Estimation of Cough Peak Flow Using Cough Sounds
Cough peak flow (CPF) is a measurement for evaluating the risk of cough dysfunction and can be measured using various devices, such as spirometers. However, complex device setup and the face mask required to be firmly attached to the mouth impose burdens on both patients and their caregivers. Theref...
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doaj-c23f4e5f0dfd43ceb9da3ef860dac45a2020-11-25T02:45:13ZengMDPI AGSensors1424-82202018-07-01187238110.3390/s18072381s18072381Estimation of Cough Peak Flow Using Cough SoundsYasutaka Umayahara0Zu Soh1Kiyokazu Sekikawa2Toshihiro Kawae3Akira Otsuka4Toshio Tsuji5Department of System Cybernetics, Institute of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, JapanDepartment of System Cybernetics, Institute of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, JapanDivision of Physical Analysis and Therapeutic Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8553, JapanDivision of Rehabilitation, Department of Clinical Support, Hiroshima University Hospital, Hiroshima 734-8551, JapanDepartment of Rehabilitation, Faculty of Health Sciences, Hiroshima Cosmopolitan University, Hiroshima 731-3166, JapanDepartment of System Cybernetics, Institute of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, JapanCough peak flow (CPF) is a measurement for evaluating the risk of cough dysfunction and can be measured using various devices, such as spirometers. However, complex device setup and the face mask required to be firmly attached to the mouth impose burdens on both patients and their caregivers. Therefore, this study develops a novel cough strength evaluation method using cough sounds. This paper presents an exponential model to estimate CPF from the cough peak sound pressure level (CPSL). We investigated the relationship between cough sounds and cough flows and the effects of a measurement condition of cough sound, microphone type and participant’s height and gender on CPF estimation accuracy. The results confirmed that the proposed model estimated CPF with a high accuracy. The absolute error between CPFs and estimated CPFs were significantly lower when the microphone distance from the participant’s mouth was within 30 cm than when the distance exceeded 30 cm. Analysis of the model parameters showed that the estimation accuracy was not affected by participant’s height or gender. These results indicate that the proposed model has the potential to improve the feasibility of measuring and assessing CPF.http://www.mdpi.com/1424-8220/18/7/2381cough soundcough peak flowmicrophonecough abilitycough strengthin-ear microphonesmartphone |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yasutaka Umayahara Zu Soh Kiyokazu Sekikawa Toshihiro Kawae Akira Otsuka Toshio Tsuji |
spellingShingle |
Yasutaka Umayahara Zu Soh Kiyokazu Sekikawa Toshihiro Kawae Akira Otsuka Toshio Tsuji Estimation of Cough Peak Flow Using Cough Sounds Sensors cough sound cough peak flow microphone cough ability cough strength in-ear microphone smartphone |
author_facet |
Yasutaka Umayahara Zu Soh Kiyokazu Sekikawa Toshihiro Kawae Akira Otsuka Toshio Tsuji |
author_sort |
Yasutaka Umayahara |
title |
Estimation of Cough Peak Flow Using Cough Sounds |
title_short |
Estimation of Cough Peak Flow Using Cough Sounds |
title_full |
Estimation of Cough Peak Flow Using Cough Sounds |
title_fullStr |
Estimation of Cough Peak Flow Using Cough Sounds |
title_full_unstemmed |
Estimation of Cough Peak Flow Using Cough Sounds |
title_sort |
estimation of cough peak flow using cough sounds |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2018-07-01 |
description |
Cough peak flow (CPF) is a measurement for evaluating the risk of cough dysfunction and can be measured using various devices, such as spirometers. However, complex device setup and the face mask required to be firmly attached to the mouth impose burdens on both patients and their caregivers. Therefore, this study develops a novel cough strength evaluation method using cough sounds. This paper presents an exponential model to estimate CPF from the cough peak sound pressure level (CPSL). We investigated the relationship between cough sounds and cough flows and the effects of a measurement condition of cough sound, microphone type and participant’s height and gender on CPF estimation accuracy. The results confirmed that the proposed model estimated CPF with a high accuracy. The absolute error between CPFs and estimated CPFs were significantly lower when the microphone distance from the participant’s mouth was within 30 cm than when the distance exceeded 30 cm. Analysis of the model parameters showed that the estimation accuracy was not affected by participant’s height or gender. These results indicate that the proposed model has the potential to improve the feasibility of measuring and assessing CPF. |
topic |
cough sound cough peak flow microphone cough ability cough strength in-ear microphone smartphone |
url |
http://www.mdpi.com/1424-8220/18/7/2381 |
work_keys_str_mv |
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