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Designing Ear Defenders
Transcript of Designing Ear Defenders
Foam (inside)- too much space for all sound waves to be absorbed.
Metal (outside)- too heavy.
Wood (outside) - wears out easily and is a bad conductor of electricity.
Putty (inside)- too uncomfortable
Sound waves travel through air unless they hit a solid object. If the sound waves hit a solid object that is hollow the higher frequencies get absorbed and the deeper ones pass through. and if the object is completely solid then the sound bounces back and you hear an echo. This means that the outer shell soundproof headphones have to be fully solid and the inner part has to absorb the higher frequencies of the sound waves. Please stop when the song ends Rim: Plastic- It holds together well and can be styled easily
Outer Shell: PVC Plastic- Lasts long, it is strong, it is solid, it is easily accessible, you can mold it and it is easy to work on.
Inner lining: Silk- It is very soft on your ears and it is worth your money. Silk is also a bad conductor of heat so they will stay cool.
Center of rim: Polyester- Soft on your skull. The air particles will bounce off of the ear because the ear protector will be on the person so they cant hear the loud sounds and it will sound quiet Sound bounces off the solid object and if in a room, you would hear an echo but because the person wearing the defenders are on the other side