1) Accuracy Levels Due to Effect of Noise and Motion Artifacts:
We employed five subjects and each subject performed three experiments separately.
a) Still with single mobile: The subjects placed their finger over the camera lens and LED flash while the diaphragm of customized external microphone is placed over their chest. The video–audio recording application records the finger pulse at a frame rate of 24 fps, 720×480 resolution and audio at a sampling rate of 8 kHz for 20 s. The subjects were instructed not to make any movements during the recording of audio and video.