By placing the stethoscope over the chest and moving it until the heartbeat is detected.

By locating the 5th intercostal space, mid-clavicular line then auscultating for 60 seconds.

By placing the stethoscope directly on the center of the chest and auscultating for 30 seconds and multiply × 2.

By locating the 3rd intercostal space, mid-axillary line then auscultating for 60 seconds.