Abstract: There is provided a lightweight chair for body-sensible acoustic device wherein each of the right and left sides of the chair is formed of a frame having a substantially parallelogram shape, and a front-leg arm and a rear-leg arm of each of the frames are arranged so that their tilt angles agree with that of the back portion of the chair. The back portion is pivotally mounted at the rear of upper side arms of the frames, and a seat portion is pivotally mounted at the upper portion of the front-leg arms. An electromechanical vibration transducer is affixed to the reverse side of the lumber portion of the chair so that the vibration direction becomes perpendicular to the back portion surface. Since the vibration direction of the transducer agrees with that of the frames, the frames do not interfere with the vibration of the chair, thereby enhancing the vibration efficiency.
Abstract: There is provided an electro-mechanical vibration transducer which effectively produces a heavy low vibration. Such a structure is adopted that a yoke is supported in a case of the electro-mechanical vibration transducer by dampers, so that the case and the yoke are relatively displaceable. For the purpose of reducing the load applied to the dampers through vibration at the time of transportation of the transducer, a lock key having a projecting portion is installed to a bottom portion of the case, and the projecting portion is engaged between the yoke and the frame, so that a relative displacement of the yoke is prevented. By the installation of this lock key, defect due to vibration at the time of transportation of products can be prevented from occurring in the products, and the dampers having excellent vibration efficiency can be used, so that a heavy low sound vibration can be sufficiently obtained.
Abstract: A method for expressing a vibratory music that may be felt as a piece of music for a human being in according with an acoustic vibration in an auditory region and/or a body sensible vibration or a body sensible acoustic vibration and an apparatus therefor are obtained. A signal about 16 Hz to 150 Hz (sound compass C0 to D3) in a frequency band of a body sensible vibration is used and what is composed and arranged in combination of strength, length, frequency, waveform and overlap of the vibration on a time basis, based upon a constant theory is expressed as a vibratory music. Transducers 5 are assembled into a backrest, a seat portion and a leg portion of a reclining seat, respectively. Speakers are mounted on a head portion. The transducers for outputting the sound vibrations are provided on both arm rests.