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?

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

transverse wave

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 .