A method of improving speech intelligibility in an audio system
A speech clarity and audio system technology, applied in signal processing, sensor parts, sensors, etc., can solve problems such as voice clarity is not necessarily good, consumes power amplifier power, affects playback sound quality, etc., to improve language Clarity, the effect of reducing playback distortion and noise
Active Publication Date: 2022-05-27
SUN YAT SEN UNIV
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Problems solved by technology
The signal outside the cut-off frequency of the frequency response curve of the speaker is the part with poor playback ability of the speaker, which will cause some distortion and consume the power of the power amplifier, especially when the speaker reproduces a lot of low-frequency signals. affect the sound quality of playback, and even bring noise
[0007] In addition, even if the frequency response curve of the audio part of the conference system can be flattened, the speech clarity may not be very good
There are several reasons: the frequency band range is not wide enough, the main frequency components are not prominent enough, and the high-frequency harmonic components are insufficient
Method used
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[0042] The accompanying drawings are for illustrative purposes only, and should not be construed as limitations on this patent;
[0043] In order to better illustrate this embodiment, some parts of the drawings are omitted, enlarged or reduced, which do not represent the size of the actual product;
[0044] It will be understood by those skilled in the art that some well-known structures and their descriptions may be omitted from the drawings.
[0045] like figure 1 As shown, a method for improving the speech intelligibility of an audio system of the present invention includes the following steps:
[0046] S1: Find the upper and lower cut-off frequencies of the speaker frequency response curve, design low-pass and high-pass filters according to the upper and lower cut-off frequencies, limit the signal frequency between the upper and lower cut-off frequencies, and realize the frequency response curve between the speaker and the power amplifier match (corresponding to steps 1-...
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The present invention provides a method for improving the language clarity of an audio system. The method aims at the incomplete matching between the power amplifier and the sound box adopted in the prior art solution, and the frequency characteristics do not reflect the language characteristics, thereby affecting the language clarity. Problem, the present invention will increase the frequency response curve matching between the power amplifier and the speaker, so that the speaker only replays the signal within its effective frequency band, reducing the playback distortion and noise of the speaker to the sound signal. At the same time, according to the frequency response characteristics of the entire system, the size or composition of the frequency band signal with a high degree of speech intelligibility is adjusted, and finally the effect of improving the speech intelligibility of the conference system is achieved.
Description
technical field [0001] The present invention relates to the field of audio processing methods, and more particularly, to a method for improving speech intelligibility of an audio system. Background technique [0002] The conference system is widely used. The audio part of the system includes microphones, audio processing equipment, power amplifiers and speakers. It is mainly used to play human voices and hopes to have higher speech intelligibility. Audio signals involve many links, and each link may have an impact on speech intelligibility. In order to make the conference system have higher speech intelligibility, the commonly used methods are to deal with the matching between the power amplifier and the speaker, to flatten the frequency response curve of the system, and to select high-quality equipment. [0003] However, sometimes there are high-quality power amplifiers and speakers, but sometimes the volume feels too low, or the power amplifier or speakers are burned out....
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IPC IPC(8): H04R3/00H04M3/56
CPCH04R3/00H04M3/568H04R2430/00
Inventor 徐永键谭洪舟
Owner SUN YAT SEN UNIV