Advertisement

Experiments of Acoustic Event Detection and Localization in an Underground Station

  • M. Omologo
  • P. Svaizer
Part of the Research Reports Esprit book series (ESPRIT, volume 1)

Abstract

This paper deals with the use of linear microphone arrays for detection and localization of acoustic events in real noisy environment. During the ESPRIT project DIMUS (ESPRIT 5345) a prototype was developed that provided high performance in a demonstration room. The envisaged application is an acoustic surveillance system to be installed in an underground station (DIMUS project ESPRIT 5345). For this purpose, some scenarios were defined in a real station and some preliminary experiments were conducted to verify system robustness. The results show satisfactory performance in detecting and localizing impulsive events (e.g. explosions), while there is a slight drawback for other events (e.g. screams). Due to this, further study is needed concerning the system adaptation to real environment, characterized by critical noise and reverberation components.

Keywords

Underground Station Noisy Environment Acoustic Event Impulsive Event Coherence Measure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    G. C. Carter “Special Issue on Time Delay Estimation”, IEEE Trans, on Acoustics, Speech and Signal Processing, Vol. ASSP-29, Part 2, June 1981.Google Scholar
  2. [2]
    J. L. Flanagan, J. D. Johnston, R. Zahn, G. W. Elko “Computer steered Microphone Arrays for Sound Transduction in Large Rooms”, J.Acoust.Soc., Vol. 78, No. 5, pp. 1508–1518, November 1985.CrossRefGoogle Scholar
  3. [3]
    H. F. Silverman, “Some Analysis of Microphone Arrays for Speech Data Acquisition”, IEEE Trans, on Acoustics, Speech and Signal Processing, Vol. ASSP-35, No. 12, December 1987.Google Scholar
  4. [4]
    J. L. Flanagan, H. F. Silverman, “Material for International Workshop on Microphone Array Systems: Theory and Practice”, Techn.Report LEMS-113, Division of Engineering, Brown University, October 1992.Google Scholar
  5. [5]
    M. Omologo, P. Svaizer, “Acoustic Event Detection and Localization in a Noisy Environment”, ESPRIT PROJECT 5345 DIMUS Report No. 921130, October 1992.Google Scholar
  6. [6]
    C. H. Knapp, G. C. Carter “The Generalized Correlation Method for Estimation of Time Delay”, IEEE Trans, on Acoustics, Speech and Signal Processing, Vol. ASSP-24, No. 4, August 1976.Google Scholar
  7. M. Omologo, P. Svaizer “Talker Localization and Speech Enhancement in a Noisy Environment Using a Microphone Array based Acquisition System”, Proc. of EUROSPEECH-93, pp.605–608, Berlin, 1993.Google Scholar

Copyright information

© ECSC-EC-EAEC, Brussels-Luxembourg 1995

Authors and Affiliations

  • M. Omologo
    • 1
  • P. Svaizer
    • 1
  1. 1.IRST - Istituto per la Ricerca Scientifica e TecnologicaPovo di TrentoItaly

Personalised recommendations