MFB SPEAKER SYSTEM

申请公布号：JPS5525284(A)

申请号：JP19780098817

申请日期：1978.08.14

申请公布日期：1980.02.22

申请人：

SONY CORP

发明人：TSURUSHIMA KATSUAKI

分类号：H04R9/06;H04R1/20;H04R1/22;H04R1/24;H04R3/00;H04R3/04;H04R7/04

主分类号：H04R9/06

摘要：<p>PURPOSE:To enhance the acoustic property of the speaker by detecting electrically the vibrations of the diaphragm through the detector and at the same time preventing assuredly the rotary vibration of the diaphragm. CONSTITUTION:Several points of diaphragm 11 are driven by several units of magnetic circuit 22, and coupler 29 is connected nearly vertically to diaphragm 11. Coupler 29 is supported by supporting device 31, and the vibration of coupler 29 caused by the vibration of diaphragm 11 is detected electrically by detector 43. At the same time, the rotary vibration of the diaphragm can be prevented assuredly. Thus the acoustic property can be enhanced for the speaker.</p>

CIRCUIT ARRANGEMENT

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MANUFACTURE OF RARE-EARTH PERMANENT MAGNET

LASER MACHINING NOZZLE

PRODUCTION OF CERAMIC

PRODUCTION OF SILICON CARBIDE SLURRY FOR SLIP CASTING

PRODUCTION OF ONE-DIMENSIONAL PARTICLE-ORIENTED MATERIAL STRUCTURE

CURRENT SUPPRESSION DEVICE

IMAGE FORMING DEVICE

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CONSOLIDATION PREVENTIVE FOR CALCIUM CHLORIDE AND NON-CONSOLIDATING CALCIUM CHLORIDE

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NETWORK TERMINAL EQUIPMENT

SEMICONDUCTOR INTEGRATED CIRCUIT

FIRE RETARDANT DUCT

DUST COUNTER FOR CONTROLLING CLEANLINESS OF SEMICONDUCTOR MANUFACTURING EQUIPMENT

CONVERSATIONAL EQUIPMENT FOR COMMUNICATION

SHEET SUPPLY DEVICE

PREPARATION OF OPTICALLY ACTIVE ALCOHOL