Abstract
This paper presents a new audio signal enhancement method based on reflection signal detection in the reverberant environment. This technique enhances the audio signal from the target sound source in time domain. The advantages of this technique are enhancing the target sound source by a simple algorithm and reducing the background noise effectively. The effects of distances between the speaker and microphone and the coefficient of correlation are discussed in this paper. The coefficient of correlation is rising from 0.17 to 0.63 as the distance between the speaker and microphone is varying from 30 to 90 cm. Also, some antinoise experiments are carried out in this study and the results show that the audio enhancement algorithm provides a good antinoise performance in different background noise levels.
Highlights
Speech is a very important communication tool for humanity and it is the most convenient way to deliver messages
This paper presents a new method to enhance the audio signal in the reverberant environment by using the reflected signal of the target sound source
This paper presents the audio enhancement algorithm which is based on reflection signal detection in the reverberant environment
Summary
Speech is a very important communication tool for humanity and it is the most convenient way to deliver messages. Most communication equipment receives the speech signals by microphones and sends the signals to other equipment by some wireless technologies. The speech signals will be reflected by the walls, tables, and ceilings and other objects cannot absorb voice completely. When a microphone is used to receive the speech signal in the indoor environment, the environmental noise and the reflected voice are all considered as noise. A popular method to reduce the noise is to set some sound-absorbing material in the indoor environment. Using sound-absorbing materials to build walls and ceilings is a common method to reduce the reflected voice. This method is widely used in the auditoriums and lecture theatres. Some antinoise experiments are carried out in this study
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