Ch.12.less.2.what are the properties of sound [autosaved] [recovered]
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Transcript of Ch.12.less.2.what are the properties of sound [autosaved] [recovered]
Sounds travel through 3 media.
- Sound travels through the solid the fastest
(energy passed through closely packed particles)- Sound travels through the gases the slowest.
What is an echo?Echo are sound waves that are reflected back.
(When the sound wave hits a flat, firm surface)
How can echo or noise be reduced?
By covering the room with soft, thick, uneven material.
Wall paddingFloor foam Wood panels Wall art
How does covering rooms with the abovematerials help?
When a sound wave hits the material the sound is absorbed (changes to thermal energy).
Absorption:Transfer of energy when a wave disappears into a surface.
Is there a difference between pitch and frequency?
YES!!!
Pitch is the way our ears hear sound.(The way we hear sound is related to the number of peaks BUT, they are not the
same thing)
If the source of sound is moving towards you, you will hear more vibrations.
So the sound you are hearing
becomes high pitched.
If the source of sound is moving away from you, you will hear less vibrations.
So the sound you are hearing becomes low pitched.
When you are TALKING the sound waves will look like this
When you are SCREAMING the sound waves will look like this
When you are WHISPERING the sound waves will look like this