P6-Waves

P6-Waves

1. amplitude

   • he amplitude is the maximum height of the wave from its resting position – the greater the amplitude, the louder the sound

2. Frequency

   • the frequency is the number of waves per second
     • the units of frequency are hz

3. Hertz

   • what is uesed to m,essue soundwaves

4. Pitch

   • the higher the frequency, the closer together the waves are and the higher the pitch

5. Volume

   • how loud or quiet the sound is

6. echo

   • A sound caused by the reflection of sound waves from a smooth surface back to the listener

7. longitudinal wave

   • A wave that moves in the same direction as the direction in which the particles are vibrating

8. oscilloscope trace

   • The wave pattern seen on the screen of an oscilloscope.

9. reflect

   • Bounce off. Shiny surfaces, such as mirrors, reflect light well. Hard surfaces, such as walls, reflect sound well (producing echoes)

10. reflection

    • There is a reflection when waves bounce off a surface.

11. ultrasound

    • Sound with a frequency greater than 20,000 Hz (20 kHz).

12. wavelength

    • The length of a single wave, measured from one wave peak to the next.
      • the units of wavelengh are metres

13. micophone

    • takes sound waves and turns them into eletrical signels

14. speaker

    • takes electrical signals and turns them into a sound wave

15. types of waves

    • longitudinal
      • the waves move in the direction of travle
        • like sound waves
      • comprossetions-where the particals are close toghether
        • raerfection- where the particals are far apart
    • transverse
      • the waves move across the direction of travle
        • like light waves or water waves

16. the ear

    • pinna
    • Ear canal
    • ear drum
    • Ossicles
      • hammer,anvil and stirrup
    • cochlea
      • tiny hairs move and convert the soundwaves into an eletrical singnal
    • Audlitory Nerve
      • Brain

17. the speed of sound

    • sound travles fastes in solids
    • in water sound travels at 1500m/s
    • in air sound travles at 330m/s
    • sound dose not travel in a vacume