Introduction to Acoustics

What is a "medium" in Physics

• When the sound wave goes in between two things

• The material a wave travels through

• A repeating disturbance that transfers energy over a distance

• When air particles vibrate

Which of the following is a "medium" for sound waves?

• Compression

• Rarefaction

• Air

• Steel

Which medium will sound travel through the fastest?

• Air

• Metal

• Water

• Space

Fill in the blank: Sound Waves travel fastest through solids because the atoms are ___________ compared to atoms in liquids and gases

• Closer together

• Farther apart

• Harder

• Smaller

Fill in the blank: A sound that is 40 dB is _______ than a sound that is 10 dB

• 3 times louder

• 4 times louder

• 6 times louder

• 8 times louder

How does the decibel scale work?

• +10 dB = +10 louder

• x2 dB = +10 louder

• +10 dB = x2 louder

• x2 dB = x2 louder

Which color graph has the smallest amplitude

• Blue

• Orange

• Green

• Red

What is "frequency"?

• Number of times wave repeats in image

• Number of times wave repeats in 1 second

• Length of one wave

• How often the wave happens

Which graph has a longer wavelength?

• Top graph

• Bottom graph

• Same wavelength

________is a science that deals with the production, control, transmission, reception, and effects of sound

• Sound

• Sound System

• Acoustics

• Sound Physics