A Novel Method to Detect Location of the Sound Source with a High Accuracy Using Sound Sensors Array

Document Type : Original Article

Authors

1 Faculty Member, Department of Electrical Engineering, Technical and Vocational University (TVU), Tehran, Iran.

2 Assistant Professor, Department of Electrical Engineering, Technical and Vocational University (TVU), Tehran, Iran.

Abstract

Various research attempts have been investigated to navigate and locate source of the sound originated from the events such as firing, explosion and the human. Noting the importance of this subject in security and environmental protection organizations, a novel approach is presented to locate sound source with a higher accuracy and a lower response time. Conventionally, the proposed approach is based on the sound signal time difference of arrival (TDOA) received by a sound sensors array. The novelty is to use the simplified results of the deployed geometric equation system. Thanks to the special structure of the sensors array, without a need to the complicated mathematical calculations and a heavy processing, just by incorporating the values in the equations the required response is achieved with the highest accuracy and the lowest time. For the proof of the concept, a primary scheme which is based on a 3-microphone array is simulated. Due to the minor error (i.e., 0.12%), to detect the source with 100% probability a 4-microphone array is developed. Also, to confirm the effectiveness of the concept in the 3-D space, the scheme is extended to a 5-micophone array. The time delays readout error is proportional to the error of the detection of the target location, and this error is dependet on the quality and the specification of the utilized hardware. Alleviating the complexities in the conventional techniques, it decreases the process time and also the required hardware. Therefore, this method saves the implementation costs in the common applications.

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References

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Karafan Quarterly Scientific Journal
Volume 19, Issue 1 - Serial Number 57
Technical & Engineering
July 2022
Pages 459-480

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History

  • Receive Date: 12 September 2021
  • Revise Date: 05 May 2022
  • Accept Date: 21 May 2022

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