4.3 Reflection of Longitudinal Waves 3/9

Question 1

What is an echo?

Answer 1

Sound wave reflects off a distant hard object and returns. Clear exact repeat.

Question 2

What factors affect the time it takes for an echo to return?

Answer 2

The distance to the solid surface reflecting the sound.

A farther distance, like a canyon wall, will result in a longer echo return time compared to a closer surface.

Question 3

What is reverberation?

Answer 3

Reflected sound with original and other sounds MINGLED

Reverberation is not a distinct repetition like an echo.

Question 4

When does reverberation occur?

Answer 4

When the hard surface is CLOSE to the listener

Question 5

What happens in our brains when sounds reverberate?

Answer 5

The brain is unable to process sounds that return too quickly as distinct sounds. SOUNDS MINGLE

This effect is used in sound recording studios to enhance sound fullness.

Question 6

Why do some sound recording studios like to create reverberation?

Answer 6

It can make sound seem more full.

This is also why singing in the shower often sounds better.

Question 7

What type of surface is best for creating sound reflections?

Answer 7

Hard surfaces.

LIke canyon walls

Question 8

What are some uses of reflected sound waves in technology?

Answer 8

Sonar and ultrasound.

Reflected sound waves are utilized in various applications in the natural world and by humans.

Question 9

Why do movie theatres and concert halls line their walls with soft materials.

Answer 9

To decrease reverberation and allow listeners to hear a more pure sound.

Question 10

What is the difference between an echo and reveberation?

Answer 10

Echo is a clear repeat of orginal sound

Reverberation is reflected sound MIXED with original sound.