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Table 3 Deep learning methods in lung sound analysis

From: Deep learning-based lung sound analysis for intelligent stethoscope

Task

Year

Ref

Basic method

Dataset

Outcome

ASD

2013

[126]

Wavelets, FNN

Self-collected, 13 healthy, 13 pathological

Normal or crackle: ACC—71.55%

2014

[117]

Wavelets, FNN

Lehrer's dataset

Normal, wheeze or crackle: ACC—99.26%

2016

[132]

MFCCs, LFCCs, FNN

RALE database,

IIT Kharagpur,

Salt Lake, Kolkata

Normal, wheeze or crackle: ACC—97.61%, SEN—97.41%, SPE—98.33%

2018

[33]

Spectrogram, CNN

RALE dataset

Coarse crackle, fine crackle, polyphonic wheeze, monophonic wheeze, normal, squawk, stridor: ACC—95.56%

2018

[127]

MFCCs, RNN

Self-collected, 10 healthy, 5 idiopathic pulmonary fibrosis

Inspiration: F1—87%;

Expiration: F1—84.6%;

Crackles: F1—72.1%

2018

[147]

LSTM

ICBHI 2017

Normal, crackles, wheezes, and both crackles and wheezes: SEN—58.4%, SPE—73.0%, AS—65.7%

2019

[133]

Spectrogram, CNN

Self-collected, 50 pediatric patients

Wheeze, rhonchi, fine crackle, or coarse crackles: recall—76.5%, precision—53.0%, SPE—83.6%, F1—62.5%

2019

[148]

Spectrogram, CNN

CBHI 2017

Normal, crackles, wheezes, and both crackles and wheezes: SEN—31.12%, SPE—68.20%, AS—50.16%

2020

[23]

Mel spectrogram, CNN

ICBHI 2017

Normal, crackles, wheezes, and both crackles and wheezes: SEN—48.63%, SPE—84.14%, AS—66.38%

2020

[131]

Mel spectrogram, CNN

ICBHI 2017

Normal, crackles, wheezes, and both crackles and wheezes: AS—78.4%; normal and abnormal: AS—83.7%

2020

[136]

Mel Spectrogram, CNN

ICBHI 2017

Normal, wheeze or crackle: ACC—98.6%, F1—98.4%

2020

[149]

Spectrogram, LSTM, CNN, autoencoder

Self-collected, 22 patients

Inspiration or expiration: ACC—92%

2020

[150]

Spectrogram, CNN

Self-collected, 25 pediatric patients

Normal, wheeze or crackle: crackle PPA—95%, NPA—99%; wheeze PPA—90%, NPA—97%

2020

[151]

Spectrogram, CNN

RALE database,

Think labs Lung sound library

Normal, crackles, wheezes, or rhonchi: ACC—83.78%

2021

[22]

Spectrogram, CNN

ICBHI 2017

Normal, crackles, wheezes, and both crackles and wheezes: SPE—85.44%, SEN—70.93%, AS—78.18%

2021

[72]

Mel spectrogram, CNN

ICBHI 2017

Normal, crackles, wheezes, and both crackles and wheezes: SPE—72.3%, SEN—40.1%, AS—56.2%;

Normal or abnormal: SPE—80.9%, SEN—73.1%, AS—77.0%

2021

[77]

CNN

Self-collected, 1918 respiratory sound record

Normal, abnormal (crackles, wheezes, rhonchi): ACC—84.8%, precision—81.4%, recall—81.7%, F1—81.4%

2021

[152]

Spectrogram, CNN, autoencoder

ICBHI 2017

Normal, crackles, wheezes, and both crackles and wheezes: SPE—69%, SEN—29%, AS—49%

2023

[82]

Spectrogram, CNN

Self-collected, 105 health, 189 patients

Normal, crackles, or rhonchi: ACC—83%

2022

[130]

Mel spectrogram, CNN

ICBHI 2017

Normal, crackles, wheezes, and both crackles and wheezes: ACC—84.7%, SEN—84.5%, SPE—84.9%, precision—84.4%, recall—89.0%, F1—86.6%

2022

[134]

Spectrogram, CNN

ICBHI 2017

Normal, crackles, wheezes, and both crackles and wheezes: SPE—85.6%, SEN—29%, AS—57.3%

2022

[135]

Mel spectrogram, TCN

ICBHI 2017

Normal, crackles, wheezes, and both crackles and wheezes: SPE—86.1%, SEN—65.3%, AS—75.7%

2022

[137]

LSTM, CNN

ICBHI 2017

Normal, crackles, wheezes, and both crackles and wheezes: SPE—82.46%, SEN—47.37%, AS—64.92%

2022

[146]

Spectrogram, Mel spectrogram, CNN

ICBHI 2017

Crackles or others: ACC—86.4%;

Wheezes or others: ACC—78.2%;

Crackles, wheezes, or others: ACC—84.5%

RDR

2013

[153]

Statistical feature, FNN

Self-collected, 27 healthy and 33 tuberculosis

Healthy or pulmonary tuberculosis subject: ACC—73%

2014

[138]

FNN

Self-collected, 10 healthy and 20 pathological

Normal and abnormal subject: ACC—92.86%, SEN—86.30%, SPE—86.90%

2018

[27]

Deep belief networks

RespiratoryDatabase@TR

Risk level or interior level: ACC—95.84%, SEN—93.34%, SPE—93.65%

2018

[91]

Extreme learning machines

RespiratoryDatabase@TR

COPD or health: ACC—92.22%, SEN—89.44%, SPE—95.00%

2018

[154]

Deep extreme learning

RespiratoryDatabase@TR

COPD or health: ACC—95.0%, SEN—93.33%, SPE—93.53%

2019

[123]

Spectrogram, CNN

ICBHI 2017

All diseases classification: ACC—97%

2020

[155]

Boltzmann machines

RespiratoryDatabase@TR

COPD or healthy subject: ACC -93.67%, SEN—91%, SPE—96.33%

2020

[122]

Convolutional RNN

Self-collected, 16 healthy and 7 pulmonary fibrosis

Health or idiopathic pulmonary fibrosis: precision—100%, SEN—85.9%, F1—92.4%

2020

[139]

Mel spectrogram, CNN

ICBHI 2017

Non-COPD, COPD, or healthy subject: SEN—98.5%, SPE—99.0%, AS—98.7%

2020

[143]

Extreme learning machines

RespiratoryDatabase@TR

Five severity degrees of COPD: ACC—94.31%, SEN—94.28%, SPE—98.76%

2020

[156]

Statistical feature, FNN

ICBHI 2017

Health or diseases: ACC—82%, precision—87%

2021

[140]

EMD, wavelet, CNN

ICBHI 2017

Non-COPD, COPD, or healthy subject: precision—98.90%, recall—98.90%, ACC—98.92%, F1—98.90%;

Six diseases: precision—98.70%, recall—98.27%, ACC—98.70%, F1—98.47%

2021

[144]

Deep belief network

RespiratoryDatabase@TR

Mild, moderate, or severe COPD: ACC—71.74%, SEN—70.08%, SPE—73.53%

2022

[125]

CNN, LSTM

Self-collected, 103 patients

Health or five diseases: ACC—98.16%, SEN—90.06%, SPE—98.61%, precision—92.13%

2022

[141]

Wavelet, CNN, LSTM

ICBHI 2017

Health, COPD, asthma, or pneumonia: ACC—88.86%;

Health, COPD, or non-COPD: ACC—66.54%

2022

[142]

FNN, CNN, LSTM

ICBHI 2017

URTI, COPD, pneumonia, and bronchiolitis and healthy: ACC—94%, precision—94%, recall—94%, F1—93%

2022

[157]

Statistical feature, FNN

ICBHI 2017

Health or diseases: SPE—97.6%, SEN—98.2%

2023

[10]

CNN, LSTM

Self-collected, 198 patients

Disease, symptom relief, or health:

1) subject-dependent: SEN—96.98%, SPE—97.43%, AS—97.20%

2) subject-independent: SEN—43.26%, SPE—39.61%, AS—41.44%

2023

[92]

Mel spectrogram, pretrained MobileNet-V1

RespiratoryDatabase@TR

Risk level or interior level: ACC—99.25%, SEN—99.18%, SPE—99.36%;

Five severity degrees of COPD: ACC—96.14%, SEN—95.94%, SPE—98.89%

2023

[129]

CNN

Self-collected, 126 subject

Health, asthma, COPD, ILD, pneumonia, bronchiectasis: precision—92.81%, SEN—92.22%, SPE—98.50%

ASD, RDR

2019

[26]

MFCCs, LSTM

ICBHI 2017

Normal, crackles, wheezes, and both crackles and wheezes: ACC—74%, SPE—85%, SEN—62%, AS—74%;

Normal or abnormal: ACC—81%;

Health or diseases: ACC—99%, SPE—82%, SEN—99%, AS—91%;

Health, COPD, or non-COPD: ACC—98%, SPE—82%, SEN—98%, AS—90%

2020

[25]

Spectrogram, CNN

ICBHI 2017

Normal, crackles, wheezes, and both crackles and wheezes: SPE—89%, SEN—72%, AS—80%;

Normal or abnormal: SPE—89%, SEN—82%, AS—85%;

Health or diseases: SPE—71%, SEN—99%, AS—85%;

Health, COPD, or non-COPD: SPE—71%, SEN—95%, AS—83%

2021

[124]

Spectrogram, CNN

ICBHI 2017

Normal, crackles, wheezes, and both crackles and wheezes: SPE—90%, SEN—68%, AS—79%;

Normal or abnormal: SPE—90%, SEN—78%, AS—84%;

Health or diseases: SPE—86%, SEN—98%, AS—92%;

Health, COPD, or non-COPD: SPE—86%, SEN—95%, AS—91%

2021

[128]

Mel spectrograms, CNN

ICBHI 2017

Normal, crackles, or wheezes: SPE—82%, SEN—61%, AS—72%;

COPD, healthy, and pneumonia: SPE—92%, SEN—98%, AS—95%

2021

[145]

Spectrogram, Inception

ICBHI 2017

Normal, crackles, wheezes, and both crackles and wheezes: SPE—73%, SEN—30%, AS—52%;

Health, COPD, or non-COPD: SPE—100%, SEN—75%, AS—85%

2022

[24]

Spectrogram, CNN

ICBHI 2017

Normal, crackles, wheezes, and both crackles and wheezes: SPE—78.55%, SEN—35.97%, AS—35.97%;

Normal or abnormal: SPE—79.34%, SEN—50.14%, AS—64.74%;

Health, COPD, or non-COPD: SPE—91.77%, SEN—93.68%, AS—92.72%;

Health or diseases: SPE—91.77%, SEN—95.76%, AS—93.77%

  1. ACC accuracy, AS average score of specificity and sensitivity, ASD abnormal sound detection, COPD chronic obstructive pulmonary disease, CNN convolutional neural network, EMD empirical mode decomposition, FNN fully connected neural network, ILD ınterstitial lung disease, LFCCs linear frequency cepstral coefficients, LSTM long short-term memory, MFCCs mel-frequency cepstral coefficients, NPA negative percent agreement, PPA positive percent agreement, RDR respiratory disease recognition, RNN recurrent neural network, SEN sensitivity, SPE specificity, IIT Indian Institute of Technology, F1 F1-score, URTI upper respiratory tract infection