Hearing and Sound

Question 1

Sound is the result of

Answer 1

vibration

Question 2

The larger the vibration the _________the sound

Answer 2

louder

Question 3

The faster the vibration the __________ of the sound

Answer 3

higher the pitch

Question 4

Sound can travel through a variety of materials, including

Answer 4

solids, liquids, and air

Question 5

Sound travels best through_________

Answer 5

solids

Question 6

Sound travels in _____________

Answer 6

all directions

Question 7

10-65 dB

Answer 7

safe range for human hearing

Question 8

hearing damage risk

Answer 8

85-90 dB

Question 9

100-140 dB

Answer 9

danger zone for hearing damage

Question 10

How can you change the pitch on a stringed instrument?

Answer 10

1. change the length of the string (long=low, short=high)
2. Tighten the strings (loose=low, tight=high)
3. change the thickness of the string (thick=low, thin=high)

Question 11

How did shortening and lengthening the air columns change the pitch in the pan pipes experiments?

Answer 11

The pitch changed. The shorter straws vibrated faster and had a higher pitch. The longer straws vibrated slower and had a lower pitch.

Question 12

List three sounds that are safe to hear

Answer 12

whispering, talking, iPad timer, breeze

Question 13

List three sounds that can damage hearing

Answer 13

jet plane, yelling, gun shot, power tools, headphones at full volume

Question 14

pitch

Answer 14

the highness or lowness of a musical note, different pitches have different frequencies

Question 15

vibrations

Answer 15

movements backwards/forwards, up and down

Question 16

volume

Answer 16

how loud or soft a sound is

Question 17

microphone

Answer 17

amplifying device

Question 18

megaphone

Answer 18

a funnel (cone) shaped device for amplifying or directing sound

Question 19

frequency

Answer 19

the number of sound vibrations per second

Question 20

decibel

Answer 20

a unit used to measure sound intensity, abbreviated as dB

Question 21

out ear (pinna)

Answer 21

visible part of the ear which is made of skin and cartilage

Question 22

middle ear

Answer 22

three tiny bones (hammer, anvil, stirrup) that form a bridge between the ear drum and the inner ear.

Question 23

inner ear

Answer 23

inside the ear the coiled tube called the cochlea. the cochlea is filled with fluid and nerve endings

Question 24

list ways to take care of your ears

Answer 24

dry your ears, never stick q-tips in your ears, wear ear protection around loud sounds (ear plugs)

Question 25

How do human's make sound?

Answer 25

Inside the larynx there are 2 thin bands called vocal cords. When air is pushed past the vocal cords they vibrate and make sounds

Question 26

What sounds can people make?

Answer 26

snoring, whistling, burping, humming, snapping, clapping

Question 27

The __________ sends chemical messages to the brain.

Answer 27

auditory nerve

Question 28

ear drum

Answer 28

a sheet of skin that is stretched across the entrance to the middle ear

Question 29

semicircular canals

Answer 29

three looped tubes in the inner ear - these help us to balance