Waves in Different Media

TOP FLAP: Waves in Different Media

Transverse Sound Waves:

Fill out the missing words, add terms to the diagram in your foldable.

Even though sound waves are longitudinal waves they can be shown as transverse waves this is a model and is shown as a graph of pressure vs time.

Transverse Sound Wave Relationships:

It is very difficult to visualize changes in sound waves when shown as air particles, it is much easier to look at the transverse pressure wave form to make changes. Additional reading about sound waves in FOSS: Waves pgs. 17-27.

⬆Amplitude = ⬆Volume,
measured in decibels

⬆Frequency = high pitch

Frequency is responsible for pitch and Amplitude is responsible for volume, practice drawing what the transverse pressure wave would look like for each condition, then check below:

BOTTOM FLAP: Waves in Different Media

Use examples of sound waves from the concert hall links below and FOSS: Waves pg. 21-23 to fill out the table.

Reflection

Define reflection in sound waves

Give an example of when this would happen in a concert hall

Draw a scientifically labeled diagram above and add words.

Transmission

Define transmission in sound waves

Give an example of when this would happen in a concert hall

Draw a scientifically labeled diagram above and add words.

Absorption

Define absorption in sound waves

Give an example of when this would happen in a concert hall

Draw a scientifically labeled diagram above and add words.

Reverberation

Define reverberation in sound waves

Give an example of when this would happen in a concert hall

Draw a scientifically labeled diagram above and add words.

Constructive Interference

Add to the diagram in your foldable and describe constructive interference in your own words using the video or explanations below.

Constructive interference occurs when waves meet one another at the same time. If the crests of the waves are aligned, they will add to each other and build upon the amplitude of a wave. Have you ever heard a harmony of choir singers? The sound waves they create align and the music is louder. Or if you have ever jumped on a trampoline with others, you can time your jump down at the same time and be launched higher than you can alone.

Destructive Interference

Add to the diagram in your foldable and describe destructive interference in your own words using the video or explanations below.

Destructive interference can also occur when waves meet one another at the same time. If the crests of the waves are not aligned, they will cancel each other out and return to neutral. This is used in technology like noise-canceling headphones, which pick up on outside noise and emit the opposite frequency to "cancel" the sound. You can also experience the effects of destructive interference by timing your trampoline jumps to be opposite another persons, leaving them jumping much lower than they expect.

Simple Interference Explanation

Doppler Effect Explained

PhET : Wave Interference Simulation

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