Sound Revision

Question 1

An instrument that shows the oscillation of sound as electrical signals.

Answer 1

Oscilloscope

Question 2

Vibrations that travel through the air or another medium that can be detected by the ear.

Answer 2

Sound

Question 3

A wave where the vibrations of the particles are in the same direction as the direction the wave moves. An example is sound.

Answer 3

Longitudinal

Question 4

The part of a longitudinal wave where particles are close together.

Answer 4

Compression

Question 5

The part of a longitudinal wave where particles are spread out.

Answer 5

Rarefication

Question 6

A space where there is no matter.

Answer 6

Vacuum

Question 7

A property of sound determined by its pitch.

Answer 7

Pitch

Question 8

Sound that has a frequency below 20 Hz. Its low frequency makes it impossible to detect with the human ear.

Answer 8

Infrasound

Question 9

Sound that has a frequency above 20,000 Hz (20 kHz). Its high frequency makes it impossible to detect with the human ear.

Answer 9

Ultrasound

Question 10

The reflection of a sound wave on an object.

Answer 10

Echo

Question 11

When lots of echoes join together to produce a longer-lasting sound.

Answer 11

Reverberation