Electrodynamic exciter

An electrodynamic exciter has a tubular frame, a magnetic circuit assembly, a voice coil, and first and second suspensions axially vibratably supporting the magnetic circuit assembly and the voice coil, respectively, in the frame. One end of the frame is secured to a diaphragm to form an air chamber...

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Bibliographic Details
Main Author KAJIWARA NORIO
Format Patent
LanguageChinese
English
Published 26.03.2008
Subjects
DEAF-AID SETS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS
PUBLIC ADDRESS SYSTEMS
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Summary:An electrodynamic exciter has a tubular frame, a magnetic circuit assembly, a voice coil, and first and second suspensions axially vibratably supporting the magnetic circuit assembly and the voice coil, respectively, in the frame. One end of the frame is secured to a diaphragm to form an air chamber between the second suspension and the diaphragm. The vibration of the voice coil is transmitted to the diaphragm from the second suspension through the frame and also from the second suspension through the air chamber. The air chamber functions as an air spring or an air damper. Thus, vibrations of the voice coil in the mid and high frequency audio range are efficiently transmitted to the diaphragm, and the sound pressure level of the diaphragm in the mid and high frequency audio range is increased.
Bibliography:Application Number: CN200710167690