What are two things that are needed for sound to travel?
Sound waves need to travel through a medium such as solids, liquids and gases. The sound waves move through each of these mediums by vibrating the molecules in the matter. The molecules in solids are packed very tightly.
What does a sound requires to travel?
A sound wave needs a medium to travel A sound wave travels in the form of a longitudinal wave and it requires a material medium for its propagation. Sound always originates from some vibrating body. The bell jar experiment is a common experiment used to demonstrate that sound needs a medium to travel.
Do you need matter for sound to travel?
Sound vibration must travel through matter. Sound cannot travel through a vacuum. A vacuum is an area without any air, like space. So sound cannot travel through space because there is no matter for the vibrations to work in.
How can you tell where a sound is coming from?
Humans use two important cues to help determine where a sound is coming from. These cues are: (1) which ear the sound hits first (known as interaural time differences), and (2) how loud the sound is when it reaches each ear (known as interaural intensity differences).
What are three ways to make sound?
The three ways are :
- By vibrating membranes.
- by vibrating strings.
- by vibrating plates.
- by vibrating air columns.
Does the sound travel if there is no medium?
The molecules of the matter carry sound waves, so without any medium sound can’t propagate. Because there are no molecules in the vacuum that can vibrate and convey sound waves, sound cannot travel through it.
How do you show sound needs a medium?
Bell Jar Experiment is used to demonstrate that sound needs a medium to travel. Place an electrical bell in the bell jar and pump out the air of the sealed bell jar. Turn on the electric bell. The sound produced by the bell is not audible to our ears.