Method and system for adjusting amplitude of speaker diaphragm

Abstract

The embodiment of the invention provides a method and system for adjusting the amplitude of a speaker diaphragm. The method comprises the steps of: first determining an electrodynamic model and a mechanical dynamic model of a speaker through relevant parameters of the speaker; determining the expression of a S domain / Z domain transfer function of the speaker according to the electrodynamic model and the mechanical dynamic model; predicting the amplitude of a speaker diaphragm through the expression of the S domain / Z domain transfer function of the speaker; and adjusting the gain of the speakersuch that the predicted amplitude of the speaker diaphragm does not exceed a physical limit value of the speaker diaphragm. The method and the system adjust the gain of the speaker in advance by predicting the amplitude of the speaker diaphragm, thereby preventing the amplitude of the speaker diaphragm from exceeding the physical limit value, and ensuring that the speaker obtains the largest possible volume without being damaged. Moreover, there is no need for additional processing of the speaker, no need to measure current in real time, so the method and the system have advantages of low cost and lower speaker battery loss.

Description

Technical field [0001] The embodiments of the present invention relate to the technical field of loudspeakers, and more specifically, to a method and system for adjusting the amplitude of a loudspeaker diaphragm. Background technique [0002] At present, due to the special physical structure of the speaker, the amplitude of each speaker diaphragm has a physical limit. When the amplitude of the speaker diaphragm exceeds the physical limit for a long time, it will cause irreversible mechanical damage to the speaker. Since people have a certain demand for the volume of the speaker, it is inevitable to increase the volume of the input signal. Therefore, it is an urgent problem to obtain the largest possible volume while ensuring that the speaker is not damaged. [0003] There is a gain control method and device in the prior art. Firstly, N (N≥2) thresholds of different levels are set. When the output signal exceeds the set threshold, the higher the level, the faster the output gain wil...

AI Technical Summary

Problems solved by technology

This method can monitor the amplitude of the speaker diaphragm in real time, and then adjust the output gain in time, but it cannot prevent the amplitude of the speaker diaphragm from exceeding the physical limit. It can only be adjusted in time when the amplitude exceeds the physical limit. Corresponding Predictive Protection Mechanism

When the input signal and output gain are both large in a short period of time, the amplitude of the diaphragm may greatly exceed the physical limit in a short period of time, which will also cause irreversible mechanical damage to the speaker

In addition, this method needs to place a capacitive plate on the surface of the speaker's diaphragm, which will increase the cost of the speaker, and also needs to be connected in series with the power supply and current detection device to form a loop, which will not only increase the project cost Battery drain on mobile apps

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