Sound

Question 1

How is sound produced

Answer 1

through vibrations

Question 2

how do we hear sounds?

Answer 2

vibrations cause air particles to vibrate in series of compressions and rarefactions till they reach the ear

Question 3

what type of waves are sound waves?

what is the human hearing range?

Answer 3

longitudinal

20Hz-20,000Hz

Question 4

what is ultrasound?

Answer 4

sound beyond 20,000Hz

Question 5

how do echos occur?

Answer 5

this happens when sound is reflected off a bare smooth surface

Question 6

how can someone around a corner hear you talking? why can’t they hear if you whisper?

Answer 6

if the gap is comparable to the sound wave, it diffracts causing it to spread and reach your ears, if you whispered the sound wave is not comparable and does not diffract as much

Question 7

what is frequency in terms of sound waves?

Answer 7

this is how squished the waves are, shows pitch, the more squished the higher the pitch

Question 8

what is amplitude in terms of sound waves

Answer 8

how large the waves are, this is volume, the bigger the height of the wave the louder the sound