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5. Select Sound 1– by clicking on this button, the user will be taken to the Sound Select
Menu (Figure 4). A second sound may be selected for comparison purposes by clicking
on Select Sound 2.
6. Play a Sound – by clicking on this button, the sound shown in the Select Sound area
will be played. Initially, there will be no phonocardiogram shown, but sound can be
heard using a stethoscope. By clicking on one of the circled areas, the
phonocardiogram will appear.
7. Compare a Sound – When selecting a sound, it is often helpful to select a second
sounds for comparison purposes. By clicking on this button, the user will be taken to the
Sound Select Menu for the selection of a sound for comparison purposes. A second
sound may be selected for comparison purposes by clicking on Select Sound 2.
8. Select a Lesson for sound under study. Every sound has a lesson. By clicking on this
button, a Lesson will appear on the screen. Each lesson has a description of the sound,
a schematic of the chest showing where best to listen, four phonocardiograms at the
appropriate anatomical location, questions and answers.
9. Select Basic Heart Sound Lesson. In case the student wishes to refer back to the
basics, this lesson can be viewed. It appears on every sound.
10. Phonocardiogram. A phonocardiogram is a graphic depiction of the heart or breath
sounds. When heart and breath sounds are being played simultaneously, the heart
sounds will appear in Yellow and breath sounds in Blue.
11. Freeze Trace. This allows the trace to be frozen for study. However, the sounds can
still be heard.
12. Trace Size. This button allows the amplitude of the trace to be increased for better
viewing.
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