foam and plistyreine
no
It will expand to fit the ear to close all inputs
foam would be a good material to use for the inside of the ear defenders, as it will give more support, as well as being dense to conduct sound. Foam has particles with several small air particles, forming sound waves to absorb into it's surface.
You have your ear defenders. Then the sound waves hit the ear defenders and bounce off it.Other answerFirstly you draw the ear defender. Most likely sideways.Secondly, you can draw the materials you want to use in order and add what the particles look like in each material - close together, far apart etc.Hope I helped XD
ear rings a sit is made of material but in case of magnet it is a stone so ear ring is a good conductor.So be ware of wearing a ear ring ear rings a sit is made of material but in case of magnet it is a stone so ear ring is a good conductor.So be ware of wearing a ear ring
Cotton wool is NOT good for hearing protection as it only has an average attenuation of 7dB whereas you require 25-30dB in an average metal workshop for proper protection. DO NOT use cotton wool as hearing protection EVER. If one tiny little cotton fibre gets left behind you're in trouble - ear infection on the way!
The term for the flexible material in the ear is called cartilage. It provides structure and support to the ear, helping it maintain its shape and flexibility.
Cotton
Ear defenders work by absorbing sound energy before it reaches the ear. The material of the ear defender converts the sound energy into small amounts of heat or mechanical vibration, thus reducing the intensity of the sound that reaches the ear. This process helps to protect the sensitive structures of the ear from damage due to exposure to high noise levels.
Cartilage is the material that gives your outer ear its shape. This flexible and firm tissue provides structure and support to the ear, allowing it to maintain its form.
a vacuum is a space with no particles in it. Sound needs particles to travel through because it is just vibrations travelling through the air. Particles vibrate and hit each other and pass the vibration on. But if there is no particles, the vibration cant travel so you cant hear anything- that's why astronauts need radios to communicate, space is a vacuum. Sound travels better through solids because the particles are tightly packed together so the vibrations are passed on more quickly whereas in a gas the particles are spaced further away from each other and can travel around, so they don't hit each other as often, so the sound vibrations take more time to travel around. So yeah i guess a vacuum is a good material for an ear defender :)
Foam, rubber, and cotton wool can be used for ear defenders.