Tips
• To avoid sound pollution from hairs, you might want to wet the skin with warm water before you put the stethoscope on it.
• If you only have one funnel, you can just use the one. But the funnel end should be the end you hold against the chest, stomach or back.
• Always listen on the bare skin of the chest, stomach or back. If you put the stethoscope over the shirt, you might also hear the rustling of fabric.
• You might need to listen for some time if listening to your/your friend's heartbeat or tummy, and in all cases you might have to hold the funnel over different areas.