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A megaphone is a simple device which is used to amplify sound. It directs sound waves in one direction , it makes our voice louder

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We chose this project because its used in many real life situations , we wanted to show how waves can be controlled , we also used 3d printing which makes our project unique as we discover experimenting with new types of materials

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There are mainly 2 types of Mega Phones , Mega Phones with circuits which can double your voice many times and Mega Phones without circuits which do double your voice but not as many times as Mega Phones with circuits we have selected Mega Phones which do not have any circuits since the ones that have circuits are too advanced to craft for merely 7th graders

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A Mega Phone without circuits works when we talk into it which causes sound waves to reflect towards the inner walls and ultimately the outer wall , this increases the intensity of the sound wave by a couple times , the shape of Mega Phones plays a big part in this because it doesnt let the sound waves scatter around

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The material of a Mega Phone can improve your amplitude which can increase the loudness of your voice , the most popular material which is used in Mega Phones is plastic but Steel and metal can double the voice several times

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It Increases the loudness of your voice without using any electricity which is cost efficient

It ensures that your voice is clear and reaches the audience your speaking to

It is Portable and Light Weight which makes people have your attention in emergencies or different situations

It is cost effective keeping in mind that it has no circuit

It is Durable and has Low maintenance as it has no circuit , even if the material is low quality it still can be used for a good amount of time

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In extreme situations when you need everyone to hear your voice Mega Phones without circuits can be quite limiting

Voices in the environment can affect effectiveness

It works in one direction only so people in other directions wouldn't be able to hear

Size does matter but if the Mega Phone is bulky and heavy it would be hard to carry it

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Think that your shouting in an open football field and then think that your shouting in an hallway the walls in the hallway reflect your voice making it sound louder , megaphones work the same but in portable form

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Ancient Greeks and Romans used Curved Markers which amplified their voices so that the audience can hear

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In 1655 a german scientist Athanasius Kircher experimented with tubes and cones to direct sound then around the same time an english inventor / scientist Samuel Morland invented the first documented forms of the Mega Phone which was made out of metal and could project voices over pretty long distances

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Mega Phones become Popular ( 19th Century ) 

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Mega Phones become Popular ( 19th Century ) 

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Mega Phones become popular and start being used in almost every theater , in military drills , in protests , and in public events . Cheer Leaders and Coaches started to use Mega Phones to make their voice clearer

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Electronic Mega Phones Rise ( 20th Century ) 

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Electronic Mega Phones Rise ( 20th Century ) 

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In the early 1900s , Mega Phones were modified with speakers and microphones , doubling their power , hand held Mega Phones become common for Police Stations and Fire Stations

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They're Still being used today in sports , theaters and Emergency Situations like traffic jams and etc , Mega Phones have advanced to recording your voice and sirens

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They can be used in Sport Events by coaches and organizers

They can be used in Protests or Rallies by the leaders leading the people who are protesting

Can be used in Emergency Situations by Police Men , Fire Fighters , or even lifeguards

They can be used in Construction Sites to talk over long distances over very loud noise

Schools on trips or hosting Assemblies

Life Guards in Beaches and Parks

Military Officers use Mega Phones to command battalions and to practice drills

Tour Guiders can use Mega Phones to talk to a whole group of people on noisy areas

Security Guards can use Mega Phones to control fans and people to warn them or tell them something at a concert or event

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https://www.brittannica.com

https://www.history.com

https://www.merriam-webster.com

i got most of my information from brittanica.com

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Fateh Shahid - Presentation Maker / Researcher

Fasih Ahmad - Presentator / Researcher

Fateh Muhammad Ali - Presentator

Abdullah Usman - Did Nothing

Yahya Hassan - Project Idea Giver

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We made our Mega Phone with plastic filament with the help of a 3d Printer