Sounds (Tones) Elicited by Percussion
| Sound | Intensity | Pitch | Length | Quality | Example of Origin |
|---|---|---|---|---|---|
| Resonance (heard over part air and part solid) | Loud | Low | Long | Hollow | Normal lung |
| Hyperresonance (heard mostly over air) | Very loud | Low | Long | Booming | Lung with emphysema |
| Tympany (heard over air) | Loud | High | Moderate | Drum like | Puffed-out cheek, gastric bubble |
| Dullness (heard over more solid tissue) | Medium | Medium | Moderate | Thud like | Diaphragm, pleural effusion, liver |
| Flatness (heard over very dense tissue) | Soft | High | Short | Flat | Muscle, bone, sternum, thigh |