Echoes and Ultrasound

Question 1

What is an echo?

Answer 1

When sound reflects off a surface it produces an echo. Then sound takes time to travel

Question 2

how do you reduce echoes

Answer 2

if lots of echoes join together to produce a longer sound it is called reverberation

Question 3

Reverberation meaning

Answer 3

this means that they can reduce the effect of echoes by covering walls

Question 4

Ultrasound

Answer 4

Ultrasound is where you have to use it to see or spot many things

Question 5

What do we use ultrasound for

Answer 5

we use ultrasound for doctors to make images of unborn babies, bats use it to find their food,

Question 6

Another reason of ultrasound

Answer 6

Doctors use ultrasound in physiotherapy, ultrasound reduces the pain and swelling of a damaged tendon.

Another use is sonar- used on ships