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Appl. Sci. 2017, 7(9), 877; doi:10.3390/app7090877

A Low Cost Wireless Acoustic Sensor for Ambient Assisted Living Systems

1
Telematic Engineering Department, University of Las Palmas de Gran Canaria, Campus Universitario de Tafira, 35017 Las Palmas de Gran Canaria, Spain
2
Institute for Technological Development and Innovation in Communications, University of Las Palmas de Gran Canaria, Campus Universitario de Tafira, 35017 Las Palmas de Gran Canaria, Spain
3
Signal and Communications Department, University of Las Palmas de Gran Canaria, Campus Universitario de Tafira, 35017 Las Palmas de Gran Canaria, Spain
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Tapio Lokki
Received: 31 July 2017 / Revised: 24 August 2017 / Accepted: 25 August 2017 / Published: 27 August 2017
(This article belongs to the Special Issue Sound and Music Computing)
View Full-Text   |   Download PDF [1629 KB, uploaded 21 September 2017]   |  

Abstract

Ambient Assisted Living (AAL) has become an attractive research topic due to growing interest in remote monitoring of older people. Development in sensor technologies and advances in wireless communications allows to remotely offer smart assistance and monitor those people at their own home, increasing their quality of life. In this context, Wireless Acoustic Sensor Networks (WASN) provide a suitable way for implementing AAL systems which can be used to infer hazardous situations via environmental sounds identification. Nevertheless, satisfying sensor solutions have not been found with the considerations of both low cost and high performance. In this paper, we report the design and implementation of a wireless acoustic sensor to be located at the edge of a WASN for recording and processing environmental sounds which can be applied to AAL systems for personal healthcare because it has the following significant advantages: low cost, small size, audio sampling and computation capabilities for audio processing. The proposed wireless acoustic sensor is able to record audio samples at least to 10 kHz sampling frequency and 12-bit resolution. Also, it is capable of doing audio signal processing without compromising the sample rate and the energy consumption by using a new microcontroller released at the last quarter of 2016. The proposed low cost wireless acoustic sensor has been verified using four randomness tests for doing statistical analysis and a classification system of the recorded sounds based on audio fingerprints. View Full-Text
Keywords: wireless acoustic sensor; ambient assisted living; internet of things; edge computing; low cost; ESP32 wireless acoustic sensor; ambient assisted living; internet of things; edge computing; low cost; ESP32
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Quintana-Suárez, M.A.; Sánchez-Rodríguez, D.; Alonso-González, I.; Alonso-Hernández, J.B. A Low Cost Wireless Acoustic Sensor for Ambient Assisted Living Systems. Appl. Sci. 2017, 7, 877.

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