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Flashcards in Nature Of Sound Deck (71)
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1

Comes from the latin word ______ means "sound"

Sonus

2

Comes from a greek word ________ means " to write or record"

Graphien

3

Other terms for sonography

Diagnostic ultrasound
Diagnostic medical sonography

4

Branch of physics that deals with sound and sound waves

Acoustics

5

Sound frequencies beyond upper limits of human hearing

Ultrasound

6

Were the first to describe the relationship bet pitch and frequency

Greeks

7

Pythagoras invented the ______ , to study musical sounds

Sonometer

8

Discovered the angle of reflection is equal to the angle of incidence

Leonardo da Vinci

9

Studies the actuvities of bats

Lazzaro Spallanzani

10

Theory of wave diffraction

Augustin Fresnel

11

Effect of motion on the pitch of sounds

Christian Johann Doppler

12

Studies the phenomenon of piezoelectricity

Jacques and Pierre Curie

13

Wrote the theory of sounds

Lord Rayleigh

14

Sound waves to detect underwater objects ( SONAR) Sound Navigation Ranging

Paul Langevin

15

The first contact compound B scanner used ________ as lubricant

Olive oil

16

Early ultrasound equipment visual displays used __________ that produced "bi-stable" (BW) images

Storage oscilloscope

17

Gray scale was introduced

1970

18

Real time scanning was introduced

Mid 1970s

19

Application of doppler technique

1980s

20

Travelling variation in one or more quantities such as pressure

Wave

21

Two categories of wave phenomena

Mechanical Wave
Electromagnetic wave

22

A type of wave that can only travel through matter

Mechanical

23

Can travel through matter or through empty space

Electromagnetic

24

Two basic types of wave

Longitudinal
Transverse

25

Motion of the particle in a medium is PARALLEL to the direction of wave propagation

Longitudinal wave

26

Motion of the particle in a medium is PERPEDICULAR to the direction of wave propagation

Transverse Wave

27

An energy transmitted as a mechanical , longitudinal wave that requires a medium through which to travel

Sound

28

Sound is a travelling variation of ______

Pressure and density

29

Regions of LOW pressure and density

Rarefactions

30

Regions of HIGH pressure and density

Compressions