What kind of pitch sound can make for thunder?
low- pitched sound
To muffle the sound of car's engine, which equipment does we need to use?
silencer
Look at the picture and answer.
air(soft)/water (louder) / wood (loudest)
What are the main part of different materials to travel sound?
solids /liquids/ gases
What is the unit for measuring sound?
decibels(dB)
Which instrument have to use to measure sound?
a sound level meter
How to travel sound?
vibrations
If the faster the vibrations, can be the higher the pitch of sound or the lower the pitch of the sound.
the higher the pitch of the sound
Not to damage ears, what things we need to use?
ear defenders
What can make vibrating objects?
sounds
what can cause large vibrations?
loud sounds
a word for "move from the vibrating object through materials".
vibrations
can sound travel through materials?
Yes
Which materials is the best to travel sound?
solids
a word for "where something comes from"
source
How can raise the pitch on a stringed instrument?
by making the string thinner ,shorter or tighter
a word for " how loud or soft sound".
volume of sound
a word for " to make sounds less and less clear".
muffle
Which materials are good for muffling sound?(hard or soft materials)
soft materials (eg. carpet/curtains)
a word for " how high or low a sound is".
pitch