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Rotating acoustic reflector parameter trade-off for near-outdoor audio event detection

Bhagwat, G and Jayaprakash, S and Bhowmick, A (2021) Rotating acoustic reflector parameter trade-off for near-outdoor audio event detection. In: 2nd International Conference on Electrical and Electronics Engineering, ICEEE 2021, 2-3 Jan 2021, Online, pp. 567-582.

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Official URL: https://doi.org/10.1007/978-981-16-0749-3_44


Present visual surveillance systems have limitations, like poor data in low or no lighting conditions, non-line of sight, large data storage. An audio surveillance system would better suit to overcome these limitations and complement the visual surveillance, especially for large area and outdoor conditions. In this paper, we have explored the development and use of a rotating parabolic reflector microphone for near outdoor audio recording. The low-cost rotating reflector brings out interesting trade-off between its size and its speed of rotation for both sensitivity and directionality. Specific improvement to the shape of the reflector and the type of microphone along with suitable rotational speed has shown promise of effective audio signal recording economically. It has also brought out the issue of audio event duration and its spectral content for effective detection. We demonstrate the utility of such an audio sensor system for a small-scale audio event classification task, using a hierarchical classification scheme. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021.

Item Type: Conference Paper
Publication: Lecture Notes in Electrical Engineering
Publisher: Springer Science and Business Media Deutschland GmbH
Additional Information: The copyright for this article belongs to Springer Science and Business Media Deutschland GmbH
Keywords: Audio recordings; Costs; Digital storage; Economic and social effects; Microphones; Monitoring; Reflection; Security systems, Acoustic reflectors; Audio event detection; Audio surveillance; Hierarchical classification; Lighting conditions; Parabolic reflector; Visual surveillance; Visual surveillance systems, Audio acoustics
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited: 30 Aug 2021 09:43
Last Modified: 30 Aug 2021 09:43
URI: http://eprints.iisc.ac.in/id/eprint/69516

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