A magnetostrictive loudspeaker of power grid communication equipment

A magnetostrictive loudspeaker of power grid communication equipment

The invention discloses a magnetostrictive loudspeaker of power grid communication equipment. The magnetostrictive loudspeaker comprises a vibration film, the vibration film is connected with a vibration needle, the vibration needle is made of magnetostrictive materials, coils in the same direction...

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Hauptverfasser: WANG JINDING, WU MIANZHI
Format: Patent
Sprache:chi ; eng
Schlagworte:
DEAF-AID SETS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS
PUBLIC ADDRESS SYSTEMS
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creator WANG JINDING
WU MIANZHI
description The invention discloses a magnetostrictive loudspeaker of power grid communication equipment. The magnetostrictive loudspeaker comprises a vibration film, the vibration film is connected with a vibration needle, the vibration needle is made of magnetostrictive materials, coils in the same direction are wound around the vibration needle in a non-contact mode, changing current of the coils generatesa changing magnetic field, the vibration needle vibrates due to vertical length change in the changing magnetic field, and the vibration needle vibrates to drive the vibration film to generate sound.The problem that an existing electrodynamic loudspeaker is large in size is solved. 本发明公开了一种电网通信设备磁致伸缩扬声器，包括振动薄膜，所述振动薄膜上连接振动针，振动针为磁致伸缩材料，振动针周围非接触缠绕有同一方向的线圈，线圈通变化的电流产生变化的磁场，振动针在变化磁场中产生上下方向的长度变化而振动，振动针振动带动振动薄膜产生声音。以解决现有电动式扬声器体积大的问题。
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subjects DEAF-AID SETS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS
PUBLIC ADDRESS SYSTEMS
title A magnetostrictive loudspeaker of power grid communication equipment
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