Method for removing loundspeaker noise

Abstract

The invention is concerned with the method to eliminate the puff of the loudhailer, it is: the message playing equipment outputs a pause order or a stop order to the loudhailer, the controlling groupware in the loudhailer closes the playing sound of the loudhailer by the tapering way. The invention can prevent the puff and improve the listening quality of the USB loudhailer.

Description

technical field [0001] The invention relates to a sound effect processing method, in particular to a method capable of removing popping sound from a loudspeaker. Background technique [0002] Loudspeakers are commonly known as horns, and their operating principle is a converter that converts electrical signals into sound signals. The speaker is an important component of the sound output end of electronic products. It has a wide range of applications and can be installed in various earphones or headsets, such as walkmans, audio, radio communications, multimedia computers, recording engineering or electronic dictionaries, to listen to sounds with music. [0003] At present, the most commonly used audio connection interface is the audio input terminal (Phone Jack). The specification of this audio input terminal is usually 3.5mm in diameter and is output or input in stereo, and the audio transmission rate is usually between 128k ~ 384k bit / s However, this kind of known audio i...

AI Technical Summary

Problems solved by technology

[0003] At present, the most commonly used audio connection interface is the audio input terminal (Phone Jack). The specification of this audio input terminal is usually 3.5mm in diameter and is output or input in stereo, and the audio transmission rate is usually between 128k ~ 384k bit / s However, this kind of known audio input terminal will be gradually replaced by a universal serial bus (Universal Serial Bus, USB) transmission interface. This USB transmission interface has the advantages of convenient connection, plug and play, no additional power supply, and fast transmission speed. The transmission rate is between 1Mbps (Low Speed) and 480Mbps (High Speed), which is much higher than the traditional audio input terminal. However, because the speaker itself is driven by a digital amplifier, this amplifier will transmit the data transmitted by the interface. The digital audio source signal is processed and converted into positive and negative current output to make the speaker emit sound. In this way, the speaker (USB speaker) with USB as the transmission interface has a problem. The instantaneous change of the sound source is too large, causing the speaker to emit popping sound. Therefore, how to solve this problem of popping sound is a problem that the industry needs to solve urgently.

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