Specific impact of magnetic circuit design on voice coil distortion control

Magnetic circuit design is a crucial aspect. Magnetic circuit design not only affects the vibration stability and efficiency of the voice coil, but is also directly related to the distortion control of the speaker during audio reproduction.
Basic principles of magnetic circuit design
Uniform magnetic field distribution: In order to reduce distortion, the magnetic circuit design should ensure that the magnetic field distribution is as uniform as possible within the vibration range of the voice coil. This requires that the shape, size and arrangement of the magnets are carefully calculated and optimized to produce a stable magnetic field environment.
Magnetic gap optimization: The magnetic gap is the space in which the voice coil vibrates, and its size and shape have a direct impact on distortion control. A too small magnetic gap may cause the voice coil to collide with the edge of the magnet during vibration, resulting in mechanical distortion; while a too large magnetic gap may reduce the magnetic field strength and affect the vibration efficiency of the voice coil.
Anti-magnetic design: In order to prevent the magnetic field inside the speaker from interfering with external equipment, the magnetic circuit design also needs to consider anti-magnetic measures. This includes the use of anti-magnetic materials, optimizing the magnet layout, and setting up anti-magnetic shields.
Specific impact of magnetic circuit design on voice coil distortion control
Harmonic distortion control: Harmonic distortion is a major form of speaker distortion, which is mainly caused by the nonlinear vibration of the voice coil in the magnetic field. By optimizing the magnetic circuit design, such as reducing the non-uniformity of the magnetic gap and improving the uniformity of the magnetic field distribution, the generation of harmonic distortion can be reduced.
Intermodulation distortion control: Intermodulation distortion is caused by the interaction of signals of different frequencies in the speaker. The magnetic circuit design can reduce the interaction between signals of different frequencies by adjusting the arrangement of the magnets and the distribution characteristics of the magnetic field, thereby reducing the occurrence of intermodulation distortion.
Transient distortion control: Transient distortion refers to the distortion caused by the speaker's inability to respond in time to a rapidly changing audio signal. The magnetic circuit design can improve the transient characteristics of the speaker by improving the response speed and stability of the magnetic field, thereby reducing the occurrence of transient distortion.