1. The reflection of sound involves a change in the direction of waves as they pass from one
medium to another.
2. The speed of sound in air increases by 0.6m/s.
3. Sound waves travel faster in cooler air than in warmer air.
4. Reverberation is the multiple reflections or echoes in a certain place.
5. Sound exhibits the following properties: reflection and refraction.
6. The turning back of the wave as it hits the barrier is called refraction.
7. The speed of sound in dry air at 0 degree Celsius is around 331m/s.
8. An application of sound reflection used by scientists to map seafloor and to determine the
depth of the ocean or sea is echo sounding.
9. Echo is an example of reflected sound.
10. Sounds are caused by vibrations, referring to the back and forth movement of objects.​