Almost all spices tend to have volatile aroma compounds and not flavor compounds like sugar, salt, acid, or glutamates. They may occasionally be bitter though. Aromas and taste work by different chemistries. Sugar, salt, citric acid, and MSG all have taste but not smell. Some foods like many fruits, have both fruity esters and essential oils, while also having sugars and acid which gives them both.
The sound of a heartbeat is caused by the heart valves opening and closing as they pump blood. When the heart is working properly, blood can only flow in one direction. The valves make this possible by opening and closing in exact coordination with the heartâs pumping action.
It is the crackling sound heard with a stethoscope when placed over the lungs. It is hard to describe it. If you google it you may find how it sounds like but a close one would be the sound you hear when you rub your hair close to your ears. It is mostly abnormal. There are many lung and heart diseases which cause it. It is caused by fluid or inflammatory exudate in the alveoli or bronchioles. It could also be caused by fibrosis or scarring of lungs which has many causes. Broadly the causes are infections, fluid in the lungs, cancers, inflammations, etc.