What Are the Testing Standards for Sintered NdFeB Loudspeaker Magnets?

Have you ever wondered how the quality stability of sintered NdFeB magnets, which are crucial for loudspeaker performance, is tested? At TECOMAG, we’re here to explain the rigorous standards that ensure excellent sound quality and longevity in speakers.

Key Magnetic Properties

The magnetic performance of sintered NdFeB magnets is evaluated through three critical parameters:

1. 1.Remanence (Br): Determines the magnetic field strength the magnet can produce.

2. 2.Coercivity (Hc): Reflects the magnet’s resistance to external magnetic interference.

3. 3.Maximum Energy Product (BHmax): Represents the overall magnetic quality.
   These parameters must fall within specified ranges to ensure stable performance in various environments.
   

Dimensional Accuracy

Precise dimensions are vital for sintered NdFeB magnets. Even minor deviations can cause assembly issues, affecting sound transmission and quality. Strict dimensional control ensures seamless integration and optimal loudspeaker performance.

Surface Quality