VOICE COIL FOR ELECTROACOUSTIC TRANSDUCER, ELECTROACOUSTIC TRANSDUCER EMPLOYING THE VOICE COIL, AND ELECTRONIC DEVICE AND APPARATUS EMPLOYING ELECTROACOUSTIC TRANSDUCER

摘要

PROBLEM TO BE SOLVED: To provide a voice coil for an electroacoustic transducer used for various acoustic apparatuses that enhances an output sound pressure level.;SOLUTION: The voice coil for an electroacoustic transducer is configured by decreasing the number of winding layers at the upper part of the voice coil coupled to a diaphragm more than the other parts. Through the configuration above, a part of the voice coil with a higher coil density is located to the position of a magnetic gap with a high magnetic flux so as to improve the utilizing efficiency of the magnetic flux thereby enhancing the output sound pressure level of the electroacoustic transducer.;COPYRIGHT: (C)2005,JPO&NCIPI