W8 Activity 1 - Resonance

W8 Activity 1

Resonance

By Nicholas Carrillo

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Compression and expansion creates pressure waves that are the sound​ waves we hear and feel.

Sound Waves can Interfere

Like all waves, sound waves can constructively, or destructively, interfere with other sound waves.

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Noise cancelling headphones work by producing sound waves that destructively interfere with noise.​

Resonance happens when reflected waves constructively interfere with incoming waves.

Resonance depends on Speed of Wave, and length of cavity or string that bounds the wave.

In two dimensions, resonance depends on the shape of the surface (Drum), and speed of wave.

Multiple Choice

Which describes a standing wave?

• A continuous wave that appears to stay still.

• A wave that reflects and interferes with itself

• A wave that constructively interferes with other incoming waves.

Multiple Choice

Which describes resonance?

• When reflected waves constructively interfere with incoming waves to make a standing wave

• When reflected waves destructively interfere with incoming waves to make a standing wave

• When the wavelength of a wave matches the length of the string or cavity and makes a standing wave

We can use sound in 3D to levitate objects!

Multiple Choice

Using sound to levitate objects is called...

• Temporal Levitation

• Acoustic Levitation

• Spatial Levitation

• Magneto Levitation