Publication: PROTOTIPO DE CAPTURA Y ENVÍO INALÁMBRICO DE SEÑALES DE SALUD VOCAL PROVENIENTE DE UN ACELERÓMETRO
Date
2016-07
Authors
VERA ANDERS, FELIPE IGNACIO
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Abstract
Los desórdenes de voz se relacionan principalmente con el mal uso de las cuerdas vocales, lo
cual se denomina como “hiper-función vocálica”. Un fonoaudiólogo puede ordenar una terapia
de higiene vocal para corregir malos hábitos de uso vocal, sin embargo, como el método de
diagnóstico y cuantificación del progreso del tratamiento depende altamente de la percepción
del paciente, este está sujeto a inexactitudes que podrı́an mejorarse si sus hábitos vocales son
supervisados de una manera sistemática.
Para ello, se ha creado un sensor de señales de salud vocal que emplea la conector de audio
de un Smartphone. Sin embargo esto conlleva una serie de inconvenientes relacionados con
el alto consumo de baterı́a del teléfono inteligente, dependencia del hardware del equipo, y la
invasividad que conlleva usar un dispositivo cableado en todo momento.
Por eso, en este trabajo se diseña de manera preliminar un dispositivo modular que permita
determinar la factibilidad de diseño de un dispositivo inalámbrico que permita capturar una
señal de acelerómetro sin distorsión, almacenarla en una memoria persistente, lograr al menos
un dı́a completo de funcionamiento ininterrumpido y enviar información relevante a un teléfono
celular de forma inalámbrica.
Se realizan pruebas para cuantificar parámetros crı́ticos para conocer la factibilidad de di-
seño -distorsión armónica del ADC, consumo de potencia, capacidad de cálculo y ancho de
banda Bluetooth-. Los resultados obtenidos determinan que un diseño final con las exigencias
necesarias es factible. Además, el cálculo local de parámetros de señal prueba ser más eficiente
que el envı́o de la señal sin pérdidas para su posterior procesamiento.
Voice diseases are caused, in its majority, by the misuse of vocal folds, namely “vocal hyper-function”. Those diseases can be avoided if diagnosed and prevented before any damage is done. An expert can order a vocal hygiene therapy to fix wrong voice use behaviors, but this method bears some inaccuracies that can be improved if the subject’s vocal behavior is watched and supervised in a systematic way. To provide helpful data to support diagnosis and treatment of dangerous voice patterns, re- search has been made, using movement signals from an accelerometer attached to a subject’s collarbone. This accelerometer is connected to a Smartphone through an analog adapter to its handsfree audio input/output. However, this device has some problems -high Smartphone bat- tery power consumption, phone hardware specifications dependency and being uncomfortable to wear and use- which makes it unfit to be released to public. Thus, in this work, a modular device is designed in order to determine the feasibility of creation of a wireless system to capture an accelerometer signal with low distortion, store it in a permanent memory, achieve at least an entire day of continued functionality and send relevant information to a Smartphone using wireless protocols. To calculate critical parameters for the feasibility of design of the device -ADC harmonic distortion, power consumption, calculation power and Bluetooth bandwidth-, several series of tests are performed. As a result of these tests, it’s known that a device with the given portability and functionality is feasible, and that local parameter calculation is more power and wireless bandwidth efficient than sending the whole, raw signal to a Smartphone.
Voice diseases are caused, in its majority, by the misuse of vocal folds, namely “vocal hyper-function”. Those diseases can be avoided if diagnosed and prevented before any damage is done. An expert can order a vocal hygiene therapy to fix wrong voice use behaviors, but this method bears some inaccuracies that can be improved if the subject’s vocal behavior is watched and supervised in a systematic way. To provide helpful data to support diagnosis and treatment of dangerous voice patterns, re- search has been made, using movement signals from an accelerometer attached to a subject’s collarbone. This accelerometer is connected to a Smartphone through an analog adapter to its handsfree audio input/output. However, this device has some problems -high Smartphone bat- tery power consumption, phone hardware specifications dependency and being uncomfortable to wear and use- which makes it unfit to be released to public. Thus, in this work, a modular device is designed in order to determine the feasibility of creation of a wireless system to capture an accelerometer signal with low distortion, store it in a permanent memory, achieve at least an entire day of continued functionality and send relevant information to a Smartphone using wireless protocols. To calculate critical parameters for the feasibility of design of the device -ADC harmonic distortion, power consumption, calculation power and Bluetooth bandwidth-, several series of tests are performed. As a result of these tests, it’s known that a device with the given portability and functionality is feasible, and that local parameter calculation is more power and wireless bandwidth efficient than sending the whole, raw signal to a Smartphone.
Description
Keywords
SALUD VOCAL , CUERDAS VOCALES , PROTOTIPO , FACTIBILIDAD , INALÁMBRICO