Microspeaker module and method of enhancing its frequency response and electronic device

Abstract

The present invention discloses a method for enhancing frequency response of a miniature speaker module, a miniature speaker module, and an electronic device. The method for enhancing frequency response of a miniature speaker module comprises the steps of: additionally providing an inverted tube in a rear cavity of the miniature speaker module to form a second driver in the inverted tube when an active driver works, the second driver and the active driver radiating jointly; and matching enhancement processing the input signals of the active driver according to the vibrating amplitude characteristics of the diaphragm of the active driver of the miniature speaker module additionally provided with the inverted tube. In the technical solutions provided by the present invention, as the frequency response of the whole miniature speaker module additionally provided with an inverted tube is enhanced on frequency bands below F0, and the signals are further matching enhancement processed according to the vibrating amplitude characteristics of the active driver, the frequency resource of the miniature speaker module on the whole frequency bands is enhanced greatly.

Description

technical field [0001] The invention relates to the field of communication acoustics, in particular to a micro-speaker module, a method for enhancing the frequency response of the micro-speaker module, and electronic equipment. Background technique [0002] At present, in the field of communication acoustics, especially in the field of mobile terminal equipment (such as mobile phones, PADs, laptops, etc.), most of the micro dynamic speaker modules adopt a closed rear cavity design, and the acoustic drive components are wrapped by the shell , the rear cavity of the entire speaker module is closed. Due to the limitation of the size of the rear cavity and the volume of the product, the low-frequency resonance point F0 of the micro-speaker module is high, which cannot provide a low-frequency dive low enough. Related equalizers (EQ, equalizer) and bass enhancement algorithms are based on this kind of closed box micro-speaker design. In the frequency band below F0, due to the lim...

AI Technical Summary

Problems solved by technology

Due to the limitation of the size of the rear cavity and the volume of the product, the low-frequency resonance point F0 of the micro speaker module is high, which cannot provide a low-frequency dive low enough

Related equalizers (EQ, equalizer) and bass enhancement algorithms are based on this kind of closed box micro-speaker design. In the frequency band below F0, due to the limitation of the vibration amplitude of the existing diaphragm and the size of the components, it is impossible to achieve a real physical sense. Bass boosted and not loud enough

[0003] Furthermore, generally speaking, the use of enhancement algorithms in micro-speaker modules will cause the temperature of the voice coil and the rear cavity to rise when the amplitude of the electrical signal is amplified, which will bring hidden dangers to the reliability of the system.

The existing closed design usually only has a small sound leakage port, which cannot play the role of heat dissipation. The heat is generally exported through a large metal basin frame or heat conduction sheet, and the use of this metal heat dissipation method is generally harmful to the peripheral circuits of the equipment, especially the antenna. design is harmful

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