Loudspeaker having dual-membrane structure and driving method

Abstract

The invention discloses a loudspeaker having a dual-membrane structure, in particular to a moving-magnetic and piezoelectric composite broadband loudspeaker and a driving method of the loudspeaker. The composite loudspeaker comprises a housing and a vibrating element installed in the housing, wherein the vibrating element comprises a first vibrating element and a second vibrating element; the composite loudspeaker further comprises a moving-magnetic driving component used for driving the first vibrating element vibrate and a piezoelectric driving component used for driving the second vibrating element vibrate. The moving-magnetic driving component of the loudspeaker provided by the invention is mainly used for replaying low-mid pitch; the piezoelectric driving component is mainly used for replaying mid-high pitch; the moving-magnetic part and the piezoelectric part have the same aperture, which can ensure a lower resonance frequency and ensure a larger acoustical output; a magnet, a concentrating flux plate and a concentrating flux bowl are directly connected with a vibration unit, thereby increasing the vibration mass, reducing the resonance frequency and further enhancing the bass effect; the composite loudspeaker has the advantages of compact and light structure, wide frequency band and so on.

Description

technical field [0001] The invention relates to the technical field of loudspeakers, in particular to a dynamic-magnet and piezoelectric composite broadband loudspeaker with a double-diaphragm structure. Background technique [0002] The loudspeaker is an electric-force-acoustic transducer, which is an important component in audio equipment. Loudspeakers are widely used in people's daily life and bring a lot of convenience. In the fields of electronic products such as automobiles, radio, TV, speakers, mobile phones, MP4, computers, etc., the applications of loudspeakers can be seen almost everywhere. There are many types of loudspeakers, which can be divided into electric type (ie, moving magnet type), electrostatic type (ie, capacitive type), moving magnet type (ie, reed type), piezoelectric type, etc. according to their energy conversion principles; according to the frequency range It can be divided into woofers, midrange speakers, and tweeters, among which moving magnet ...

AI Technical Summary

Problems solved by technology

However, since piezoelectric ceramics and vibrating plates are much larger than the diaphragm stiffness of moving magnet speakers, the corresponding resonant frequency is obviously higher. Under the same caliber conditions, the low-frequency reproduction effect of the piezoelectric ceramic sounding part is obviously poor. Insufficient low-frequency bandwidth compared to traditional moving magnet speakers

However, due to the size limitation, the sound output of the small and medium-sized speakers in this patent is insufficient, and the low-frequency bandwidth is also insufficient, which may not be enough to make up for the overall low-frequency reproduction effect

Generally speaking, this patent belongs to a simple combined innovation of piezoelectric structure and moving magnetic structure, focusing on making up for the high-frequency sound quality of piezoelectric speakers through moving magnetic speakers, but the low-frequency characteristics and low-frequency bandwidth are not suitable for some high-demand Applications

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