Howling Detection and Rejection in Public Address System

Authors

  • Rachu Punchalard Department of Electrical Engineering, Faculty of Industrial Technology
  • Prayuth Inban Department of Electrical Engineering, Faculty of Industrial Technology

Keywords:

Public address system, Howling, Howling detector, Notch filter, Adaptive filter

Abstract

This paper presents howling detection and rejection for public address audio systems. The proposed system has two main components: the howling detector and the howling eliminator. Since howling is a random signal whose exact amplitude, frequency, and phase are not known, adaptive notch filters (ANFs) have been used to overcome howling. To detect the presence of howling in the systems, we consider the ANF coefficient. The howling, suppressed speech is measured at the output of the ANF. The results of the computer program showed that the howling detector worked well in the frequency range 500 Hz–4000 Hz, at a sampling frequency of 8000 Hz, and at a howling intensity rating of 100% of the peak of the speech signal.  

References

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Published

2023-12-08

How to Cite

Punchalard, R., & Inban, P. . (2023). Howling Detection and Rejection in Public Address System. Science Journal, Chandrakasem Rajabhat University, 33(2), 105–115. retrieved from https://ph03.tci-thaijo.org/index.php/scicru/article/view/655

Issue

Section

Research Articles