Passive wideband concentric rings resonator for vocal cords abnormalities detection: Application on larynx cancer pathologies

Abstract

This work addresses the study and design of a diagnostic device consisting of a thin-film sensor array based on 8-mm concentered rings, acting as an autonomous acoustic sensor covering a wide range of resonance frequencies (0.1 KHz-2 MHz). In addition to its advantageous shape, this device integrates both the active vibratory element and the embedded electronics dedicated to coding, control, and analysis. The results show that the experimental device could be the basis of a telemedical platform for the objective assessment and monitoring of chronic laryngeal dysphonia through the spectro-temporal analysis of the vibration of the vocal cords. Furthermore, this non-invasive, non-intrusive protocol does not require the physical cooperation of the patient.

Objective Assessment of Covid-19 Severity Affecting the Vocal and Respiratory System Using a Wearable, Autonomous Sound Collar

“…As mentioned above, the collar that is the subject of this study is an extension of the device used in the work of Matta. 32 Flexible bio-compatible poly-vinylidene-fluoride polymer (PVDF) sensors were used to ensure a fairly wide frequency bandwidth covering both the respiratory (pulmonary) and phonatory mechanism. These sensors made from electro-active nanowires resulting from electrospinning technology 28 , 49 were added and used in place of the concentric ring PZT receptors (PZ26 Ferroperm Sct.)…”

“…The average consumption of the collar is 0.026 mA when the power unit is on standby (until the vibration of the vocal cords activates the system). Associating a user interface with the collar functionalities has turned this concept into a medical platform capable of evolving and adapting to an e-Health environment under the TCP/IP 32 , 35 protocol and/or via a specific smartphone application for remote physiological monitoring 22 (Fig. 4 ).…”

“…Recently, Matta 32 published a study on an acoustic technique analysing the vibratory components of the vocal system for the diagnosis and early detection of a potential cancerous state. The results of this technique highlighted the dependence of the vibratory characteristics of the collar on the pathophysiological state of the patient.…”

“…The results of this technique highlighted the dependence of the vibratory characteristics of the collar on the pathophysiological state of the patient. The current work is an extension of the passive sound device used by Matta 32 and Ishac 26 , 27 for the early detection of abnormalities of the laryngeal apparatus. This extension concerns additional hardware and algorithmic modules ensuring the combination of physiological data flows for the objective analysis of the severity of the effects of the Covid-19 virus.…”