Magnetic Shielding
Magnetic shielding is a technique used in loudspeaker design to prevent the magnetic field generated by the driver's magnet from interfering with nearby electronic devices, particularly CRT (Cathode Ray Tube) displays. When a loudspeaker's magnet is positioned close to a CRT screen, it can distort the image by deflecting the electron beams in the CRT, causing color shifts and geometric distortions. The concept of magnetic shielding was developed to address this issue and improve the compatibility of loudspeakers with CRT displays, particularly in audio-visual systems and home theater setups. Magnetic shielding involves the use of specialized materials or structures that redirect or contain the magnetic field within the speaker enclosure, preventing it from affecting nearby devices.
The invention of magnetic shielding is attributed to the Bose Corporation, and the technique was popularized in the 1980s when home theaters and audio-visual systems with CRT displays became more prevalent. Amar Bose, the founder of Bose Corporation, and his team developed the technology to enhance the user experience by minimizing magnetic interference.
However, as technology advanced, CRT displays became less common in favor of newer display technologies like LCD, LED, and OLED. These modern display technologies are not susceptible to magnetic interference, making magnetic shielding less relevant and necessary in many audio systems today. Consequently the number of drivers with magnetic shielding have diminished, though some continue to be available.
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Exploring Common DIY Terminology - Magnetic Shielding
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Created by:
technodanvan
- Published: 31 July 2023, 15:00 Monday
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