Table 5 Summarized results from the smartphone stethoscope apps review
References | Apps name | Feature highlights and characteristics | Algorithms | Outcome |
|---|---|---|---|---|
[143] | SensiCardiac | Record: 15 s of HS recording at four locations Analyze: Instantaneous classification of HS Report: Keep record of cardiac assessment in the Cloud | HS segmentation Time/frequency features extraction HS signal classification using ANN | HS classified as either functional or pathological |
[144] | StethoCloud | Cloud-based app that help diagnose pneumonia by listening to patient’s breathing sound Noise suppression and data analysis are done in a remote server (Cloud) | Noise suppression and “deep learning algorithm” (not specifically mentioned) | Diagnosis of pneumonia (and more respiratory conditions, e.g., asthma and heart failure in future) |
[145] | Thinklabs | Record and display waveforms and spectrogram in real time Edit sounds on-screen Save, email recorded sounds Does not provide HS analysis and diagnosis | NM | Recorded sounds, waveforms and spectrogram |
[146] | Mobile Stethoscope | It records body (heart, lung and bowel) sounds using built-in microphone of smartphone It does not need external stethoscope Record, save HS and display waveform Does not provide HS analysis and diagnosis | NM | Recorded sounds, waveforms |
[147] | iStethoscope Pro | It amplifies and filters HS It uses built-in microphone of smartphone Record, save and email HS, display waveform Does not provide HS analysis and diagnosis | HS amplification with variable gain Low pass filtering with user selected cut-off frequency | Recorded sounds, waveforms and spectrogram |