11.1 Loudness and Pitch

Question 1

define amplitude

Answer 1

the maximum height of the wave, from the centre to the top or bottom.

Question 2

define pitch

Answer 2

how high or low a sound is

Question 3

what is frequency

Answer 3

the number of waves per second

Question 4

what is hertz

Answer 4

the unit of frequency (1Hz = the length of one complete wave)

Question 5

what is wavelength

Answer 5

distance travelled by the wave or the distance between 2 consecutive troughs/crests

Question 6

what is waveform

Answer 6

the shape of a wave

Question 7

what is infrasound

Answer 7

sound waves with a frequency too low from humans to hear

Question 8

what is ultra sound

Answer 8

sound waves with a frequency to high for humans to hear.

Question 9

what is lambda (λ)

Answer 9

symbol for wavelength

Question 10

draw a wave description and label it

Answer 10

Question 11

The greater the amplitude, the ________

Answer 11

louder the sound

Question 12

The higher the frequency, the __________

Answer 12

greater the pitch

Question 13

What is the unit of loudness?

Answer 13

decibel

Question 14

What are rarefractions?

Answer 14

regions of low density

Question 15

What does longitudinal mean?

Answer 15

Sound waves are longitudinal so they must have a medium to travel through