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Flashcards in 4.2 Deck (20):
1

What is sound

Sound is produced when something vibrates, moving back and forth quickly

2

Vibrations create regions of space- air particles bunched together. What is is called?

Compressions

3

What are rarefactions

Also regions in which they spread out

4

What is a sound wave

Is the movement of alternating compressions and rarefactions

5

Sound waves travel towards the source of sound. True or false

False, they travel away from the source

6

Sound waves carry energy form 1 point to another.
True or false

True

7

Can sound travel through a vacuum

No, only through solids, liquids and gases

8

Energy that is carried through a wave horizontally although the particles move vertically is called what...

Transverse wave

9

What is a longitude wave

Is the particles in the wave make them move back and forth in the same direction as it is traveling

10

Does sound travel faster though solids or liquids

Solids

11

When hard surfaces hit a sound wave, this is called

Reflected sound but known as an echo

12

What is sonar

The time difference between sending an receiving sound waves

13

If you are in a room with many surfaces that don't absorb sound, this is called...

Reverberation

14

Soft material eg curtains absorbs sound and turn it into cold air. Is this true

No, when sound is absorbed it turns the absorbed sound into heat

15

What is an oscilloscope (CRO)

Analysis different sounds and waves

16

What is frequency

The number of vibrations a sound makes every second in a wave

17

Hertz is the measure of what

Frequency

18

What is wavelength

It is the distance between 2 peaks measured in meters

19

Loud sound wave=

Grater amplitude

20

Soft sound wave=

Low amplitude