The murmur of aortic regurgitation is a soft, high-pitched, early diastolic decrescendo murmur usually heard best at the third intercostal space on the left (Erb's point) at end expiration while ...

The classic murmur of aortic stenosis is a high-pitched, crescendo-decrescendo ("diamond shaped"), midsystolic murmur located at the aortic listening post and radiating toward the neck.