What type of wave is a sound wave?
Longitudinal
Sound is an example of a longitudinal wave caused by ... in the air.
vibrations
What's amplitude measured in?
(decibeles)metres
Which piece of equipment increases the size of a current produced in a microphone?
amplifier
The amplitude
how loud the sound wave is
What numbers are at the two ends of the decibel scale?
0-180
What does an oscilloscope show?
sound wave on a screen
What does an oscilloscope measure?
voltage waves
What type of current flows inside a loudspeaker?
electric
Give characteristics of a wave that we can record using an oscilloscope:
- amplitude
- wavelength
- frequency
What is the top of the wave?
what is regions of low pressure due to particles being spread further apart?
![card image](../uploads/1058/17/_6cb92491_183841434af__8000_00000687.png)
crest
rerfaction
What's the meaning of longitudinal?
Longitudinal means that the wave moves in the same direction that the particles in the air are vibrating.
longitudinal wave
![card image](../uploads/1059/18/_6cb92491_183841434af__8000_00000683.png)
transverse wave
![card image](../uploads/1060/19/_6cb92491_183841434af__8000_00000685.png)
What is the amplitude?
the distance from the centre line (or the still position) to the top of a crest or to the bottom of a trough .