| A | B |
|---|
| amplitude | determines how loud or soft a sound is |
| auditory nerve | nerve that carries electrical signals from the ear to the brain |
| cathode ray oscilloscope | device that shows a graph of a sound |
| cochlea | coiled structure in the ear where hairs detect vibrations in fluid |
| decibels | unit for measuring loudness of sound |
| eardrum | membrane that vibrates when sound reaches it |
| echo | sound reflected off a surface |
| frequency | number of vibrations a second |
| hertz | unit of frequency measurement |
| insulator | material that reduces the amount ofheat, electricity or sound energy moving through it |
| medium | material that energy passes through |
| noise pollution | sound which causes a nuisance |
| pitch | how high or low a sound is |
| ultrasound | sound with a frequency/pitch above the range of human hearing |
| vacuum | space with no particles in it |
| vibrating | moving back and forward rapidly |
