Sound I

Question 1

vibrate

Answer 1

To move continuously and rapidly to and fro.

Question 2

sound

Answer 2

Vibrations of molecules produced by vibrating objects and detected by your ear that transfers energy.

Question 3

source

Answer 3

Something that emits light or sound.

Question 4

detector

Answer 4

Something that absorbs electromagnetic radiation or sound to produce a signal.

Question 5

sound wave

Answer 5

A series of compressions and rarefactions that moves through a medium.

Question 6

compression

Answer 6

The part of a sound wave where the air particles are close together.

Question 7

rarefaction

Answer 7

The part of a sound wave where the air particles are most spread out.

Question 8

medium

Answer 8

Material that affects light or sound by slowing it down or transferring the wave

Question 9

transverse

Answer 9

Describes a wave in which the vibrations are at right angles to the direction in which the wave moves.

Question 10

longitudinal

Answer 10

Describes a wave in which the vibrations are in the same direction as the direction in which the wave moves.

Question 11

pinna

Answer 11

The outside part of the ear

Question 12

outer ear

Answer 12

The pinna and auditory canal.

Question 13

auditory canal

Answer 13

Passage from the outer ear to the ear drum

Question 14

eardrum

Answer 14

A membrane that transmits sound vibrations from the outer ear to the middle ear.

Question 15

ossicles

Answer 15

Small bones in the middle ear (hammer, anvil, and stirrup) that transfer vibrations from the eardrum to the oval window

Question 16

middle ear

Answer 16

Eardrum and ossicles that transfer vibrations from the outer to the inner ear

Question 17

oval window

Answer 17

Membrane that connects the ossicles to the cochlea in the ear

Question 18

inner ear

Answer 18

The part of the ear made up of the cochlea and semicircular canals

Question 19

semicircular canals

Answer 19

The part of the ear that helps you to balance

Question 20

cochlea

Answer 20

A snail-shaped tube in the inner ear where the sensory cells that detect sounds are

Question 21

signal

Answer 21

Current or voltage that changes over time

Question 22

microphone

Answer 22

A device for converting sound into an electrical signal.

Question 23

transducer

Answer 23

A device that changes an electrical signal into light or sound, or changes light or sound into an electrical signal.

Question 24

loudspeaker

Answer 24

A device that changes an electrical signal into a sound wave

Question 25

electrical signal (ear)

Answer 25

Information is transferred from the ear to the brain as an electrical signal (nerve signal)

Question 26

echo

Answer 26

A reflection of a sound wave by an object

Question 27

reflect

Answer 27

When a surface causes light or sound to bounce off of it

Question 28

ultrasound

Answer 28

Sound at a frequency greater than 20,000 Hz, beyond the range of humans.

Question 29

sonar

Answer 29

System that uses ultrasound to detect underwater objects or to determine the depth of the water

Question 30

transmitter

Answer 30

Device that gives out a signal (e.g. sonar)

Question 31

receiver

Answer 31

A device that absorbs sound waves.