Sound is what is produced when something vibrates in such a way that someone can hear it. The sound is heard when mechanisms inside the ear send electrical impulses to the brain.
This definition enables us to claim that sounds can exist even when there is no-one to hear them and also that objects can vibrate while not necessarily producing sounds.
Sounds have a number of simple properties which can be observed by children and can be understood in terms of the kinds of vibrations made.
Sounds:
- can vary between quiet or loud
- can vary between high pitched or low pitched
- can be single musical notes or (often unpleasant) noises
- travel outwards in all directions from a source
- become quieter the further they travel from the source
No comments:
Post a Comment