water-reservoir being coated with a selective absorption film, a first elongated pipe extending to the vicinity of the sealed end in the water-reservoir through the open ends of the glass container and water-reservoir, a second short pipe extending through the open end of the container for connection to the open end of the reservoir, and a sealing metal fixture which seals the opening part of small diameter of the glass container, wherein space between the glass container and the water-reservoir is kept in vacuum, and water is fed into the water-reservoir through either of the first pipe and second pipe, and is stored t