| A | B |
|---|
| As you get further from a source of sound | the sound gets quieter |
| A longer vibrating object | produce a lower pitch |
| A shorter vibrating object | produce a higher pitch |
| Some older rock guitarist | have lost some hearing |
| sound volume is measured in | decibels (dB) |
| the hammer,anvil & stirrup | are found in the middle ear |
| bats can use this | echo location |
| the speed of sound in air | 330metres per second |
| loud sounds can | damage the ear drum |
| sounds are caused by | vibrations |
| sounds travel faster in | water than they do in air |
| people who have ringing in their ears | suffer from tinnitus |
| speed of sound in water | 1500m/s |
| older people are less good at | hearing high frequency sounds |
| the outer ear | pinna |
