A micro speaker and a speaker assembly thereof

By designing a miniature loudspeaker and combining it with the viscosity control of magnetorheological fluid, the bottleneck of low-frequency sound absorption performance and system complexity of loudspeakers have been solved, achieving a compact, low-cost, wide-band sound absorption effect and improving the bass uniformity and high-frequency signal-to-noise ratio of the loudspeaker.

CN120568255BActive Publication Date: 2026-05-12DONGGUAN JIALAN ELECTRONICS TECH CO LTD
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Patent Information

Application Number
CN202510748838.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-06-06
Publication Date
2026-05-12
Estimated Expiration
2045-06-06

AI Technical Summary

Technical Problem

Existing loudspeakers have limited low-frequency sound absorption performance, high system complexity, and difficulty in maximizing wideband sound absorption efficiency in a compact space. Traditional active and passive composite sound absorption structures are bulky and costly, and the simplification of sound field control theory leads to insufficient stability of the sound absorption frequency band in practical applications.

Method used

Employing a miniature loudspeaker design, including a diaphragm, paper tube, sound-absorbing components, and induction unit, it utilizes the viscosity change of magnetorheological fluid to increase the sound absorption coefficient at low frequencies and decrease it at high frequencies. Through the cooperation of induction coil and permanent magnet turntable, it precisely matches the sound absorption requirements of the target frequency band.

Benefits of technology

It achieves low-frequency noise cancellation and high-frequency noise suppression within a limited volume, avoids loss of sound details, improves bass uniformity and high-frequency signal-to-noise ratio, and reduces system complexity and cost.

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Abstract

The present application relates to acoustic equipment technology, and discloses a micro loudspeaker, which comprises a loudspeaker assembly and a sound absorption assembly.The loudspeaker assembly comprises a diaphragm and a paper tube, and the paper tube is provided with a second ball groove at the end thereof.The sound absorption assembly comprises a fixed cavity and an induction unit, and the induction unit is used for increasing the sound absorption coefficient at low frequency and suppressing the sound absorption coefficient at high frequency.At low frequency, the current of the induction coil is increased, the magnetic field intensity of the induction coil is increased, the viscosity of the magneto-rheological fluid is increased, and the sound absorption coefficient is increased.At high frequency, the current of the induction coil is reduced, the magnetic field intensity of the induction coil is reduced, the viscosity of the magneto-rheological fluid is reduced, the sound absorption coefficient is reduced, and the sound absorption requirement of the target frequency band is accurately matched.The present application further discloses a loudspeaker assembly which is composed of one or more micro loudspeakers.
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