Title :
Reduction of harmonic distortion in dual magnet type microspeaker
Author :
Hwang, Sang-Moon ; Hong, Keum-Shik ; Lee, Hong-Joo ; Kim, Ji-Hoon ; Jeung, Seung-Kyu
Author_Institution :
Sch. of Mech. Eng., Pusan Nat. Univ., South Korea
fDate :
7/1/2004 12:00:00 AM
Abstract :
Harmonic distortion due to uneven magnetic fields is becoming more important in mobile phones to generate high quality sound. In this paper, analysis of sound pressure level and reduction of harmonic distortion is presented by considering mechanical and magnetic coupling effects. It shows that high-performance microspeakers with lower harmonic distortion is realizable with proper magnetic circuit design. Experimental verification is also followed for dual magnet-type microspeakers.
Keywords :
electromagnetic coupling; harmonic distortion; loudspeakers; magnetic circuits; magnetomechanical effects; mobile handsets; network synthesis; dual magnet-type microspeaker; harmonic distortion reduction; high quality sound generation; high-performance microspeaker; magnetic circuit design; magnetic coupling effects; magnetic fields; mechanical coupling effects; mobile phones; sound pressure level analysis; Coils; Equations; Harmonic analysis; Harmonic distortion; Loudspeakers; Magnetic analysis; Magnetic fields; Magnetic flux; Magnetic resonance; Mobile handsets; Harmonic distortion; magnetic circuit; microspeaker; mobile phone;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2004.832114
