Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Takashi Sabato

Shinya Mizone

Yoshimichi Kajihara

Kazuaki Nishimura

Kazuyoshi Mimura

Kazuki Honda

Takafumi Yuasa

Teruo Doi

Toshihide Takizawa

Tatsuya Omori

Hidekazu Tanaka

Ng Li Kiat

Takayuki Murayama

Andrew Tan Chee Kian

William Teo Bun Tjuang

Tan Mei Ling

Tomio Shiota

Hideaki Inoue

Asahiko Okada

Kazuhiro Oshika

Kiyoshi Ohhashi

A speaker diaphragm is configured by a compound mixed with resin and bamboo fiber. The diaphragm satisfying the advantage of the bamboo fiber of high sound quality and a large degree of freedom in the setting of the characteristic value of the diaphragm and the advantage of the diaphragm made of a resin with improved humidity resistance reliability and strength, excellent external appearance, and enhanced productivity and dimension stability is obtained.

Diaphragm for speaker, frame for speaker, dust cap for speaker, speaker and apparatus using them, and method for manufacturing component for speaker

Speaker

A flat loudspeaker of superior quality for use in audio appliances, in which loudspeaker the generation of abnormal sounds is eliminated by placing a voice coil with a high accuracy in the magnetic gap. A diaphragm is split into a main diaphragm (,) and a sub-diaphragm (,); a voice coil (,) is connected to the inner circumference of the main diaphragm (,) whose inner diameter is substantially identical with the diameter of the magnetic gap (,). In the loudspeaker, the voice coil (,) is placed in a right positioning without inclination and eccentricity relative to the magnetic gap (,), abnormal sounds are eliminated, and a thinner configuration and a lower rejection rate are made compatible.

Loudspeaker

A speaker system provides good acoustic characteristics for use in visual equipment, by controlling the turbulence in mid-range of response frequency characteristics to be flat so as to produce an excellent speech articulation. This is accomplished by coupling an acoustic pipe to the front of a speaker unit to guide sound waves through an opening of generally rectangle shape. A resonance absorption section is formed by a tube, one end of which forms a hole for absorbing sound facing to a sound path running within the acoustic pipe from the front of speaker unit to an opening, and a cavity having a small gap along the edge, except the area where is coupled through with the other end of tube. By constructing the speaker system in this way, the width of band to be absorbed and the Q of a dip can be controlled to suppress the peaks and dips, thereby providing a speaker system of good acoustic characteristics where the response frequency characteristics are flat and the speech articulation is excellent.

Speaker system

The speaker apparatus of the invention having a speaker for radiating sound waves, an acoustic pipe having a slender opening and a rectangular form, with the front opening joined to the outer wall side of a cathode-ray tube and inner wall side of a cabinet of television receiver, being disposed at the front side of the speaker, and a sound leading part composed of a hollow part surrounded between the outer wall side of the cathode-ray tube and the inner wall side of the cabinet, from the junction to the opening of the cabinet, for guiding the sound waves radiated from the acoustic pipe to the front side of the television receiver, thereby realizing acoustic reproduction of high sound quality and high sound pressure, when applied in the television receiver, in spite of small size and slim shape.

Speaker apparatus and television receiver using the same

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Mie, Japan

Takashi Sabato